Dyno Results: G37 Stock vs KN Panel Filter - Motorvate's Garage Ep. 1
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- Опубліковано 29 вер 2024
- In the first episode of Motorvate's DIY Garage we go to the dyno and find out if a K&N panel air filter makes more power than the stock paper air filter.
With a stock G37, we made two runs on the dyno, then we swapped in the K&N panel air filters and made two more runs.
Same day, same dyno, same operator, same gas, same car. The only difference is the K&N filter...
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This video convinced me to grab a pair of K&N filters for my G37 sedan. Maybe it's just a placebo effect but it does seem like the car has a bit more pep in its step in the mid-range power. I don't like to just hear "OMG buy this filter it'll make your car faster" but your video with real measurable results sold me on it. I think you made the right call on saying it's a worthy modification to do to your car. Thumbs up!
Hey Xternal,
Thanks for your kind words!
I am enjoying my K&N's as well. PLUS I love my Stillen exhaust :)
I put a pair on mine shortly after buying it 5 years ago and I knew it was a difference I just never measured it. But they're so plentiful nowadays on the internet you can get a whole kit for a hundred bucks. And it looks so much better than stock. And I live in Florida with 11 month Summers and have yet to have a problem with the heat coming off my engine into the motor. Easily the best $100 mod for this motor.
Dude actually says "maybe just a placebo effect", after just watching the dyno proof.
any problems yet? i heard that it ruins the engine long teem
term*
Finally a person who measures and doesn't believe any tales that float around.
Watched five vids about this topic and none of them presented any factual evidence. They all just talk about what they 'think' or 'believe'. Waste of time.
Thank you for doing it much better.
Hey Mick,
Thank you!
Please keep in mind, different cars/engines will get different gains.
The VQ37VHR engine in the G37/370 sure seems to respond well to a K&N filter.
Yeah, the gain for my 2.0l NA will be negligible. But the roarrr is worth the price :)
Hey Mick,
Ahhhh yes the roar can be delightful!! On my 95 Maxima with a K&N cone filter it was wonderful!
With the K&N panel filters, I don't hear anything :(
The K&N worked on my 93 240ZX. The VQ's don't respond well to mods though
Hey Stephen,
Hmmm, that has not been my experience.
My 95 Maxima (VQ30DE) picked up 14 HP with a y-pipe, 6 HP with a K&N cone and 5HP with a larger b-pipe. My G37 (VQ37VHR) also has done OK.
The KA24DE (same as your 240ZX) in my 99 Altima is stock, but maybe I should try a K&N on that.
What VQ engine/car didn't respond to mods and what were the mods?
I am interested to know more...
It may not produce much HP gain, but it certainly allows more air into the engine whilst still providing excellent filtration.
An aftermarket filter only pays dividends on more highly tuned vehicles, that can benefit from more air into the engine.
On a standard vehicle you will see little return, other than the ability to clean and reuse the filter.
It really depends on the design goals of the engine.
On the 370z/G37 the engine makes peak power at 7,000 RPM so it is designed for high air flow. Anything to reduce intake restriction will result in less pumping loss, which makes more power.
I have both stock paper and K&N. Why do I have both? Bcz I use K&N and the days where I have to clean/dry/recoat oil/dry, but have to use my car, I would temporarily use paper filter for that day or two and then once my K&N filter is fully dry and ready to go, I will pop my K&N back in and keep my paper filter for nxt cleaning interval. I've cleaned my air filter 4 times, have roughly almost 200k miles. My paper filter is nearly as good as new still even till this day bcz I used it total of 5 days throughout 14 years.
EdDy4Rheelz... wow, that is a great idea. Thanks for sharing it!
Motorvate DIY Np. Thanks for showing the data. I use both but paper filter is only for temporary purpose. Data u showed + less hassle is the reason why kn is the way to go. Ppl make all these bs reasons to bash kn saying kn will destroy the engine. I used kn filter, my engine is almost 200k, not a single problem. I've maintained my car as optimal as possible. oil changing with quality synthetic oil, decent/good oil filter, flush out transmission fluid along with replacing spin on filter every time, replacing spark plugs to ngk laser iridium, bleeding and flushing brake fluids whenever I replace brake pads, changing cabin filter, flushing out coolant, but now, I bought kn cabin air filter yesterday. I am a proud kn filter owner. Stock products suck. Aftermarket quality products are the way to go. Your video and data proves my point.
I just bought 2 sets because I'm lazy
lmao or you just take an hour in the evening and do it...... #LOGIC
I do precisely that. Course I just have an old beater 2003 Saturn.
Finally someone explained and showed this in simple terms😂 people always say filters dont make a difference
Thanks for your comment.
As for power gains, it really depends on the design of the intake and engine.
For the engine in the G37/370, it does like to breathe deep and anything to help that does make more power.
I have a K&N air filter housing and filter. I'll be honest it's a pain in cleaning and adding a really thin layer of K&N oil. I usually park my truck for the day and put it in the next day just so the really thin oiling has absorbed/semi dried so the wet oil on the filter doesn't screw with my sensor and bugger it up.
Horse power gain hardly noticeable.
Too much work involved with a K&N air filter in my opinion, considering when buying a disposable you quickly put it in and eventually toss it and buy another, it's time saving.
I do recommend if you do go with K&N kits buy another filter to have previously oiled and ready so you can just toss it in without the wait. I also noticed too that the filter get's dirtier faster which is contributed by thin layer of oil in my opinion which requires more frequently cleaning and going through the process again.
I agree, cleaning the K&N is a little bit of a pain. However, I have been doing that since my first K&N filter in my 88 Taurus.
Straight forward and honest. Extra points for the nailing the antagonists. New subscriber🍺
Thanks for subbing!
Watched your video and decided what the hell im going to buy some. They were about $130 for both and i thought it was pricey. Intsalled them in the parking lot then went home. Wow! i actually feel the power. I have a heavy foot so im always above 5000RPM and man what a difference
The Takeda single filter cai comparison to stock would be a great video .
Yes that would be interesting and could be made into a 3 way comparison (paper, K&N panel and Takeda)
Unfortunate, my budget for this year won't allow it. :(
Motorvate DIY
i already car shop machine dyno compared k&n vs stock. so i already knew k&n made more power on same day dyno few minutes apart. also my butt dyno, cold air intake made more top rpm torque vs k&n short intake which made more torque @ lower rpm.
Thanks for posting this video. I just ordered a
Z1 Silicone Post-MAF Intake Hoses and k&N drop in's. I'm going to clean out the throttle body to help improve performance when I do the installation.
Hey lazy1972,
They should work well...
Cleaning the throttle body is a very good idea. Actually that is an episode that is in post production right now and should be posted in the next few weeks.
Make sure you do the three procedures that the factory manual tells you to do. They are easy and prevents a high idle.
You got a new fan! Great testing and information! Keep up the good work sir!!!
Hey tbbsrr,
Thanks! I am planning on going back for a re-test. This time comparing brand new Infiniti filters, dirty K&N, clean K&N and no filter at all.
It should be very interesting!
I'll post this to the Fiesta ST group on Reddit and the so called experts come up with some reason why an aftermarket filter is a waste of money. I myself did notice improved throttle response after dropping in the filter, every little bit helps.
Thanks... I've used K&N since the 80s and they work well for me and are reusable.
you can poke holes in the stock filter to increase flow and hp, of course, it would shorten the life of the engine just like the k&n does
If you don't think they work well, don't use them.
On my 95 Maxima, I used K&N filters for about 12 years and when I sold the car, it had 398,000 Km on it, didn't burn any oil and ran fantastic. They work for me.
@@MotorvateDIY I know for a fact K&N filters do not work very well, back in 1991 I used one on a 460 ford until the first oil change, I did not like finding dirt in the intake post filter. after watching another video of yours I think it is pretty clear you are paid by K&N
I had a K&N on my GTI VR6 and could not tell any difference at all with it in. Just an extra chore washing it, waiting for it to dry and oiling it again instead of just popping in a new one every time.
Hey Timothy Germann,
Thanks for your comment. Based on my experience with my E39, I think the German cars have a better than normal intake system.
and yes, they can be a pain to clean :)
I'm surprised to see such a high rwhp value on a stock, untuned VQ37VHR engine. The engine is rated at 332 crank hp at 7200 rpm and so with a 15% drivetrain loss with a manual this would yield about 282 rwhp. This value is pretty close to figures I've seen for most stock Zs on Dynojet dynos, as posted in the 370Z forum. With an automatic transmission, I would expect an additional 5% loss through the torque converter for a result of about 266 rwhp.
I'm getting a Stillen Gen 3 cold air intake that has K&N filters on the ends of the intake tubes on my 370Z 6MT. Additionally, I'm getting an X-pipe cat back exhaust plus a dyno tune at the local Z shop. If I can get 310-314 rwhp I'll be very happy.
I understand what you are saying... but that is what the dyno showed.
As I found out later, the dyno is a "Land & Sea" inertia dyno, so it is very different in design and maybe calculations...
Also, the car has a 6 speed manual, so that last 5% doesn't apply here.
Good luck with your dyno and let me know how you make out.
Very good test. I believe this is true because Nissan vq engines rely on their plenum and air flow so much
Hey Ashwin Sivaainkaran,
Thanks :)
Actually the intake plenum on every engine is uses to tune where peak power is make. Longer/narrow runners promote good low RPM torque and shorter/wider runners promote high RPM power.
In the case of the VQ series engines, they always seem to respond well to breathing (intake/exhaust) mods very well :)
@@MotorvateDIY yeah I understand, shorter runners VS longer runners on intake manifolds have their pros and cons so I see what you mean
@@MotorvateDIY you knew what I mean though because even you understand how well they respond to breathing mods 😂👍
:)
very good job, i always wondered if i did the right thing paying the extra money on a K&N air cleaner,, now i know it was,, thank you.
Hey motmot welch,
Thanks for your kind words :)
Great video. Instant like. Much appreciated! Can’t wait to install these right now!!!!
Thanks for the comments... I like them and still have the in the car.
@@MotorvateDIY if you ever have the time or money, maybe doing something with the silicone intake tubing, that would be great! Love the video man. Lots of clean information
Those are some solid gains. The filter set up on this car looks like it is super easy to change. Asians = super smart!
Hey fwh79,
The K&N filters do seem to work well on the G37 (or more specifically the VQ37VHR engine)
In the late spring, I will be going back to the dyno for a re-test comparing a new Infiniti air filters, a K&N and just for kicks, NO AIR FILTER. I can't wait to see the results!
Should be interesting. I will be watching when that video drops!
K&N filter and nothing else gains are close to nothing, about 2-3% of all power. Its an additional bolt on mod that other mods likeforced induction may benefit from. Add all these little gadgets, like proper cai, catback(at least they are lighter if they dont add power) some pulleys, electric fan and it will start to feel. I usually change parts when old ones go out or will require replacement
Leo, I see you are from the E36 crowd. From my experience on my E39 530, BMWs of that age really don't benefit much front intake/exhausts, since the factory did a VERY good job.
However, the electric fan (or mechanical fan delete) does seem to free up a little power. (and prevents holes in the hood when the fan blades break)
Yeah, they have natural cai. But they benefit from Porsche mafs and induction toys. Exhaust manifold etc. I owned 4 e36s and driven plenty as well. But ny current daily e90 330i. Searching for e36 328i hellrot or imola rot loon right now.
“Sponsored by K&N”
Hey Dman 1990,
Nope... it was sponsored by me.
Hmmmph… Dbag 1990 had to throw in his two cents to get his troll points.
Persuaded! Right now I'm going out to buy a K&N filter for my Irmscher X25XEI! Greetings from Switzerland, maybe anytime you''re coming to my country we're going to Lucerne for some fondue, Marcel ;-)
Hey SuperEvoIX,
Before you buy them, you might want to see if anyone else had dynoed the X25XE before and after a K&N filter. Maybe in a Facebook group or i500 forum to get an idea how well it works with your engine.
Please let me know what you think after using the K&N filter.
One other benefit of the K&N filter is a slighly louder intake "growl" at wide open throttle.
Fondue sounds great, but there are no plans to travel to Switzerland right now.
Take care Marcel :)
ok, thank you, take care,:-)
I'll be back👍😂
Ok Sir, I'm back again and say a nice hello to you. So, I bought a K&N filter.... it has taking about 30 days! They sent it straight from Riverside/ CA to that small Switzerland! So awesome cool! Ok I can't say how much hp does it offer yet but finaly I can reporting that my engine screwing up a little bit faster (felt) and badly very smooth and with more power! Car sounding badass cool. Thank you Mister for that fine clue... Ok! Maybe next year I want mess my Vectra i500 again on the dyno! A few weeks ago he was on the dyno and pushed 194hp and 254,8Nm. With my friendly greets, Marcel/ Switzerland 👋😊
Hey SuperEvoIX,
For moment I thought something bad happened, when you said "screwing up faster", but I now think that means it is speeding up a little faster.
I'm glad you like the intake sound at wide open throttle... so do I!
I look forward to your dyno results next year.
Take care Marcel :)
No ads in video = paid for content. What, we're you just feeling generous this video to make a free video?
Hey xxdizannyxx,
Paid content would be great.
However the dyno cost was $220 plus camera work and editing.
This is something that I was wondering and I brought a few cameras with me.
The results are simply what the dyno showed.
I do plan on re-testing in the spring to see if the results are repeatable.
@@MotorvateDIY if I was wrong I apologise. Thank you for your video/time.i need to practice humility more cuz I tend to be an asshole too much :)
Hey xxdizannyxx,
No need to apologize. There are so many fake videos with paid content it's hard to know an "un-biased or unpaid" video vs "biased or paid" video.
My other channel OBD4Everyone (ua-cam.com/users/obd4everyone) explains how to use the OBD (on board diagnostic) port with a cheap OBD scanner and different apps to read trouble codes, clear them and more.
Thanks for solving the age old question. subscribed
Hey fc8697syp,
You are welcome and thank you for subscribing.
that a WIX filter? none the less how dirty/old were the old paper filters before dyno'ing? I'd imagine old really dirty filters would make a bigger difference compared to brand new or completely clean paper filters. Thank you
Hey sk8punk318,
Nope, it is a used Fram filter. It was a little dirty but no too much. I should of tested with a brand new filter.
I will be going back to the dyno for a re-test in the late spring to test a brand new Infiniti filter vs K&N vs no air filter.
I can't wait to see the results!
These cars have dual intakes hence why 14+ extra horses... you wont see this with every car. In most cars you're lucky to get 5+ ponies. Good job Nissan, this is a well designed engine!!
Hey Classified Project,
You are correct. The engine in the G37/370Z (VQ37VHR) is designed to breathe deeply and can take advantage of low restriction air filters.
It all depends on where the bottle neck is. If the intake ports on the cylinder head are small, then a free flowing air filter won't wake any difference.
BUT if the bottle neck is the paper air filter and it is replaced with a high flow (low restriction) air filter, then more power can be made.
Would have been nice if you used the Nissan paper filter for the comparison. Cool video tho!
Thanks! You bring up a VERY good point, but it never crossed my mind. I have always thought paper filters flow about the same regardless of brand.
@@MotorvateDIY "Test, don't guess". My own thought is that there is likely a HUGE difference in quality and performance among the many brands of filters available. Someone who wishes to promote the K&N filter could choose the worst-flowing paper filter to make the performance of the K&N shine. This may have never crossed your mind, but it's possible that, if not intentionally, the worst-flowing paper filter in the universe was selected for this test, and any other paper filter may have shown a less dramatic, or even no difference. Update: Elsewhere in the comments you have admitted that the paper filter used in this test wasn't even new.
Wow, wasn't expecting that.
Hey Tylet Padgett,
I wasn't either... BUT that is what the dyno showed.
I do plan on going back to the dyno, just to double check the numbers.
I'd rather keep my rings. I guess I'm one of the few that hate the k&n. I have a pile of them over the years. One of the first things I check when getting the car and the first thing to come out. Them, and "cold" air intakes. Most stock filters are way over-sized anyway. No difference in power except a dusted engine, oil on maf, scheduled oilings, and being overpriced.
Hey extraace,
I fully respect your opinion on K&N filters.
However, my experiences are different. My 95 Maxima and G37 did make more power (as tested on a dyno) with a K&N filter.
I don't live in a very dusty area, and the used oil analysis on both cars showed the K&N did an OK job filtering out silicon (sand):
ua-cam.com/video/uvExyfxzsRo/v-deo.html
As for the cost, yes they are expensive! BUT the K&N cone filter on my 95 Maxima was on for 10 years and it paid for itself after 4 years.
It also had over 300,000 KM (186,000 miles) and did not burn any oil. I hope my G37 follow the same path. :)
Sounds like it's working out well for you.
I used to move through a lot of cars and particularly motorcycles. Now it seems that I just gather them. It was pretty much a guarantee the ones with K&N would have dust/compression issues. It was really irritating me and that's where my dislike came from. I actually have a low compression K&N victim right now I have to start work on- 524TD(if you're familiar). I have two of the same. The lower mileage one has almost half the mileage and compression than the other. K&N was in it. I did buy it knowing about the compression.
I do however have a gauze filter on my turbo bike. It was the easiest option though.
Seems like most of the problems are from people installing them and not reoiling. So, I'm sure it'll probably go well for you and the g37.
Hey extraace,
I assume the reference to the 524TD is an older E28 BMW? If so, that is a great looking car.
As much as I try to reduce the variables in testing, there are always more than you would like.
Where I live, it is not very dusty and that might help with my results.
Yeah, in the dyno everything look fine but some thousand km later check your fuel consumption-your MAF-your oxygen sensor-engine noise (i was a k&N and BMc air filter user)
not everything is ideal (as a simple dyno says) are in real life on road.
Hey Grenadieros [GR] ,
I understand and agree with what you are saying.
However, I do have data to show that for my car (Infiniti G37) in the conditions I drive in (not very dusty or sandy) it works well in the long term:
K&N Filter Test… Two Years and 50,000 KM Later: Motorvate's DIY Garage Ep.34
ua-cam.com/video/7D9lJxQ1s-U/v-deo.html
Also, I had a K&N cone filter on my 95 Maxima for about 350,000 KM (217,000 miles) and the engine ran great when I sold it with 398,000 KM (247,000 miles)
The K&N filters work well for me and have not caused any issues.
@@MotorvateDIY : Good evening sir, how are you? i forgot to add the dirty throttle body which you have to clean regularly.
I have used in the bast gauze filters but in traffic conditions or sandy areas offered me nothing more than troubles in long term use.
I DON'T say that these filters are ''not good'', all i am saying is that require a lot of maintenance to work properly which they do only n in certain situations (climate-traffic).
Here in Southern Europe we don't have ''highways'' like there in USA so it's hard for the odometer to count thousands of Km per year.
Hey Grenadieros [GR] ,
If I lived in or close to a desert I would use the factory air filter for a while. Then get a used oil analysis to see how much sand is in the oil (silicon). Then try a K&N and do another used oil analysis to see.
If you are not familiar with what a used engine oil analysis tells us, here is a link to that episode:
ua-cam.com/video/uvExyfxzsRo/v-deo.html
Thanks for your comment!
@@MotorvateDIY : one last question sir, what's your opinion about the Carbon dynamic airbox systems?
Hey Grenadieros [GR] ,
I don't have any first hand experience with them, but they do look to be interesting.
Here are my thoughts:
They look a little large and it might be difficult to fit under the hood.
Also, it's a little unusual for the air flow to enter inside the air filter, where the surface area is smaller. Most cone air filters (and oil filters) filter from the outside and flow to the inside.
Does this hurt performance difference? I don't think so, since I suspect the air filter is designed for high flow and low restriction.
Another thought is the air flow path. As the air flows into the filter, it needs to turn 90 degrees, then flow through the filler, then turns 90 degrees to head towards the exit, then turn 45-90 degrees to exit.
To me, all those turns can't be good for air flow compared to a typical cone filter.
From a somewhat dirty OEM engine filter to this K&n filter on a 2016 Lexus ES 300h, it definitely made a big difference for me! I can definitely tell the increased HP! My car is actually a bit more fun to drive now and can more easily pass people on the highway! Definitely worth the $44 I paid for it!
Maybe the next thing I'll try is an OBD2 device that edits the ECU for better HP/Torque performance!
I'm glad you are happy with K&N filter :)
BUT don't waste your money on any plug in "OBD2 device" that edits the ECU for better performance. They are all a scam, and all they do is flash a LED to make you think it is doing something.
Watch this: ua-cam.com/video/zx8fywphQp0/v-deo.html
Bad test because those aren't the oem filters. For all you know those paper filters are way more restrictive than the Nissan filters. Maybe the Nissan filters would have made around the same power as the K&N filters. And even though i gained highway power when I used the K&N filters, I lost low end torque so I stopped using them. Made driving in the city horrible.
When the test was done, I didn't have OEM filters, BUT the filters used in the test are still very common.
You loss of low end torque is not something I have seen in the 33 years I have been using K&N filters. Maybe it is specific to the design of the intake system.
@@MotorvateDIY I've bought them multiple times over the years so it wasn't just a 1 time thing. My GUESS is that the K&Ns let in so much air that it confused the computer and it cut power. I drive VERY aggressive so I notice things like that. I could spin the tires with the Nissan filters from a stand still but no matter how much I tried I couldn't with the K&Ns. The car was faster on the highway though. But one time I found puddles of red oil at the bottom of the air boxes and I haven't used them since.
That's interesting... and I can't explain why it would be like that.
Thanks for your comment :)
@@MotorvateDIY Just did a quick search of them and low end power loss and it's actually a common thing. Most people that don't drive hard probably wouldn't notice it though.
I don't doubt you... but that has not been my experience with K&N filters from over 30+ years and 5+ vehicles.
If the engine uses a speed density type fuel injection, the K&N could confuse the engine computer.
All of the vehicles I have used it on are the mass air flow type fuel injection, and worked well, with no loss of power.
First run was probably cold, you should have let the car warm up before putting it on a dyno
Hey Burak Muhammetoglu
Actually the car was fully warmed up on the first dyno run. The OBD data logger showed the engine coolant temp at 96C for the first run.
Wow thats actually a very good result then. Did you modify the ECU to run correctly with the K&N? Thanks for the reply.
Hey Burak Muhammetoglu,
The ECU is stock and it works well with the K&N and the Stillen exhaust.
Why do you think the ECU needs to be "corrected" to work with the K&N?
this is great. thank you
I still have those exact same K&N in my car from 2016 and they haven't been cleaned in about 36,000 miles.... all for a future episode :)
Unfortunately there is quite a lot of data out there on particulate filtering performance, where K&N filters fail horrendously. A few HP gain, much gunk in the engine... **weigh scale hands** - I know what is more important for me.
Hey Justify Justin,
I had the same worry. So I did a filter test to see: ua-cam.com/video/uvExyfxzsRo/v-deo.html
Thanks for the link. I really like your methodology of testing the oil for contaminants - my only real concern (from a technical point of view), is that although factors (like oil type & change intervals etc.) are controlled and normalised, the exposure to the quantity and type of dirt isn't. For example someone in Canada driving 10 000km will experience different particle matter than someone in sub-sahara Africa. What I'm getting at is, if you could control the dirt quantity and delivery in a controlled environment (a dyno for example) and then do the oil test, one could empirically conclude that the K&N system is at least on par with the stock filters. What I did learn from your test was that in your climate they seem on par (which gives one hope :) ).
Hey Justify Justin,
Very well put and I completely agree with you!
As with all of my videos, I am sharing my test results. Others might get different results for many different reasons.
Hard to believe these results, sorry. Did you alternate filters each time you tested or did you do a series of tests with each filter consecutively?
Hey heymisterderp,
The car was dynoed twice with the paper filters and the results were averaged. Then the k&N filters were popped in and about 10 minutes later two pulls were done on the dyno and the results were averaged.
I agree that the results seem a little high, but that is what the dyno showed.
In the fall I am planning to re-test and dyno K&N, OEM, K&N and then OEM. I will also have a high resolution (14 bit) differential pressure sensor measuring the pressure drop across the filters. (and maybe across the MAF, throttle body and outside to intake manifold)
I think it will be very interesting in what the data shows. :)
ok thanks , I change my OEM catalytic converter and place a aftermarket cat , my car felt a lil sluggish,
Hey Torvarris Brown,
Yes, it is possible the aftermarket cat doesn't flow as good as stock, which would make your car feel sluggish.
should also check ot after driving a day or two its to my understanding the computer adjusts itself over time for the power band a back to back you def would have a bit more power but i really wonder if it stays lol
Hey Shawn,
You bring up a good question: "Does the ECU on the G37 adjust over time?"
I have been researching how this specific ECU works and it is mostly driven by static tables that take into account air temp & pressure, knock, ignition advance, air flow and air/fuel ratios to determine the fueling requirements. I still have more work to do, but I don't think it does.
There are plans to dyno the car again with NEW INFINITI AIR FILTERS and used K&N filters later this year and it will be interesting to see what the results are.
He's right! i bought a Green filter in the past for my Golf V it felt quicker first 2 days with the Green filter after 2 days the Ecu is adjusting the parameters to default for what it should be.
Interesting... I wonder if you simply got used to it? For me, using "feel" is very inaccurate.
Did you happen to do any data logging from the OBD port to see what the DME is doing before and after?
i did not log anything but i did put back the stock air filter and no difference at all :D
Did you fill your tank up and add 200 lbs of fuel on the third day?
What about the MAF SENSOR??? And there's 2!!!!!! My pops talking sheeit saying later ima have a problem??? Can't I just clean them, hes saying that the k&n air filters have grease that coats your maf sensor and gives wrong air reading to engine??????
If the K&N filters are not over oiled when cleaned, it won't be a problem
@@MotorvateDIY wait so I have to re oil them after I clean them?? I didn't know that?? But I also didn't read the box🤦♂️ "daym kids now dayz hahaha THANKS FOR THE REPLY 👌
Amount all cars I ever owned...this G37(my was 370Z) is the easiest to change air filter(s)
Hey Lihi HonGan,
Yes... Nissan / Infiniti made it very easy to change the air filter :)
"Among all the" "have ever"
Wow, that's awesome. I know what I'm going to use.
Hey Gonzo21,
They work for me... BUT I will be double checking and going to a different dyno soon for a retest.
But how much better does the K&N filter against dust Vs. stock filter?? It is a filter after all... And also, whats the MPG difference between both filters??
Hey clover851,
Good questions! I use a "used oil analysis" to see how well the air filter is doing its job. Here is the first test:
K&N Filter Dirt Test: G37/370z - Motorvate's DIY Garage Ep. 16
ua-cam.com/video/uvExyfxzsRo/v-deo.html
I did a used oil analysis on the non OEM paper filter that came with the car when I purchased it and the K&N about 6,000 miles (10,000 KM) later.
In this test the silicon level (sand) was the same a just under 30 ppm (parts per mission). So, for how I drive, in the conditions I drive the K&N is filtering just as good as the paper filter. BUT to be honest, I don't live in a very dusty/sandy area.
As for MPG, since most cars have fuel injection, there won't be any difference in gas mileage. Most of the time the engine computer will keep the air fuel ration very close to 14.7:1 (lbs air:lbs fuel)
Thanks for your comment!
@@MotorvateDIY Thank you, again for the info.👍 P.S. ever try the AEM dry-flow filter for comparison against the K&N? (I know they are made by the same company, I'm just curious how well it stacks up to the K&N. Air flow, filtration, MPG, HP, ect..)
Hey clover851,
A few people have asked about the AEM dry flow filters. I don't have any experience with them... I may need to change that :)
Hello I don't know if you'll reply but have you ever tested those MAF tubes? with the combo of your stillen catback and k & n drop ins? the tubes cost way less than a cold air intake if you prefer to keep the stock look. Thanks
Hey ItAintGay,
Of course I will reply... I check in every 1-3 days to keep on top of any comments or questions :)
Anyways, I have not test/dynoed the silicon MAF tubes, but I will see if I can fit that in to the budget for 2018.
It would be very interesting to see if a straight intake vs a stock corrugated makes more power.
Could provide another reading without the filter itself?
Madan,
Sorry, but the $150 for the dyno run is not in my budget for this year, as most of the episodes for 2017 are already budgeted for.
Usually a test like that results in a HP loss due to the air turbulence created by the air rushing into the airbox and confusing the mass air flow sensor.
The air filter's second job is to smooth the air flow and reduce the pressure pulses. An air box without a air filter turbulence is similar to driving on the highway with the window open.
However, I looking into doing an episode where I measure the pressure drop (in inches of water) at different points along the air intake.
Motorvate DIY, it would have been nice to have this crucial data as well.
So to feel 7hp more u gona have to drive the car in the redline the wholetime.
Hey mzr 3,
Only when you want that little extra :)
Its a hi revving engine it loves it.
So you started the day with a filtration system that’s flow exceeds the breathing capabilities of the stock engine. You then increased flow potential to a engine that cannot consume the added flow potential. The dyno some how picked up 14hp? With only changing the filters do you think velocity went up a significant amount? Doubt it since it wasn’t restricted.
Hey Steve Pounder,
Excellent question!
I think the engine in my G37 (VQ37VHR) DID respond to the additional flow and that is why it made more HP. As a very general rule every 1.6 CFM increase of flow is equal to about 1 HP. With that in mind, I think the K&Ns allowed an additional 22 CFM at the same intake pressure. (When talking about flow, the pressure it was measured at must be mentioned)
K&N shows the 33-2399 filter flows 278 CFM at 1.5 inches of water. The G37 has two filters, so two filters can flow 556 CFM.
556 CFM divided by 1.6 means the K&N filters can support enough airflow to support 347 HP. (if the ECU allow it!)
That's my theory anyways
In the late spring, I will be going back to the dyno and re-test. BUT this time I will have brand new Infiniti paper filters, K&N and just for fun NO FILTER. AND I will have a 14 bit, high precision differential pressure sensor to measure the pressure drop across all three tests. I can't wait to see the test results!!!
Motorvate DIY If this engine was operating at 100 percent VE at 7K RPM the cfm requirement would be 435. Since we know 100 VE on a NA engine is impossible that number is actually lower more than likely close to 326 cfm. Stock filters are in the 220 range each so more than enough to feed the engine. You’re updated testing methods will hopefully shed light on this. Apologies I realize I sounded like a ass in my first response.
Hey Steve,
No apology needed, I though you asked a good question :)
Through data logging at wide open throttle, in second gear, there is 154-155 g/s flowing through "MAF A" at 7,200 RPM.
The temperature was 21C and the barometer was 99KPa.
If I have done the math correctly, that equals about 265 CFM for half the engine or 530 CFM in total.
The OBD PID "Absolute Engine Load" is a measurement of how much air has moved through the engine divided by the engine displacement (plus some temperature correction factors) During the test run above, at 7,200 RPM is indicated 106-107%.
With all this in mind, I do think newer NA engines can have a VE above 100%, due to variable cam timing, intake manifold tuning, and high compression.
The actual pressure measurement will be very interesting to analyze.
@@MotorvateDIY is that happening for your 2020 season?
@@reesecup4567 I hope so... but the covid-19 has many shops closed. :(
I'm definitely interested in knowing if a full cat-back exhaust gains any hp?
I am editing the Stillen exhaust video now and it will be out Dec 30. Air/fuel ratios will be added to the graphs to show the factory tuning goals.
Still working on the Stillen Cat-back Dyno video... It took much longer than expected to organize the air/fuel, timing, and air intake temp live data to the dyno run. It will be done January 6th :)
am trying to get back the OEM parts for it
Hey Torvarris Brown,
Good luck and let me know your results.
Well then it makes sense that a K&N reg filter will do the same thing on other engines and different sizes, C I.
Hey Robert Hills Jr,
I am not so sure.... it depends on how well the ECU (engine control unit or computer) can adapt to increased air flow. The G37 (and most Nissan's from my experience) seem to do well. My 2001 BMW 530, not as much.
I put in the stillen gen 3 cai and ever since then I've been having idle drop problems when I put in drive or stop it drops to about 450 its not as bad as when I put it in drive. I've cleaned everything MAFs TBs disconnected battery etc but the car still does it sometimes and sometimes the car even sputters as the idle is dropping even at around 800. for some reason it doesn't do it as much on cold starts even after I drive around a bit and it doesn't do it at all with the a.c. on. dealer said my a/f ratio was at 12.4% and that is was off. any thoughts? thanks
After cleaning the TB, did you do a "Idle air volume learning" procedure? If not you should.
www.myg37.com/forums/engine-drivetrain-and-forced-induction/262657-idle-air-volume-learn-fix.html
At idle your a/f ratio should be close to 14.7:1.
Did the dealer say "12.4%" or is that a typo? If they did say "12.4%" they are probably talking about the fuel trim and yours might be adding fuel to compensate for a perceived lean condition. That can explain the low idle and the sputtering (might be a misfire due to the lean mixture)
During a cold start the mixture is slightly richer and the car runs fine.
Soooo, there are a few things pointing to a lean mixture.
Have you double checked all intake hoses and clamps? Pay careful attention to the 1" hoses that connect to the valve covers. Sometimes they get over looked. Any air leak after the MAF will cause a lean mixture.
Let me know...
you should do it again with stock paper filter..
Hey Black beast E550,
I am going go. In the late spring I will be heading back to the dyno for a re-test.
This time: new Infiniti filters vs K&N vs no air filter. It should be interesting!
Motorvate DIY that would be nice. I put some kn filters on my Mercedes e550 and I didn't notice any gain I believe I lost some hp. but I have a friend with a g37 sedan and put kn filters and delete resonator and his car was a monster...
Hey Black beast E550,
From my E39 experience, German cars seem to have very well designed intake systems AND make peek torque at low RPM (like 2800 RPM), where a free flowing intake won't help. The G37 makes peek torque at 5,200 RPM and a slightly less restrictive intake makes more power all the way to the 7,500 RPM redline.
I really don't know what to expect with the reset, but is should be very interesting!
Motorvate DIY yeah my e550 os a low rpm torque monster it have 391 lbs of torque at just 2500 rpm. and some people said their underrated which I believe is true cause I beat a 470 hp scat pack charger we race like 5 times because I couldn't believe it..lol
High torque at low rpm feels very nice!
Imagine what happes if you apply this filter to a 3.0 V6 diesel engine with the DPF removed. I see up to 30hp+ and 50torque up
Hey greycy89,
I don't know very much about diesel but I will take your word for it.
Motorvate DIY dont you use diesel at all there? Low mpg,huge torque...why not?
Hey greycy89,
Diesels cars are popular in Canada, but I have never owned one, or worked on one.
i have a vital question about your video were you doing an ecu tune before and after each run or or is that gains without a tune?
Hey Daniel Monteith,
The ECU is stock. The only difference was swapping in the K&N panel filters.
Did you start with a new paper filter?
Hey Frank,
Nope, I dynoed what was in the car.
However, in the fall I am going to dyno again with a brand new Infinti filter, K&N and no air filter to see what happens. The dyno runs will be in this order: K&N, OEM, no air filter, K&N, OEM, no air filter and maybe one more K&N, OEM, no air filter.
I can't wait to see what happens!
Hey, did you ever get to do this test? I'm really interested to see the results of this!
Hey Dmitry Afanasyev,
The re-test is going to happen, but it has been rescheduled to the spring.
My 2013 G37xs basically had new paper filters (week old) when I put it on the dyno. I had very similar results after putting the K&N drop in filters in. +13.36 Hp gain
What about a cold air intake?
Hey Shawn Cao,
That would be an interesting test... however, they are not in budget for this year.
its great for TRACK DAY but for every day driving not so much tell ya what drive her for 35,000 under normal everyday driving conditions then lets have a tear down of your intake and look inside
Hey James Car,
I like your idea. That filter has been in the car for just over 2 years and close to 30,000 miles. I don't want to tear apart the intake, but I could make a video showing the condition of the MAF and intake going to the throttle body.
I am also going to be going back to the dyno for a re-test, but this time with new Infiniti filters, dirty K&N, clean K&N and just for fun, no filter at all. It should be interesting!
Thank you for considering this in years past I have run K&N (mostly in off road application) what have seen is the oil impregnates the intake runners and actually collects dirt and debris but I have never had the opportunity to show this to anyone hoping you have better luck
Hey James Carr,
I have seen what you are talking about on other cars and I will shoot the inside of the intake on the G37 next week.
Can't wait to watch your in depth next segment
Hey James Carr,
Just to let you know, it won't be the next episode, but should be out next month :)
Wt do u think I should buy K&N filter instead of stillen long tube intake ?
Hey AlHarrasi Nidal,
I have no first hand experience with the Stillen long tube intake so I can't make a comparison to the K&N panel filter.
I do believe Stillen makes quality products, however the the factory intake is also very well designed.
Good luck in what ever you decide :)
wish I could see the actual screen from the computer
Hey sk8punk318,
Hmmm I just might have that, let me do some digging and see if I can find it, as that video was shot 18 months ago.
is this your dyno??
I wish, but no, it is not my dyno. I rented the dyno and operator for 2 hours at Active Engines in Oakville, Ontario.
am wondering if that can affect my performance
Hey Torvarris Brown,Yes, it is possible the aftermarket cat doesn't flow as good as stock, which would make your car feel sluggish.
Why did you replace the catalytic converter?
Who makes the replacement?
i like K&N but I'm concern about if the high flow will be able to catch al the particles so they don't escape in the engine
also since have been using K&N i use more gas and increase in engine noise, i always notice engine sound change like i have low engine oil after using K&N any advice?
Hi Prince. I understand your concern about "high flow" and "not filtering as good". I used a Fram air filter for 6 months and had the used oil analyzed when I changed the oil. (A "used oil analysis" is a report that shows you how much metal, dirt, gas, coolant, etc is in the engine oil)
Then I ran the K&N filters for 6 months, changed the oil and had it analyzed. I am still waiting for this report, and will make a video showing my results and explaining what they mean. I think the K&N filter just as good as paper air filters.
I had a K&N cone filter in my 1995 Maxima for just over 300,000 Km and the engine didn't burn oil and ran great.
The engine noise I hear is more like a "growl" when accelerating at full throttle - and I LOVE that sound. Others may not.
thanks ill be waiting for the k&n result
thanks a bunch
14 hp for just a filter not bad
Yes, I was a little surprised... On my 95 Maxima a K&N cone filter with a Stillen velocity stack made 6 peak HP, and sounded fantastic at wide open throttle!
Motorvate DIY i drive a 12 cts coupe and they only sell a k&n thyphoon intake for this model but its an aluminum tube and the cone is not completely covered so im going to buy just the filter :)
Good decision!... and your gains may not be too far off the typhoon kit. PLUS your engine won't be sucking in HOT air from under the hood.
Motorvate DIY great video! Now i need to find one where they dyno a throttle body spacer hahah
Maybe you could be the first to dyno before and after?
I don't understand all the hate this video is getting. do people not realize for spending $100 on 2 filters to gain 14 WHEEL hp is a fucking great deal. In most cases you're going to have to spend 5x-10x that amount on a catback to gain the same amount of hp. The whole idea behind this is just a comparison and I'm glad he posted it too.
Hey sk8punk318,
Thanks for your comment. People think I am paid by K&N and have lied about the results.
I do like K&N products, however I have only reported the data that I paid to collect (I purchased the filters used and paid for 2 hours of dyno time)
I had planned to go back to the dyno for a retest in October/November but my work schedule didn't allow it. Now I am planning on the spring.
This follow up test will include a NEW OEM filter, the used K&N and no filter. I think the results will be very interesting.
Motorvate DIY I used brand new paper filters (week old) and achieved the same results you did after replacing them with K&N drop-ins. I gained 13.36 HP It was 84 degrees here in Houston at the time.
Hey Bradly King,
Thanks for posting this! It is nice to have two tests with similar results.
Buy aftermarket filters once or buy OEM filters multiple times when they're dirty. They can possibly pay for themselves while the car being quicker and better mpg's. I always buy dry filters due to the MAF.
@@a98ctr62 were the old filters filthy?
Since the G37 uses two intakes and two filters, switching to K&N probably makes more of a difference than most engines. But damn 14hp just from a filter swap? I'm lucky if I get that out of an expensive cat back exhaust.
Darksyne wow exactly what i was going to say 👍minus the part about the cat back
That is a clean new change.... Go 5000kms with the KN, the air sucking pulls oil off the KN filter and coats your MAF. making engine performance and gas mileage MUCH worse.
TheKodiak72 negative only if you over oil it. Besides modern maf sensors are covered not exposed like the 90s.
What most people don't understand, is that you will get a small boost in hp & torque. But where you really feel the gains is in throttle response! I have noticed in my FX 35's response was 2 times quicker than before I installed my K&N stage 2 CAI system. Improved a couple points in mpg as well.
So the moral of the story with cold air intakes, is you get small/minuscule hp, torque & mpg gains, & dramatic throttle response gains! Add a performance mass air sensor, & a $600'ish high flow cat-back exhaust, & you will think you have a different engine under the hood.
Darksyne that's the opposite of how that works. Two filters means less flow needed per filter...therefore less of a difference.
Remove air filter = 1000hp
The Raider 😀
2 weeks later, need new engine, due to dirt, bugs, & other shit gunking up your engine til it mutherfucking BLOWS!
Joel Williams but he had 2 weeks of fun! 😀
Joel Williams lmfao
Actually 0 bhp. Your car will stall if it sucks too much air. Common occurrence when you go to clean the system 😂😂
Excellent empirical information!
Winston, thank you! I really enjoy analyzing data to uncover the information within.
great vid, I'm putting mine in on my G35 Sedan tonight! Also at 7000rpm it looks like you gained 19hp
Hey NightHawl0077,
I hope your gains are the same as mine.... Nissan's VQ engines really seem to respond well to intake/exhaust mods.
Good luck!
I beg to differ Motorvate..I got rid of my G37 as did my son with his 350Z. Mods did next to nothing for these cars and it's documented on myg37.com. I traded the G37 and picked up an 06 C6 Corvette and have never regretted it even after the lifter sand cam went south.
Hey Stephen,
That's interesting... I am all over myg37.com everyday and haven't seen any posts where people did an intake and exhaust and didn't measure a gain. I have no first hand knowledge on the 350Z, so I can't comment on that.
Would I trade in my G37 for a C6??? In about 2 heart beats, however I still need 4 doors for a while.
Enjoy your C6!
Did you see any gains? I just bought a 08 g35s, Thinking about a CAI, or just the K&N filters... I hear mix reviews on the CAI.
@@stephenr9194 Sir you're comparing a $5 000 G37 to a $25 000 corvette.......... of course you would rather have the vette, so would anyone else!!
im actually shocked it put out that much more. I know what im gonna go get now!
What a beautifully linear power line, and a nice constand torque, amazing. That is part of the charm of a natulally aspirated engine.
Hey Tim de Groot,
I agree with you, it is a great engine :)
Top video! A fair comparison which seems to answer the age old question. This is better myth-busting than MCM!!! More power could probably got with a re-tune too :-)
Phil, thank you!!
The problem I have with getting a tune is the cost!! It would be about $800 Canadian for maybe 10-15 HP.
That $800 dollars gets me closer to a new 4K camera :)
Great Video man I have used K&N air filters for over 12 years never had an issue. People don't realize how great they flow when dirty, and they over clean them. They also don't realize how little oil K&N puts on them at the factory.
Hey Ford ST,
I think you nailed it!
Just for kicks I will be going back to the dyno to re-test just to double check my results. It should be very interesting.
Ford ST dude my filter was oily as hell.
1:06 "aboot"
Hey BestOnlineGamer: Shhh, don't let everyone know I am from Canada, eh? :)
I like the stupid voice you made in 2:26 😂😂😂
Hey Ali Ben Ashour,
That was my mini tribute to Jeremy Clarkson. He would make a stupid voice like that when he would imitate "haters" talking. Thanks for noticing!
I'm just joking you're making good job 😂
He said “Nee-San” haha
Hey David Michael,
Yup, that is how we say it in Toronto. :)
I like it. Knee-San
244tq 286hp stock filter
250tq 300hp k&n filter
for those who are too lazy to watch
Thanks for the summary :)
It's the cleanliness that counts. Were you using a brand new paper filter?
Hey Nick Amarit,
That is where I messed up... I used the filter that came with the car when I bought it.
However, I will be going back to the dyno with a brand new Infiniti air filter for a re-test.
I will compare a clean K&N, dirty K&N, New Infiniti filter and a few runs without an air filter
AND data log coolant & oil temps and a few others.
Stay tuned for the update!
@@MotorvateDIY Use your standard filter the K N is not worth extra money you pay for them stay with what ever your make tells you to use ,And dont fall for the nitrogen in your tyres scam its big scam .
Hey goldwingman1500,
I am comfortable with the K&N filters and have used them for over 30 years with a combined total "K&N filter" mileage somewhere around 500,000 KM on 5 different cars and 1 bike., without any issues.
Have you had a failure of something due to a K&N filter?
Don't forget, since the filters can be cleaned, they will save you money in the long run.
The G37 uses 2 air filters and they are $30 each at the dealer or $25 for after market.
Two K&N filters are about $120 US / $160 Canadian. After 3-4 years of use, the K&N filters are paid for and SAVE me money.
As for nitrogen in the tires I get the "econo 78" nitrogen.... you know the 78% version :)
@@MotorvateDIY all air cleaners as lons as there clean stay with your normal Filter bugger K,N Filters are over priced and change you air cleaner oil filter and will have no trouble ( hope)
@@goldwingman1500 I've used K&N filters buddy. They are better than the cheap paper ones. And in the long run it's lower in cost.
Great visual on the graphs
Hey hectoronthemoon,
Thanks for your kind words. Since I am learning Adobe After Effects that gray only took 3 days to organize the data and animate.
All just for you :)
If you stuck on the included K&N sticker it would of added an additional 15hp
Hey DoomFinger511,
BUT, if you do that, then everyone will know and no one will want to race you :)
all the sooks comparing prices and other sooks crying about maf sensor etc, im just here buying a new k&n each time mine gets dirty, self oiling never turns out like factory pre oiling.
Hey Kemal Keza,
You just might be on to something here. BUT since my pockets are not a deep as yours :), I just need to be VERY careful when oiling them and spray less then you think you need.
I live by this. I throw out used ones no matter what! They are junk when used after 50,000 miles i wont lose sleep tossing it out
here's a secret, rip the filter out of your car and you'll gain more HP than anything they sell on the market! and its fucking free!
Nutjob Joe, I will do it if you do it :)
Actually some cars loose power without an air filter, if they have mass air flow fuel injection. When the air box doesn't have a filter, the air turbulence is much greater and confuses the mass air flow sensor. As a result, it does not provide the correct signal to the ECU and the fueling is incorrect.
Nutjob Joe You'll also toast your engine. I'm a motorcycle mechanic and have seen first hand numerous times how dirt in your engine leads to failure. Use an air filter, unless you have more money than sense and can rebuild your engine whenever it shits the bed because of dirt in the combustion chambers.
It definitely gives you more horsepower I put into all my cars specially performance cars I will definitely see the difference and you could gain anywhere from 5 to 25 horsepower depending on what type of car it is and if you run Royal Purple in your car and you put it on a Dyno 100% you'll gain 15 horsepower all my buddies put Kane in in Royal Purple and older vehicles in mine and we all have Beemers Audi S4 GTRs and Lambos and it works and when we run at the tracks All We Do race fuel with royal purple and K&N air filters and Porsches and that's all we run
K&n ruined my mass air flow sensor. Over time, the oil comes off the filter and up into the air intake, and I did not over oil this thing. Also, I noticed you can see holes through the filter, kind of like looking through a screen. I'm sure it has better air flow, but does not work as good as a filter.
I understand what you are saying about how easy it is to see through the K&N filter, it does look like it is full of holes! As for the ability to filter the air, I will be getting my used oil analyzed this will and will have a look at the results. (typically silicon (sand) is high (> 30 parts per million) if the filter is not working well. I hope to change my oil this week and take in a sample.
I had a K&N cone filter on my 99 Maxima for just over 300,000 Km it didn't have an issue. I suspect newer cars might have more sensitive air flow meters.
I've had a K&N filter on my 2000 Nissan Maxima for 16 years, up until last year. I had a Blackstone oil analysis done and my silica levels were in the 100's. I changed back to paper recently, in the past 6 months, and will do another oil analysis to see if the silica drops, which I think it will. I don't think it's adversely affected my car, although I did have to replace my mass air flow sensor like constatbuzz above. I have since, in the last 2 weeks, given my Maxima to my 15 year old son and purchased myself a 2013 G37xS. I'm ecstatic...
Wow, 100 PPM iv VERY high for silica! (sand). The next episode (March 3) I will be showing my used oil analysis of 6 months with a paper filter vs 6 months with the K&N.
Sorry, I miss spoke about the silica levels. The number is actually 26, with 14 being the average so they are still high. I was trying to figure out how I could post my report but haven't been able to just yet.
Those are much better silica numbers. It is my understanding anything under 30 parts per million (ppm) is OK. It will be interesting to compare my 6 month used oil analysis with the K&N with yours.
I have switched all my vehicles to K&N filters. They make a seat of the pants difference in my GM 8 cylinder engines.
I feel the same... It isn't a lot, but it is a little different in a nice way :)
I’m a little confused on the numbers. With the K&N filter you got an average of 300 hp? Why then if you look up the stock hp on a g37 it says 328 hp? And you can’t really compare the two numbers because the stock runs were at 6,600 RPM and the K&N filter runs were at 7,000 RPM. I don’t know too much about cars so please correct me if I’m wrong but if the cars at a higher RPM it’s obviously gonna produce more power. How can these tests be accurate? And why are the numbers much lower than the 328 hp stated all throughout the internet.
Hey Levi Stephens,
Good question.
You should read up on "wheel horsepower" and "engine crankshaft horsepower"
The G37 has about 328 HP at the engine's crankshaft. That is measured with a engine dyno.
Since I didn't want to remove the engine to dyno it on an engine dyno, a chassis dyno is used. This measures the power at the wheels. As you can guess, there are power losses (friction) as the torque goes through the transmission, driveshaft, differential, wheels and then gets to the roller where the power is measured.
Typically, about 12-15% of the engines power is lost before it gets to the wheels.
This is an extremely optimistic dyno. I don't know about those dyno results. I've never seen a g37 make that much torque at that low of an rpm and lose power at 7000 rpm's stock when that should be peak.
Hey Patrick Kudom,
You may be right about the dyno... but I have just reported the numbers that it showed...
However, I do plan on getting the car dynoed again at a different shop with a hub dyno. I will compare new K&N, used K&N, new Nissan filters, used Fram filters and no air filters.
PLUS I will be monitoring differential oil and manual transmission oil temperature, and air intake differential pressure. It should be interesting!
Thanks for your comment :)
Hi, I live in Brazil and I have a 12/12 nissan tiida, I acquired a sports air filter (national), with the high performance polyurethane foam material, it has in theory the same kind of k & n maintenance, we use for the process neutral detergent and after washing, we greased the same mineral oil (Vaseline). I did the maintenance of it already 3 times, in the last I exagerei in the oil and my car came to give the light of engine anomaly, code (sensor maf p0102). From the first moment I thought that I had damaged the sensor, however I did the cleaning with a clean electric contact and now working and apparently the engine seems more round (obs: in the cleaning I saw that the air box also had a lot of oil and I cleaned it too she). As I had this problem with the oil exagerate, it is justified that in maintenance we have to be careful and not exaggerate in the oil, otherwise the maf sensor would certainly have suffered, over time.
What about MPG? That's what many people would like to know.
I don't know and haven't tested for that.
In theory, since most vehicles made in the last 15+ years have an air/fuel sensor, a different filter shouldn't change fuel consumption as the target air/fuel is very close to 14.7 under light to medium engine loads.
In the old days of carbs, a dirty air filter would cause a rich fuel mixture and fuel economy would drop.
I like this guy straight to the point no bullshit
Hey Guivensthecar guy,
Thanks! Once the funds are in place, I will be going back to the dyno for a re-test. BUT this time using brand new Infiniti filters, used K&N and even no air filter. It should be interesting seeing what the data shows!
@@MotorvateDIY alright
Love the white G37s. Was looking for one with black leather and manual transmission rwd. Can't seem to find the manual transmission for the sedan.
Hey jolmeaki,
Thank you! The interior is a surprising amount cooler in the summer as well.
The 6 speed manual Sport sedans are very hard to find. Keep searching, they are worth it!
I don't understand where all your dislikes came from. I thought it was a very nicely put together video and very informational.
Thanks for the comment. As I have found out, talking about K&N filters is a controversial topic and opinions are strong and very divided.
All I wanted to do, is to show the results I got... and I have :)
I thought it was common knowledge that KN air filter are less restrictive compared to stock. It's why the oil is needed, to catch the fine dust particles. I have one running in a 5.0 super charged V8 and I just did a clean and re-oil on mine to find not one bit i dust in the air tubes leading into the super charger had been let through. These air filters work if oil and maintained correctly.
We have the same experience... They work for us :)
Got one in my 2019 Mazda3 hatchback. If it gained 7whp, it's worth the 50 bucks. The noise alone is worth it because the Mazda3 is engine bay is so insulated. Cork Sport sells an intake system for $200. It's a short ram which draws in hot air and makes 5-7whp. I bet the K&N with the stock box is just as good or even better since it draws in colder outside air.
so if that's really true then is it really necessary to get the whole Intake K&N Kit? on my Mustang GT? can't i just get a Drop in Filter and get a slightly more throttle response? that's all i'm really looking for...or should i get the whole K&N Kit
Hey rhampton1914,
I know from my testing, the factory intake on the Infiniti G37 is very good. It has two air filters and throttle bodies for a 3.7 v6 to allow good airflow.
I have no idea how efficient the factory intake is on your Mustang. However, I would think someone must of done a similar test of before and after.
Wow! Thanks for the video. I think I’ll skip out on CAI and just buy some filters and achieve similar if not the better performance!
Plus I won’t have to worry about sucking up water!
In many cases, the stock intake is well designed for air flow and designed to handle heavy rains.
When I see a cone filter behind the grill, I honestly worry about what can happen in heavy rain to that engine.
Old video but this is insane! Thank you honestly. Been wanting the filters just didn't know if it was really worth it.
Hey adrian castillo,
I do find it hard to believe that was almost 4 years ago!
AND those same air filters are still in my car and haven't been cleaned yet.
Have a look at the 50,000 KM update from last year:
K&N Filter Test… Two Years and 50,000 KM Later: Motorvate's DIY Garage Ep.34
ua-cam.com/video/7D9lJxQ1s-U/v-deo.html
@@MotorvateDIY thats awesome! Definitely my next purchase👍🤙
But I rarely run my engine over 3500 rpm so whats the point. At highway rpm, there's basically no difference between paper and cotten. Seriously though, who's running their engine at 4500 rpm for an extended amount of time??(other than race car drivers) It's a total scam
Hey Happy Hands,
If you don't run your engine over 3,500 then you are right, this filter won't provide any performance gains.
For me, once in a while, I do enjoy wide open throttle acceleration, shifting gears at 7,500 RPM.
I want to believe this so badly! After checking out all these videos showing the actual computer screen of the dyno after installing high flow filters compared to paper and it did not show those amount of hp increases. It showed just around 5hp. Any thoughts?
Hey sk8punk318,
Were the videos you watched testing a G37?
Different cars (actually different engines) will have different gains.
The engine in the G37 is a VQ37VHR and it is designed to make power at high RPM (7,000!) and this means that is must move a lot of air.
That is part of the reason for the dual throttle bodies... to reduce the intake restriction by about 18% (en.wikipedia.org/wiki/Infiniti_G-series_(Q40/Q60)#2005_and_2006_refreshes)
If you want to know exactly the power gains for your car, you could buy the filters, and dyno your car before and after to see what the results are for your car, at your elevation with the fuel quality available in your area. I would love you see your results!
The only flaw I can see was we have no idea how old the stock filters were. Maybe a new stock filter vs a new K&N would be better.
Other than that great content.
Hey 01GTB Daily,
You are 100% correct. For some reason I didn't think about that when the video was shot.
I do plan on going back to the dyno for a re-test with a brand new Infiniti filter, used, K&N, dirty K&N and just for fun, no filter at all.
I should be very interesting!
If you read all the comments you would have known they were 1 week old.
Hey William Scott,
If you are talking about the paper air filters, I really don't know how old they were, since they were in the car when I bought it.
There were a little dirty, but not dirty enough for them to need replacement.
Looking back, I really should of used a new Infinti Filter... BUT I will fix that when I re-test the air filters on the dyno again.
Does a no-filter perform bettee than k&n?
Hey B P,
The answer is vehicle dependant. Intake design and ECU/PCM programming can impact the result.
Last September, on my G37, I dyno tested 4 different air filters as well as "no air filter".
The "no air filter" dyno runs resulted in less power.
Without an air filter, there is much more air turbulence and the mass air flow sensor(s) can't get an accurate reading.
All details will be on a future episode :)
Ya I never seen anybody claim this much power from a k&N maybe 5hp but close to 15whp hard to believe on a non turbo car.
I understand... I was also surprised by what the dyno showed.
Maybe I should dyno the car again on a different dyno to re-verify...