Adjustable CAM GEARS - the basics you need to know
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- Опубліковано 23 лип 2017
- Here's a link to my adjustable cam gears (cam pulleys): technotoytuning.com/toyota/16...
Here's a video on how to use adjustable cam gears. If you install aggressive camshafts on your engine, adjustable cam gears become a must, otherwise the stock cam gears will be limiting the potential of your aggressive cams.
Adjusting adjustable cam gears or pulleys is super easy. Unlike stock cam gears which require the removal od a timing belt and valve cover to be "adjusted", all you need to to do adjust aftermarket cam gears is to loosen a few bolts and rotate the engine.
Cam timing is the position of your camshaft lobes in relation to your piston's position. Advancing cam timing on the intake cam means the intake valves will open earlier. Retarding cam timing on the intake cam makes it retarded *crickets sound*. Retarding cam timing on the intake cam actually makes the intake valve open later. However, since the 4a-ge engine is a dohc (double over head cam) design we can also play with the lobe separation angle.
You adjust the lobe separation angle by moving the cam lobes away from each other or towards each other.
Moving cam away from each other, i.e. increasing LSA results in:
Broader power band
Lower max HP
torque moved lower in the rpm range
maximum torque decreased
engine idles better
less chance of engine knock
piston to valve clearance increased
Moving cam towards each other, i.e. decreasing LSA results in:
Narrow power band
Higher max HP
torque moved higher in the rpm range
maximum torque increased
engine idles worse
more chance of engine knock
piston to valve clearance decreased
It might also be important to add that playing with the LSA has almost the opposite effects on a turbo vs. an naturally aspirated engine.
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You know you are an OG subscriber when you realize how far he's come and how different he looks with the new hairstyle. 💪🏾💯
Simple and informative video. One thing I would recommend is always use a degree wheel and a dial gauge or piston locator when dialing in your cams. These will tell you where the piston is in relation to the cam/s and valves.
I'm currently looking for the instructions on using a degree wheel
First video on this subject that actually explains how this works by SHOWING! Good Job!!
damn your very good in explaining what auto parts does seriously. after watching this i think i just got my master degree on adjustable cam gears. Thank you!! please make more video.
Learned a few things about adjustable cam gears. Thanks.
In my experience, l install the adjustable cam gear on the exhaust while the intake is stock. This helps me to understand my engine better to how l drive.
A couple of years ago I purchased the same cam gears, in the same color combo actually, and they have been great. Tightened them firmly by hand and no probs since. Incidentally these are probably the lightest on the market as well.
Car Dude Thanks for your feedback and pointing out the info on lightness, I didn't know that, it's a really cool bonus.
Do these adjustable gears even do mich on a single cam engine? Just asking cause if you were to for example advance the intake, you would advance the exhaust cams aswell, so idk if it would make much sense.
Would be awesome if someone could help/explain.
Great vid, thank you! I’m rebuilding an A11 MR2 with orig. 4a-ge bigport blue top.
T-VIS is the best. Don’t delete until you absolutely have to. I’m building a 2nd Gen 3S-GTE for that very reason. 350WHP with T-VIS is my goal.
Thank you 👍 glad I didn't waste the money on adjustable cam gears since I went with factory cams on my rebuild for my 2gdsm
This vid is gold!! Very clear and well explained.Nice job 👌
Thanks a lot mate!
Thank you so much for the great knowledge my dude!
I was just researching how these work and found this video.
love it, no BS and BG music to distract you lol
two thumbs up man!!
Very good video describing LSA👍 good job!
Very well put together video, as always. You deserve a lot more views/subscribers.
mrsabidji Thanks a lot man. Don't worry they'll come around eventually :)
I worked for a Alfa dealership in the seventies Alfa's had adjustable cam gears I used to do the dyno tuning we found with the alfette and guilette 1.8 and 2.0 if you advanced the inlet cam 3 degrees it performed best and that was the standard cams
Good info as always, and it's cool that you went with techno toy tuning cam gears, they have great parts for Toyota's.
Road Worthy Thank you. Yeah, techno toy tuning is a great company, one of the few left that still makes great stuff for the 4age. They have a lot of items I would love to get my hands on eventually :)
Although I knew a lot of this already, still found it useful understanding cam lobe separation angle and how it impacts engine characteristics in a DOHC engine. The Nissan RB26 has a HKS V-cam kit, which allows you to dynamically adjust cam timing on the fly, which allows you to have your cake and eat it too. Only problem is, it's a $4k add on.
Good lord! 😳 The power per dollar doesn't really makes it viable.
True, but at least you know you only have to buy it once 😁
In regards to using adjustable cam pulleys on a stock camshaft, its true that you don't get a significant benefit in performance. But what you do get is lighter cam pulleys which reduces the amount of force required to spin it. Hence less engine fatigue in the long run. Some people say why bother spending 200 plus for something not so beneficial to the car, my answer is usually because i can lol
Straightforward. Thanks.
T3 makes brilliant stuff ...have tons on my Datsun
Thank you! I like to verify my knowledge before making any alterations. I have been searching videos for just this video! Just for clarification. THANK YOU!
You're such a great teacher, thank you for this video man
My pleasure!
wow this is really good information thanks for the breakdown
Exactly what I was looking for. Ty.
Wow thanks for explaining that very informative
Thankyou! Very good explanation! 🫡👍👍👍
Hey bro it's always a honor to learn something new from you video's question I have a 7age 20v engine want to install some adjustable cam gears which aggressive cam shafts would you recommend
Hi, nas from Malaysia.. Great content, good info
My question, when replacing the timing belt which is the marking for both cam we should follow, tq
I didn't actually know you had blown past 10k subs! Congratulations!
Seems that DIY poly mount video especially did you proud. Is the channel helping pay for the hobby yet? :P
Nice video! Great basic explanation.
802 Garage Thanks a lot. The poly mounts vid and a couple of other how to diy vids did a big part of the job. I guess it is kinda paying for the hobby, but the problem is it's a really expensive hobby. I still finance the bulk of the stuff with my own money. Should have gone with model airplanes or something :) I'm considering a patreon account in the future to feed some of the bigger ambitions I have for this car.
It's nice when I went to this video working on my GZE.
Amazing content !
Your good at teaching
You made this very easy to understand. I finally understand why people buy adjustable cam gears after buying the aftermarket camshafts. Now I'd like to know is how would you know how far to position the lobe seperation angle before the piston and valve clashes... Just feel it?
Lime Glad the video was helpful. All aftermarket cams come with a recommended LSA. When it comes to pistons hitting valves because you set the LSA too tight, by the time you feel it, it will be too late. The proper approach would be to check piston to valve clearance during engine assembly. Also spin the camshaft a full revolution with the piston at TDC and record the camshaft angle when the valve and piston make contact, you will then know the limit to which you can play with your LSA.
I want to replace the vct stock stuff in my dad's 99/ 2.0
Escort. Is that a good thing.? Thanks.
This is why VVT was invented, it's basically cam gear(s) that the ECU can adjust on the fly, giving you the best of both worlds.
You can't have vvt on older engine so yeah we need cam gear for cheapest vvt...
I have a question. My car is a Hyundai Tiburon v6 2.7. My tuning details are simple air intake tuning, exhaust tuning, and ecu mapping. And cam is an OEM condition and other remaining maintenance is OEM. Is it okay to install an adjustable cam gear in this state? Is it okay to do without re-mapping the ECU if it is fitted in?
very cool and to the point thank you
Have you degree'd your cams? It would be great to have some content of this for the 4age!
crikey you look different without the long hair. good videos, very informative. how about a video on engine mapping basics, in particular the colourful software map graphs (not torque/power graphs) and how the inputs affect things?
Very informative, thanks!
angel marcelo Thanks for watching. Glad you found it useful :)
11:06 pure gold :D
He did quite well on the sound👍
Toyota 4efe has got only one pulley, so if we move the cams on the gears one tooth, that will be okay or is to much? I just ask because if I fit one adjustable pulley once you move it , it moves both cans.
You drew a happy face 😂😉
Hello. VVT pulley is dead on my silvertop engine. Rattling noise. Is replacing it by adjustable cam pulleys a solution to maintain midrange power?
I have never seen anyone adjust cam gears like that there is more simple ways of doing it by Justine the camshaft itself not rotating the crank
Will I get more power out of my stock cams on stock ecu if I lower the cam angle
In the case of the 20v 4ag if I am interested in just adjusting the exhaust cam 3 deg. Would I just loosen the bolts on the exhaust side only and adjust or otherwise? Thank you sir. Enjoyed the information quite much.
Exactly. If you're adjusting only the exhaust cam, loosen only the exhaust cam, i.e. the cam that you're adjusting.
Im not a mecanic, so let me ask. This justble cam only ajust the intake and eksos? Only give you better gas milage? Do it gives more HP?
Oh Shit first.. hope the engineering shop gets back soon:)
Yay first! I'll update as soon as I have some feedback from them. They were kinda swamped when I brought the engine over, but they promised to give me some info this week.
If you mill the head for maximum compression (Lima engines) you have to have and adjustable cam sprocket
tom ashton True. Thanks for adding that, it's useful info.
Toyota 7 A fe 16 valves engine twin over head camshaft,can I install adjustable and will be setting
hry how are you doing i have a probelm with my 4age 16v engine it is not idling an when drivjng it shuts down when the car comes to a stop
Thanks for another video. Any news/thoughts on the rod knock diagnosis?
TheFlyingHat Engine is at the machine shop I am expecting feedback any day now. I'll be sure to update with a video as a lot of people are asking about it :)
12:27 do you use exhaust cam on intake in that engine?
Why does your intake cam have the worm gears for the distributor on it?
Quick question for the 4age . when you install adjustable timing gears where do you install the distributor? do you base it off the adjusted cam shaft or the crank shaft . or do you get it to stock adjustment then install the dizzy then adjust?
The distributor stays where it is. When you're installing the adjustable cam gears you're not moving the cams and thus the rotor doesn't move and you don't need to do anything to the distributor. The only thing you might need to do is verify and adjust the ignition timing the usual way if you make significant changes to cam timing with the adjustable gears.
Is there any video in making about setting the camshaft with comparator tool? Great job on explaining LSA
+92bego I did that but I didn't record it. I'll try to make one when I assemble the engine this time around. In about a month or so I hope.
I am starting my build next week but when it comes to this i have a question mark above my head, main problem is that i have home made cam pulleys with no marks at all, but i will watch your video anyway when it comes up.
If advance intake cam what will take place with power ban
subbed!
How about adjustable cam gear on the 4afe ?
I get so much understanding from this who is watch this video cool
Sick video 🤟🏽🤟🏽🤟🏽
great man, thanks for the video, i also have a mr2 aw11 like you and now i'm going to disassemble to repair it, so about the video what is the conf of your cam gears?
cristian paolo corado cordero What do you mean by conf?
your cam gears configuration lobe angle separation about that, how is your car right now
so adjustable cam gears lets you hone in your LSA?
Yes, but only when you have a twin cam engine, the lsa is of course fixed on a single cam engine.
What’s is the best idle for big cam?
so I gotta ask what Bearings did you use on your first rebuild that ended up knocking? DNJ by any chance?
OEM Toyota, but bearings are not to blame. Fault was entirely mine.
@@d4a glad to hear you used OEM parts :D so what happened? I enjoy your videos by the way ... very informative and entertaining stuff!
Thanks, glad you like the vids :) i blasted my block to make it look all pretty. I washed it ocd style afterwards but blast media can't be washed out as it gets embedded in the metal and let's go only when the block warms up and expands. Learned that one the hard way.
thankyou.
How to reduce overlap with these cams
why not just turn the cam shaft instead of the crank shaft?
So I’m working with a Volvo engine that has a factory adjustable cam on the exhaust but vvt on intake. What is going on that causes it to have less knock when I retard my exhaust cam (essentially reducing LSA)? I have to run too octane because of the heat we have here where I live but I noticed I can take a bit more heat with retarded timing on the exhaust. Is it coincidence or would the intake vvt have a certain adjustment where it happens to work better that way? When I have knock it happens around 2500-3500rpm with retarded exhaust (very slighty) and 1500-3000 when it had stock cam timing? (I was running low octane back then) it have no idea if it’s been flash tuned or anything. It’s a 20V NA 5 cylinder with 10.3:1 compression. I do notice a large vacuum difference when I retard the exhaust cam. Feels a lot less than when I had stock timing so could it be that since less hot air is in the combustion chamber that it has less hot spots in the cylinder head? I’ve done several steam engine cleanings for carbon for the pistons. Could I be possibly having a inefficient stock exhaust header(it is tubular but very short distance having 5 to 1 collector)? I run a factory cat and resonator with 2.25inch stock piping until after the resonator it is 2.5inch where I took out the muffler.
What if your engine is a single cam and you add an adjustable cam pulley.
What will happen? What are the benefits?
When you have a single cam(SOHC) you just adjust the relation between both intake and exhaust valve openings and piston position only. When you have 2 cams(DOHC) you can adjust relation between valve opening and piston position individually between intake and exhaust(because 2 cams vs 1) but you can also adjust relation between exhaust and intake valve opening. This video already explains DOHC intake and exhaust relationship but did not explain the piston position(apart about warning of interference damage).
You need to first understand what the pistons job is and it's stages in a 4 stroke engine(2 stroke is different but 4 stroke is most common so I'll use this).
Stage 1(Intake stroke): sucking in air (default:intake valve open)
Stage 2(Compression stroke): Compressing air (default: both intake and exhaust closed)
Stage 3(Power stroke): igniting air and fuel mixture to produce power (default: both intake and exhaust closed)
Stage 4(Exhaust stroke): removing combustion waste(default: exhaust value is open)
I'm going to talk about non-turbo, non-nitrous, just naturally aspirated engines as Forced Induction is a completely different dynamic.
The piston and valves take time to move around. The intake vale doesn't fully open immediately to let air in, it slowly opens up and gradually allows more air in till it is fully open when it allows the most air in, then slowly starts closing. Same thing for exhaust and same with for piston(It takes time for piston to fully reach the top and fully compress the air).
High RPM Scenario:
Lets look at the ideal *high RPM* scenario in a non-interference engine(intake valves will never hit the pistons no matter what). You want the intake valve fully open to allow air to enter the engine as fast as possible while in the intake stroke, then have it immediately full shut when in the compression stroke and power stroke, then you want the exhaust valve fully open when in the exhaust stroke.
Note: About RPM high vs low, the higher the RPM the more air being moved and more air benefits from less restriction, bigger air pathways like bigger exhaust, bigger intake etc. Opposite is true for low RPM. So bigger exhaust = less low end torque, more high end torque. You can't gain in one without loosing in the other.
So a slightly closed intake valve as piston is in intake stroke (drawing in air) is better for low RPM performance.
Advancing cam timing for SOHC will make intake open sooner and exhaust close sooner(this is good for low amount of air at low RPM because of greater suction effect(think of thin straw and low effort to drink a small amount of water vs using a very large straw and high effort to drink a small amount of water). (Air and water share same fluid dynamics BTW).
Retarding cam timing for SOHC will make intake open later and exhaust open later as well(piston will be lower in compression stroke and have thus less suction but since there is more air flow it wont matter and a lower piston has more space for the air to fill, thus better high RPM performance).
TL:DR: SOHC adjustment allows you to change between more power up high or more power up low(less torque down low but more torque up high with *retarding* cam timing vs opposite where you *advance* cam timing).
Hello I had a question wat would happen if I run some cam gears that been degreed to another aftermarket cam and I want to use them on my set of stock cams wat would happen ?
You will likely loose power. Stock cams almost always work best at their stock settings.
well if u can make it on d same degree from your stock camgear it might work
I have a silvertop 20v, it uses vvt and a vvt pulley. Can I use adjustable cams on it?
You can but you won't have vvt anymore. Vvt is good, it makes sense to remove it only if you have a heavily modified engine, in which case it's a restriction.
That all need the cam data to setting
This is my first time being exposed to this information. Actually, I think there is no other video explaining this in such detail. What is a Dyno? So if your adjusters' timing is off how do you know which one is out of sync and even if you know that how much adjustments do u need to do. Should box exhaust and intake cam have the same angles. Like in your case if the exhaust cam is correct and set to two notches passed the marking does the intake has to be the same as well? Thank you. and I hope to get a response and be corrected either by you or another person interested in helping others.
A dyno is a device that measures a car's horsepower and torque output. You can google it for more info to see how it looks and works. Cam timing can't really be "off" (it can but it has to be an obviously stupid setting). It depends on what you're after, different adjustments have different results and impact on the power band. Maybe you want your max hp and torque at 4k rpm or maybe you want them at 5k rpm (this is just an example). When you buy aftermarket camshafts they all come with a cam card that tells you how they should ideally be set up and you do that by using a dial gauge in a process known as cam degreeing (you can google that too). But depending on the particular application you may want to do things a bit differently than what's on the cam card (this is mostly true for different types of racing). For the street you will likely just chase the cam card stuff. Intake and exhaust don't have to match at all, they are not linked and don't need to follow each other, you adjust them until you reach optimal power at desired rpm. This is the best I can do in a single comment, as this really is an advanced subject when it comes to engine tuning and does require a fair bit of accumulated knowledge on how an internal combustion engine actually works. Hope this answered your question at least to some extent :) Thanks for watching.
@@d4a Thank you so much for your reply. I did not expect such a fast response and I appreciate it. I think maybe I should have explained my case a bit better. I have a 2006 Mercedes E350. I took it to a dealer to check it out they said that my timing belt and intake cams are fine but my exhaust cams are out of timing and cost $4670 to repair it. I neither have that kind of money nor can I afford to sell my car. So, I began educating myself by watching videos like yours. Yours is very unique I must say. I learned that in order to check the timing of cams I must take out the sensors, turn the main pully to 305 degrees and look through the hole where the sensors were taken out from. Then I should see one marking per cam. If the marking is dead center of the hole then they are in sync. Otherwise, the timing is off. Again, according to the dealer's diagnosis, my timing belt is fine. So, I looked through the holes where the sensors were and noticed that the passenger side markings are right in the middle. But on the driver side the intake was again in the middle but the exhaust marking was way off and could not be seen. I finally saw it by rotating the main pully. I'm not sure how cams can go out of sync if there is a chain connecting them together or check if they need to be replaced or just synced with the others, nevertheless, If I have to replace the exhaust cam I don't have any problems doing. But I'm not sure if just replacing the cam is going to resolve the timing issue. I think there are more steps in order to sync its timing with the other three cams. The dealership told me that their timing must be adjusted with a microscope. I don't know how they are going to use a microscope on the cams. I do not want to race my car. I just want a clean running car that takes me to work and back. how do I go about correcting the exhaust cam timing with the other ones? I don't think to rotate the cam in a way that falls in the middle of the hole is going to adjust the timing because the exhaust camshaft would still be in the wrong position. Also, I noticed that eBay sales a tool called Camshaft Synchronizer Alignment Tool Kit (www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=Camshaft+Synchronizer+Alignment+Tool&_sacat=0&LH_TitleDesc=0&_osacat=0&_odkw=engine+dyno) If this tool is needed in order to align the cams then how could cams just sync their off-balanced timing automatically? There are also other tools for locking the cams and camshafts when replacing a cam. I will be grateful if you can explain this for me since I could not find any article that explains the timing adjustment after installing a new cam and I don't have the means to take my car to a professional. I am very handy and my intelligence is not below average. Again, thank so you for the time you afforded me. Kindest regards.
hell yeah
camshaft sensors and camshaft adjusters related ?? Because I was told my camshaft sensors need to be replace and camshaft adjusters.
No they are seperate
Can they get ajusted when engine is in the car, or do u need to take out engine to ajust or install them??
They can be installed and adjusted with the engine in the car. That's the whole point. I demonstrated with engine out because it's almost impossible to shoot the vid with the engine in the car.
@@d4a
Thx, i am a huge fan of ur mr2 content.. do you need new belt when u buy the ajustble cam gear?.. same size??
Same belt
I have a question about the initial install and setup of the t3 gears if you got time
What do you want to know?
I bought a set, and it came with this piece paper that showed tdc on the gears, the exhaust cam on the paper shows tdc 2 teeth in front of the adjustment marks.
I sent you a picture of the paper on Instagram
These pulleys spin the camshaft and the crankshaft in tandem and open and close the intake and exhaust valves?
Yes, but it's not the pulleys that spin anything themselves, combustion inside the engine is what creates rotation and the cam pulleys along with a small pulley on the crankshaft only ensure that the valves open and close at the right time in relation to the position of the pistons. Basically the pulleys are all about timing.
@@d4a Yeah the combustion spins the camshaft pulleys and the crankshaft into the gearbox.
The pulleys just help keep the rotations in sync right?
Im a subscriber and Im building a engine. I thing There was missing the "how to use a cam card for timming" like you are saying in your newer vídeo (120hp). Good work Stay strong
Where did you get your cam for aw11??
Catcams
dammm...the factory did all the testing of the cams,and you're missing out on that, having to re-do the whole thing ,with dial indicators,and a lot of test runs...
Techno Toy Tuning or "T3" for short is actually the tuning house that is responsible for building, tuning and maintainung Keiichi Tsuchia's ( "The Drift King") AE86.
They're largely regarded as the "go to" tuning outfit for all thing's Hatchi related locally in Japan.
From whatall I've read and reaserched on T3, They're just an outfit that loves 86's and are dedicated to keeping them alive.
Johnny Keller I think you got T3 and Tec-Art confused.
@@touge_cowboy Tec Art did the body and chassis but the engine by the TRD Jedi Master, later the cross transmission and rear diff by someone else...sorry if l got everything mixed up, my Japanese to English is shit.
Is it worth putting adjustable cam gears on a stock engine?
murry001 You won't really gain anything, other than maybe some practical learning experience and fun with the different settings.
I did the same on a stock 4G93 NA, it helps a lot when l swap the MIVEC head with adjustable cam gear on the exhaust.
@@princesssolace4337 heyy man we have the same engine, im planning to put adjustable cam gears on it, do u recommend it or not?
@@princesssolace4337 the only thing I've done to my build so far was replacing the stock throttle body to a 60mm throttle body, cold air intake, 2.5 inch exhaust system and 4-1 extractors.
I have a Honda dohc but do you think it's the same steps
Ashwin Sivaainkaran The basic procedure is pretty much the same. You just have to know the LSA you need for your cams.
Yeah it's the opposite like it's counterclockwise
+Ashwin Sivaainkaran Yes, that too. Honda engines spin the other way, keep it in mind when adjusting. Good luck :)
Normalise the sound please! Music is too loud.
Thats the inpiration of vvt i
The difference with your today’s videos !!!! Sound of trucks in the street !!!!
This was recorded in the garage with a cheap shotgun mic 🤣 I didn't know better. We live and we learn. Now when I shoot in the garage I record the audio separately at home and overlay it piece by piece during editing.
@@d4a Yeah, now they look just great !!!
Ha! I'd love to have 12k subs. ;)
J. Hunto's Garage It's not that hard, I'm sure you can get there sooner than you think. A bit of hard work and some good content never fails to attract subs :)
Dua dua dua pop p pop vrum
DANIEL CAZOE Exactly :)
Either grab your phone and set the suicide hotline number on speed dial or skip to 3:00 to avoid horrible music and unnecessary "blah blah blah".
YOU NEED TO ADJUST THE CAM NOT THE CRANK!
+Joe Laska I'm not adjusting the crank. I'm just turning the crank in order to adjust the cam.
BLblblblBllbblLBLlblLBlbbLBpP lmao
Too much talking, just go straight to the point
It's cam timing my friend not a recap of a reality show, I can't sum it up in one sentence and spoon feed short attention spans. It's a complex thing that needs some background and explanation.
@@d4a how about d series of honda adjustable cam gears
Well that's a SOHC, so your lobe separation angle is fixed into the camshaft, and when you adjust the cam gear you're always adjusting intake and exhaust at the same time.
@@d4a best degree for it?
That's like asking what shoes are the best to wear. When it comes to shoes it's all about the occasion, when it comes to engines it's all about application. There is no "best" degree, just like there is no "best" shoe. It depends on other mods, compression, your goals and desired power band. If you're trying to build an engine by asking people what's "best", you'll build a very big paperweight.
Dude pls get to the point