Can Gearing Make Your Car Faster? With Proof!
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- Опубліковано 8 лют 2025
- Test Results From Swapping Final Drive Ratios In My Honda S2000
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I swapped the 4.10 final drive ratio in my Honda S2000 for a 4.44 final drive ratio LSD. Does this actually make the car faster? To test, I did three second gear acceleration pulls before and after installing the new differential.
Variables Before & After:
Gear oil used, 75W-90 vs 75W-140
New differential pinion and ring and pinion gear (may not be fully broken in).
60 deg F for 4.1 testing, 67 deg F for 4.44 testing.
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I love how you clear up commonly asked car questions with the math as opposed to giving a biased opinion based on your personal car setup. Your explanations makes questioning what to get for my car a much easier process. Appreciate your work!!
Very happy to hear it, that's the goal!
Pretty much what I was thinking. I bought an S2k last week - I have different problems to sort out than Jason, but once they're fixed I can see this being my next major upgrade/alteration. The first upgrade being sticky tyres of course - Engineering Explained for the win.
@@Jake22J Hi, Jake, hope you are well. Are you still tuning your s2000? I am thinking to change the final drive, was checking on UA-cam, and saw this
@@xiaozhuyou7817 I am well thank you. Unfortunately the S2K is a bit dead right now. I had other stuff to do to it like fix the roof, then the drive shaft went, fixed that, but that was followed very quickly by an engine failure. So it's been sat there while all this lockdown has been happening.
It's finally due it's fix this month, and I'm still intending on changing the final drive - however to the less aggressive (and easier to find in the uk) mx5 one.
I'll keep you posted lol
@@Jake22J Are you based in UK as well? wow, I guess you are a member of S2KUK. How many tooth in MX5 one?
I went from 3.73 to 4.181 and it was very noticeable. Top speed gearing went from 185 to like 168 from the math I did, but I can't remember the last time I ever went 185 on the street..
I went from a 3.07 with top speed of 193 to a 3.73 with a top speed of 173, mileage also took a hit. My speeds are not done by the math but actual speeds (drag limited) of real cars that are similar. I wish the math displayed the mileage difference as that may influence if you really want a gear change.
SkiDooRydr i doubt your car was aerodynamically capable of 185 anyway. But i'm sure with a little bit more wheel torque, it can get to 168 just fine. Ideally we could replace the overdrive 5th or 6th gear, but a new diff gear is much cheaper..
Here in Germany the top speed decrease would be a problem ;D
Well considering I am making almost double the horsepower the stock internals were designed for I'm not exactly worried about that, but yes I would imagine slightly more wear if I didn't maintain the car.
I calculated out the rpm difference for each gear and the reality is I only see about 300 rpm difference at 70mph on the freeway. I suppose if I wanted good gas mileage I would just drive my daily driver.
Take your pick:
- For US residents, the highest speed limit in the United States is 85, and this is a very small percentage of the roads (mostly rural southern areas). In most states if you were caught driving 160mph you'd get jail time.
- 185 in the 1/4 mile would be like a mid 7 second 1/4 mile. Most people aren't daily driving 7 second cars.
- You are increasing your acceleration in all gears so thereby reducing your 1/4 time.
- You'll potentially see better lap times on a tight road course as you come out of the corner.
- Faster acceleration without needing to raise power at the motor. Reduces risk of blowing the motor especially on stock parts.
This is Engineering Explained, not 1320video. Why would anyone realistically need to go 185mph on the street?
That editing to get the numbers to appear on the whiteboard with a finger snap was really clean. I had to watch that 3 or 4 times
Haha, glad you enjoyed!
Benissocoolike at first i thought it was just a very smooth jump cut. But looking at it like 100 times it seems it wasn't a jump cut at all.
+M P I did at first too. I'm pretty sure it was a fade into an image overlay, and then the cut less than a second afterwards was the "jump cut". That would also add reason to why he took a step back before using his magic fingers, to guarantee his hands won't get in the way of the shot.
It turns out way smoother this way though and looks really good.
Benissocoolike that is exactly what i thought!
my guess would be that the numbers were always there and he just put a white overlay over them until the fingersnap.
Really appreciate you making these videos man
So glad you made this video. I changed the final drive on my R34GTR from 3.45 to 4.11 and I'm really pleased with the results. Sadly I did not even think of getting any timings of the acceleration difference but I was certain the car felt a bit quicker, now I can rest knowing that it is quicker :D
+5% more g force ---> +5% bigger smile
U got that right.
Willian Melnechuky Sorry, your math is wrong. G force isn't equal to smiles. Smiles are squared. 5% more G force = 25% more smiles
Christian Haffner 5% more = 1.05 times more
1.05^2=1.1025
So you smile ~10% more
I think your math is wrong
Dion Rest ..it was a stab at humor not remembering that the fans of this page are more educated. If I would've though 2 more seconds before posting, I would've seen the error in my ways.
Christian Haffner okay, it can happen
Where was this video when I was looking for a final drive upgrade? Took me months of reading through forums to get similar info found in this video, haha!
Glad to know you finally took this approach! More of these kinds of videos please! More not so popular? ways to make your car better!
This UA-cam channel is a must watch. I deal with whiteboards all day at work and for some reason I can stay awake watching yours. It is amazing seeing the diff. gear ratio on a s2000 compared to my Charger RT. Even though the 0-60 difference is within 1 second, the fact the Charger has 2.6 gears really shows the engineering behind effectively delivering power.
Keep making vids dude you're doing a great job.
We used to run a 3.89 cruisin gear, (1970 Mustang) then bump to the 4.56 on track day ;-) That 351 cleveland engine HATED the 4.56 on the highway !!! And you could hear the carb's secondaries open, which meant your gas gauge would drop quite quickly... The early 80's seem like a century ago... Love your video's :-)
I'm a brazilian mechanical engineering student and I love your videos, bro! Thanks for sharing your knowledge in a fun and easy way.
You are my favorite person on UA-cam. Thank you for all of your awesome content!
Very kind, thanks for watching!
Consistent quality.... one for my favourite channels! Especially since I just bought an AP2... finally! So glad you bought an S2000, I follow regularly. Considering intakes and test pipe among my first upgrades for mine, which is bone stock.
Congrats. First thing you must do is remove that clutch delay valve... google it!
gutspraygore or get an ap1 slave ( that's wat I did )
That has to be the most efficient and well presented analysis I have seen!! Thank you keep up the great work!
my dad worked at Chevy a little after the oil embargo in 1975. he said that Chevy 350s were sucked of so much power they made only around 160hp, but their torque was still there. he made differentials in the assembly line, and said they put more aggressive gearing to compensate for the engine; a faster top speed in 5th gear and a better acceleration in 1st.
in the late 70's nothing was making any power... my 302 was rated for ~140; it sounded the business and had the torque to light them up, but it wasn't going anywhere.
ronindebeatrice yep my dad's z28 was the exact same
Great video. I have a 2002 Q45. It came stock with a 2.76 differential. In 2003 they made a few performance improvements, one of which was changing the differential to 3.13. I'm considering swapping it out to the 3.13. This video shed some light!!
Watched again. Thanks!
protip: if your car is slow but you want to feel the g's mount the passenger seat backwards so its facing the rear and sit in it while having your friend slam on the breaks at like 60mph.
LOL
Accelerate Your car at reverse gear to maximum speed and press hard on brakes later on
Lol funny
One of the reasons I keep watching these videos is your ability to outline and account for as many testing variables as possible in these types of evaluations.
Thanks, happy to hear it! I worked as a test engineer briefly before committing to UA-cam full time.
Great video! I went from a 5 speed and a 4.3:1 final drive to a 6 speed with a 3.9:1 final drive on my MR2. It's my daily, lots of highway, and it dropped my revs at 70 MPH from 3500 to 2800. Great for a car with no sound deadening, and 37 MPG is nice too. I did lose some acceleration but gained an LSD.
Just watched an old video on how speed is affected by gearing! Gear 1 highest torque but low speeds. The difference in video/sound/confidence/ preparation is massive way to go!!
singlehandedly the best UA-cam channel. perfectly explained should be the name. You make learning/teaching fun! thanks EE!
I was severely geeking out on this while train commuting this morning. Very well done.
I could never get tired of watching your videos. It's so awesome that you can explain something like this so we can all understand it clearly. Thank you for all your work, and keep it up with the awesome videos, Jason.
One of the first things I did to the 1963 C10 I’m building was rebuild the 60 year old 3.08:1 open diff to a 3.73:1 posi. Can’t wait to feel the grunt of those lower gears!
my friend and i did this in my car the other day for testing purposes as i am getting my Z tuned soon. the results were surprisingly good. i wrnt from 10 to 60 in about 6.5 seconds with all-season Michelin tires.. i know from experiance that Z's so not achive WOT until you reach 45mph, so it not getting all of the power available. with that being said, im sure after the tune (stickier tires as my TCS went crazy after 35mph) it could do it under 6 seconds easily.
good videos brother, keep'm coming.
Oh you made it into it's own video! Sorry about my last commenting about that on the install video! Thanks for doing this! :D
I see why the Spoon chose the 4.44 gear ratio and 1.75 way LSD on AP1/2. Thanks for the informative and systematic explanation.
Jason, this is like the first technical video that actually kinda made sense to me. Kudos :D
Even for a daily driver the 4.44 would work if you live in East Europe, because there aren't many highways around here.
Now if you live in the mountains it would also benefit you, because of the curvy mountain roads you can't go too fast and some extra wheel torque would help on the way up.
n33niki that setup will work on Orlando, FL. highways are packed, so you basically drive on a city in a ~25 miles radius.
n33niki where he is in Idaho he gets the best of both worlds
That's a good point!
I learned how to mess around with final drives and their effect on acceleration in drag racing games as a preteen. Shorter gearing is fun for spirited city driving and fast acceleration bursts, this is why Evos and STIs with their rally style gearing seem to go really hard with only around 200whp, they lose out pretty badly on top speed.
I've been thinking about changing the final drive in my Evo. But opposite, I need longer gears now that I'm making 500 HP. Wish I could rev to 9k RPMs though.
I put 4.88 gears in my truck over 4.10 factory. Mostly to correct for larger tires though. It was a huge help and made it a ton of fun to drive when paired with a supercharger.
Oh man almost cried a bit when I saw you plug in those numbers at 4:33. Remember watching your very early videos, I'd always skip ahead when you're filling a giant chart manually lol. Great video as always💪💪💪
When I saw the difference in the revs, I kinda wished you went for the 4.77 as well . The 4.4 is an improvement nonetheless
great video. one of my favorite yt channels. great explanations with good supporting facts.
learning more stuff everyday
thanks man I really appreciate these vids
Fantastic video as always! I am glad to see your analysis method is the same as what I use. I think you made a good choice with the 4.44s; it should still have the best 0-60 time. I'm jumping from 2.73 to 3.55 myself this summer. Right now, second gear carries me all the way to 85 mph, so I got room to step up the ratio. Should be a lot of fun!
New subscriber, I’ve watched a few of your videos prior to subscribing. I am an engineer by trade, so your approach to explaining the data is relatable for me. I’m currently in the process of a gear change, I simply used a online calculator to come up with my gear ratio swap, but wanted a deeper understanding so this video was perfect for that. Thank you for taking the time. It does sound like we are similar in that you did the math and second guessed, after the swap you wished you would have went with the smaller gear ratio. We all do those things, but especially “engineers”. 😂
Great job in analyzing and testing. And proper math done.
The finger snap and numbers appear bit is classy. Well done. You have arrived! :-)
With the finger snap and number magic Engineering Explained has finally become The President. Excellent video!
Usually when you answer these I'm only vaguely following, so glad to see you smash a common sense topic that's not really up for debate with the math. If nothing else it gives some solid #'s to stand-on and justify the purchase. Thanks for that.
Love this info man so extremely helpful but I would love to see all the differences in full with the 4.7 final as well
please explain the beautiful snapping and crackling sounds that rally cars make so well. i start to drool when listening to group b rally cars. o and that noise the turbo makes, not the blow off valve but that odd sputtering sound as if something is slipping. you the man though keep up the dope vids
ryan p i dont know about the first thing (i dont really know what you are refeering to), but the turbo flutter sound is caused because when you let off the gas, you close the throttle body, and all that pressured air that the turbo was building has to go somewhere, so it goes backwards and slows the turbo down (it doesnt stop it completely though). thats why people install blow off valves and diverter valves, to reduce the turbo lag a bit between gear changes and to protect the turbo, but i dont believe its that harmful.
ryan p
I think the snapping sound you're referring to is antilag which I think engineering explained has covered.
There's also a ton of videos on here with various rally cars spitting, crackling and snarling their way across various rally stages :)
Watching you car jack surf at the end was awesome! lol Great addition!
Whoa! That finger snap magic!
great video. I had my stock s2k to 150mph once. it had more to give but I would not say there was much more in it given the road I was on and only having stock power.
would be interesting to see what the theoretical "fastest" gearing would be or if there is a formula to find it, I once had a car that took 3 gears to 60 and I found that pretty enjoyable to shift more even if it's slower
lol "what's fun for humans..."
Haha, sometimes my words could be a little more natural; spoken as if I were Spock observing earthlings.
Quick conspiracy: Engineering Explained is actually an extra terrestrial sent to enlighten humans with car physics
are you a vulcan?
He had ear surgery to blend in better.
Jake Ells Hmm... on second look, he just might be a child of mr. and mrs. Spock 👽😜
Great video. I am glad this is being put out there. I remember many Benz V8s with very tall final drives that essentially robbed them of their performance.
This is exactly what I've been needing to know, have 4.63 in my LSx 240sx and thinking of putting a lower gear in it since im building the motor up.
Always wanted to try 4.44's, good video! I had Kia Sportage sourced 4.77's in my AP1, it was really fun and felt great on the track but for every day driving at 70mph on the freeway the 4500rpm in 6th got a little old, with my AP2 I decided to keep the stock gearing but always wondered about 4.44's with the improved AP2 transmission.
Yep, I love the AP2 gearing, wish I had it in my AP1! I think tall 6th gears make a lot of sense, because honestly if I'm flooring it, I'm probably not in 6th gear at 150 mph.
Engineering Explained A taller 6th gear swap... Hmmmm, sounds like a future video to me.
Engineering Explained creates the perfect blend of car science with car enthusiasm.
Thanks for this video - last little push I needed to swap mine out 😆
I had a 98 Mustang GT, changed from 2:73 gears to 4.10s. Best bang for the buck and in California no worries about smog.
4:30, that finger snap is the BOMB lol
stock gears are the best becz they are design for long life and durability. and second thing from that the short the gear ratio of speed the more faster u can achieve the speed.
and also if u change the gear box with custom one that the engine need to work more hard the turbo (sometimes turbo failure),etc. So for that u need to do tuning and if it fails then buy a new one.
so parts to be changed.
blow off valve
turbo
valve timing
injector
spark plugs
cylinder head
ecm
also crdi system (as per the vehicle)
if not done this much change u end up some or the other problem like engine failure, turbo failure, cylinder head leak, vibration becz of injector, engine check which never go in ECM.
plz comment if u think its right or wrong. (if wrong plz explain)
One thing, that is a good upgrade if you don't want to touch engine parts and make it reach more power but. If you will upgrade your engine and make it get more power and torque you shouldn't throw away that final drive, It depends obviously how much more power would it reach. But in case the engine won for example 100whp you will need it(the 4.1 final drive) more than the shorter one. It's all about what you expect the car do. If you want to drift the 4.77 would be perfect.
Another thing. If you want to have almost perfect performance acceleration on each shift you'll have to change individual gears from the gearbox to keep the acceleration always near from the peak of the maximum power whiteout letting revs fall to much.
A short experience I had changing my final drive and gears more than 4 times while I was upgrading engine by steps. I started with the original (3.56) after that 3,76 with same engine, then 3,96 with little upgrades, then 3,76 with more upgrades and now I think will return to 3,56 or perhaps 3,37 that is the largest that exist for my car. Hahaha lol. That's only the final drive. From gearbox I changed 3rd and 4ºth gears shorter than original and 1st and 2nd longer with straight teeth gear(I don't know if it's call like that in English sorry LOL) haha well now I have to see the new performance how it is, the curve of hp and torque and see if I have to change some gears again. Well thank your vid, was excellent explained. Regards!
What might be even more fun would be to use very aggressive gearing like the 4.77 but also change the top gear so that it is the same overall gear as stock. That would give you 5 very aggressive gears for playing and for increased g force, but still have your low revving top gear for cruising at highways speeds. That way you have the best of both worlds. Actually with the lower 4.77 final drive, if you shift at the same RPMs as you normally would with the 4.1 final, gas mileage might remain close to the same as stock if you drive not so aggressively. But the main point to a greater reduction final drive is to increase the fun factor. Been there done that.
I did similar runs back in the day when I ran the 1/4 mile, only my constant was distance, not speed. I ran the 1/4 mile in 13.32 seconds at 112 mph with a 3.90:1 gear ratio.
Changing to 4.11:1 gear ratio had me going 12.96 seconds, but I actually went slower, at 108 mph. So I got to the end of the 1/4 quicker, but not faster. Try explaining that phenomenon to people and their heads turn sideways.
Awesome video. Thank you for putting this up. It also puts the tire video into perspective.
Great video! Always watch it twice in case I missed something! And I seem to understand it better ! Thanks !
I agree with what you said - I just wanted to mention that in a real acceleration run (where you change gears the calculations are a bit more complicated. You elegantly avoided that by keeping all the testing in second. You see there is a point that the stock car is using a a lower gear than the car with short gears. At that point the stock car has actually more torque at it's wheels. For example in your S2K between 60-68 mph acceleration the stock car is using 2nd gear while the 4.77 is using 3rd - so the stock car would have an advantage - would that be enough to change the outcome of the race? Probably not but the difference wouldn't be as great for the lower geared car.
Good presentation !
I think there's a sweet spot for each car depending on the power/torque curves of the engine and how many gears you have available... ie. you want to remain at peak torque for each upshift since the cars horsepower will determine your top speed.
If your car only has 5 or 6 speeds, then a lower ratio diff will definitely improve acceleration with a small increase in fuel consumption.
But if you go to the extreme of having too many gears like the 10-speed auto in the new Camaro ZL1, you'll end up being slower around the track than a 6-speed manual, because the gains achieved in keeping the engine rpm high with each gearshift are negated by the time taken for the extra shifts required to reach a certain speed. (if that makes sense)
This is why even hypercars today only use 7-speed gearboxes.
I love looking at modifying a car in "smile factor" increase... Thats the way it should be right ? If your a professional driver , thats something else... but 99% of us are not, and never will be... There should be a smile factor index chart ! Great video, as usual...
yes changing the tire size is also like modifying gearing....but the acceleration or top speed that you want may not give you a look that you want
You said that from the calculations, you wanted to use the 4.77 instead. You could use slightly-smaller-than-stock rear tire diameter to effectively increase the final drive ratio that little bit more...
bruh you read my mind every time. love the way your brains works (yes im also complimenting myself. ill take it. :P )
I too would take the aggressive ratio for more fun in the canyons, though it would be nice to pair this swap with a 6th gear swap (to a smaller 6th gear) to get back some of that highway fuel efficiency, but thats basically the cost of a transmission full rebuild :O
went from. 3.23 to 3.73. 0-60 went down from 5.4 seconds to 4.4 seconds but my top speed is down. I never did a top speed run but there is about a 350 to difference in each gear
What kind of car? I have a 01 camaro with built motor and trans and 2.73 gears so first goes to 60mph! And its still fast af... wondering how much faster 3.90 gears will make it
@@TrumpWonGetOverIt tire spin. Unless u running wrinkle walls and got weight transfer setup really good. Go for low 3.?? Ratio. Also are u done adding power? The more power/ torque you have the more you will want that taller final drive. Also tire height are you going to run a taller tire like a slick. That will give you a taller final drive and need to compensate for it.
@@everythingbox sold that pos Camaro lol. But i got 393 gears and it helped a good bit. 4 speed auto sucks for daily use especially on highway
it would be nice if you do some 1/4 mile testing times too.. with new tyres vs old, new diff, etc..
what is next? coilovers, exhaust?
MSD
Maxi Biscardi the whole point was to get consistency, 1/4 mile times are not very consistent. Plus, even in Idaho, it's not easy to find areas to pull a quarter mile run on public roads and he doesn't have a track. Plus I don't think the drag strip near him has opened for the season yet.
that's true, they do not have the consistency of their tests, but will be a nice data to have anyway.
i didnt know that there was seasons for drag tracks, but taking in mind the weather there makes sense(i'm from argentina)..
levi leitaker not legally
yes, but you will not do it public here, knowing that he has 1.2m subscribers..
I really like almost all your video , love your work 😍
If you did a Hondata K-Pro ECU mod or even just a flash, that would give you Vtec much sooner and you would love the car even more. It's almost a night and day difference in feel.
Top gear is meant for fuel economy on most cars. Top speed will be drag limited rather than gear limited. You might even gain top end by fighting that drag with more torque. I have however seen V8s screw up the launch effectiveness with too low a rear end.
if your changing your tire size the Equation to figure out the Diff Gears is (old ratio*new tire/old tire) so Example of that from my Truck, stock tire size is 245/75/r16, so 245=30.4" Gear ratio=3.73 New tire size 315/75/r16, 315=34.5" (3.73*34.5= 128.85/30.4=4.233) therefor i need to install 4.23 gears which they don't make for my axle so 4.10 gears will work but probable install 4.55 gears to put larger tires in in the future.
I really like your video man! Even if I'm not so good in english, I can understand almost everything you're explaining!
Good job!
Also, I wanted to ask you if you could make a video that explain the SkyActive technology that Mazda has on their cars? :)
You have a video for all my questions Thank you!!!
I love how he rides around the floor jack that made me laugh.
How about a variable differential? CVT diff maybe?
Best of both worlds.
There are two speed differentials but usually only found in trucks.
that's the entire point of a transmission.. why would you want a transmission AND a variable speed diff? (i'm not talking about the two speed ones in the occasional truck)
Because you can have a fast acceleration diff and a high speed or high economy diff in one.
no, it likely couldn't. Sled cvt's are much bigger then a typcial diff in a car, and only handle ~180hp or so, and the belts need replacement every few thousand k's. A CVT transmission would do everything you want from a cvt diff, and be more robust.
If you want to swap between drag and highway gearing often, use a quickswap diff. That let's you change gears quickly and easily.
I love your videos, miss the STi days but that s2k is clean!!
Ha, the STI had amazing torque, but I don't miss it. :)
The rev limiter will likely have a "soft" limit 200rpm or so before the hard limit at redline. In this range it will progressively start dropping cycles to ease into the limiter.
Have you looked into an AP2 transmission swap? Shorter 1st-5th, taller 6th.
You are the Brian cox of the car world
Heard the same thing with trucks towing. Think it was the 2500 vs 2500hd. One had a different axle ratio and could pull more weight, but also cruised at a higher RPM so burned more gas.
i was just here for the proof for gearing but apparently magic also exists
Life's a mystery.
In my 5.3L V8, I briefly considered going from a 3.73 to a 4.10 but decided I had enough acceleration and wanted to keep somewhat decent highway mileage. 4.44 and 4.77 sure are some short gears for a street car! Though, obviously, it depends on what the transmission's gear ratios are.
@@doctorunicorn5550 Yep, I saw it! Thanks for the response.
Most people doesn't know to change final drive can improve a lot acceleration, I think change FD and LSD can improve your lap time a lot, plz don't supercharger or turbo at first time, it will screw your car, even slower on the race track
I remember telling my friend to change his gears if he wanted to go faster, he thought I was an idiot, can't wait to show him this
Good video. Math and science is what makes the world go round.
the 50-60 time doesnt really matter because you rarely ride it out to redline anyway, so the advantages of the more aggressive gears are pretty big in the part of the rev range you spend the most time.
It's interesting that the attitude toward ambient temperature changes with power. When you said 67F vs 60F I assume that the higher temperatures will give you more traction, thus greatly negate the increase in oxygen. This is probably only valid with enough power to break your tires lose much of the time from 10-60.
nice upgrade! how much u spend to get that 5% g force boost?
You should do one about maximum acceleration with your car by flooring the throttle, and only use clutch to keep the engine at 8000 RPM. Even when shifting gears, keep the throttle fully open. There will be lots of clutch slip, but you will be lot quicker and g force.
Wish i had a garage :(
Archer There are many parking lot DIYers. it's possible. You just gave to be careful yo make sure people know you're under the car and make sure to use stands and all the regular safety.
And it would be good to have a roller bed because the floor may be hot or whatever.
Oh, make sure the ground is level
Don't have a garage, nor do I have a concrete drive. We do however have a shed full of tools for just about whatever you need. My dad and have done a lot just in the grass, if using jack stands just make sure you have a good base like a piece of wood. Just sucks not having a space out of the weather.
i go to walmart when i need to work on my car just go under the solar panels if they have them and be prepared with your tools anyone says anuthing just say you already called aaa hahaha but you should be fine i used to use walmart parking lots as a rest stop miata livin hahah
Jacob Hayes My driveway is made of dirt too but I have the tools to do anything.
Jacob me and my dad are facing the same thing. Tools for everything, even enough to build a house if we wanted, but no other space in his shop. Everywhere else is sand and grass, equally.
We've got wood, jacks, jack stands and wheel ramps though. He's even got a place for his tractor to pull it out and pull a vehicle under.
Still, it's not a garage or shop though. Ya know?
4/1 gear ratio will be better for drag racing, to prevent wheel spin, or even less like 3.9 or 3.7
I went from 3.73 to 4.56 in my truck, combined with a slightly larger tire size and it was definanetly noticable. I also didn't lose any highway mpg but gained about a one in the city
I would like to change from 3.27 to 3.67. Is there possibe to gain mpg in the city?
Hi EngineeringExplained,
Try shifting into 3rd at 7000rpm vs 8300rpm vs redline
another nice video Jason.
I think you should do a live video on Facebook or UA-cam...
thay would be cool...
The first gear is usually too short for best acceleration. If you can spin the wheels it means you could’ve chosen a lower ratio. So I would prefer something just above the limit (if say 4.50 witha 4.0 final is the spin limit I would go with say 4.60 first and 4 final drive). The final drive depends on the engine power. With high performance cars you can get to 60mph in first gear
Love the video, wish I could have told you before but 4.44 is ideal for an AP2 and 4.77 for AP1 gearing.
Very informative and clinical. How about some feedback on how you feel? Was it worth it? Or too noisy on highways?
4.44 gears are a good compromise between stock and 4.77. I'm glad you did the math on how these gears work for the rest of us S2000 guys. by tv's way did you get the yellow box thing to correct the speedometer speed reading?
Yep, I've corrected the speedo since filming this episode - should have a video on the correcting soon!