Gear Ratios Options

[BonzaiCelica]

I was wondering what the purpose of the final drive gear ratio?

also what is this? http://auctions.nengun.com/item/k113042803

[BonzaiCelica]

thanks edophus. So do you think the gearing for the 3rd and 4th gen 3sge are perfectly matched to the engine? I noticed that the type r and rsx have high final drive gear ratio about 4.7 as apposed to the s54 having 4.176. Then again, you said it helps to increase torque, and we all know honda's vtec engine design has no torque whatsoever.

[Edophus]

thanks edophus. So do you think the gearing for the 3rd and 4th gen 3sge are perfectly matched to the engine? I noticed that the type r and rsx have high final drive gear ratio about 4.7 as apposed to the s54 having 4.176. Then again, you said it helps to increase torque, and we all know honda's vtec engine design has no torque whatsoever.

yeah, but being serious the honda's have a higher rpm ceiling, you have to think about gearing in relation to the engines power band, so with the stock rev limiter of a 3s-ge at 7400, if it has a final drive of around 4.7 but otherwise stock ratio's the car will be neutered in terms of performance because although you've increased wheel torque, you've chopped off a chunk of gear speed, so having to shift much earlier. Without increasing the rev limit, the stock gear ratios are about right, maybe a little on the long side, but not bad, the spacing could be better, but thats just a compromise for road use. I suggest looking at mfactorys website, they have a great gear calculator, you can punch in differnet final drives, rev limits and wheel sizes etc to visualize how it all relates.

I actually have an e56, and one of those final drives you've linked above, but i am combining this with an 8000rpm rev limit, so i'm increasing torque to the wheels, but the increased rev limit means i'm only losing a few mph potential from each gear vs stock, so keeping it balanced.