How to determine the ideal final drive ratio?

[Wildchildpr]

Hi:

I'm looking for information on how to determine the ideal final drive ratio depending of the track.


For example in the S event with the F40 in suzuka where you have to pass all other cars; The factory final drive of the car is something like 2.80:1. I increase the number to 3.23:1 and notice the ovbious result, but my big interest is wich is the ideal number?????


I know this are popular and common numbers but how to know the ideal?
3.23:1
3.42:1
3.55:1
3.73:1
3.90:1
4.10:1

There is a reference book or a information table, handbook, ect...
Where you can calculate or determine the number ect.

I woul like to learn about this particular tunning.

Thanks for your time, my friends!

 

[Stevisiov]

There is no definitive perfect gear ratio, there are too many factors to consider. A bit of testing can find you a close fit though. Here are a few pointers anyhow.

1)First check your power/torque curve in your quick tune menu, look for a point on the hp curve just before it starts to drop back rapidly, this should be just after the highest point on the hp curve. mark down the rpm figure under the curve at this point.

2)Time for the car testing on your track. The rpm value you just found is the rpm value you are aiming to hit in top gear on the longest straight. It might take a bit of testing to find out what final drive gives you this rpm.

3)(only do this if your racing and not for a time trial)
Once you have this drive ratio, alter it to allow for an extra 10% more speed, this is so that you won't hit you rev limiter in someone's slipstream.

That's pretty much it. There is more too it than that, however this works great as a general rule of thumb 👍

Tuning each gear will be you your next objective

Hope it help.