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Old 04-23-2019, 09:18 PM   #8
86TOYO2k17
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Quote:
Originally Posted by incutebus View Post
eventually i'll go for e85 and go for around 320whp. what about at that power?
Choosing a proper FD is highly dependent on your power levels and your usage for the car. Like autox, track, drag, street pulls etc. if it can prevent an extra upshift in the straights or down shifts in the corners it may be a good choice.

Going from 4.3 to 3.73 your gears will be 15.5% longer, also the same amount of less torque multiplication from the gear. So whatever your currently topping a gear out at multiply by 1.155 and see what your new redline speed is per gear. You may find out you just made 5th too long /high of speed for your power and now it’s useless.

A 3.9-4.1 may be a better option for sub 350whp
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