4.08 Final Drive = OMG
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I have a manual . Before the install I would cruise 60 mph in 6th gear at 2100 rpm after install 60 mph in 6th gear at 2300 rpm . So not much difference.. This car pulls so much harder now through all gears . I can hang and even beat american muscle off the line. Of all my NA mods I wished I did this one first ..DOMO
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Here ya go:
Originally Posted by hasemanr
I was wondering what are the negatives with adding the 3.917 gear with a 350z that has a turbo? I was planning on getting the turbonetics kit and the gear will there be problem? Please help this final drive thing is pretty new to me.
traction will be more difficult
turbo power already comes on so quick, giving you less time to react to throttle inputs
it will also give more opportunities for the turbo to lose its spooling with more shifting
since you'll be flying through gears faster, you won't be keeping the turbo fully spooled as long
gas mileage will also obviously be worse with the 3.9 too
IMO with a turbo, stay stock FD or go 3.3 after you reach 450-500whp, though it can depend on how good your tires are if the 3.5 or 3.3 is better
I was wondering what are the negatives with adding the 3.917 gear with a 350z that has a turbo? I was planning on getting the turbonetics kit and the gear will there be problem? Please help this final drive thing is pretty new to me.
traction will be more difficult
turbo power already comes on so quick, giving you less time to react to throttle inputs
it will also give more opportunities for the turbo to lose its spooling with more shifting
since you'll be flying through gears faster, you won't be keeping the turbo fully spooled as long
gas mileage will also obviously be worse with the 3.9 too
IMO with a turbo, stay stock FD or go 3.3 after you reach 450-500whp, though it can depend on how good your tires are if the 3.5 or 3.3 is better
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Joined: Nov 2007
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From: Gilbert, Arizona
Side effects are that your RPM will hang a bit higher at all times and if you have a lightened clutch/flywheel it can be taxing to drive especially at low rpm.