So, I understand that these gears are quite expensive. Besides the negative impact on mileage and not being able to hit 60 in the 1/4 mile (unless U have a raised limiter DE) has any one looked back since upgrading? Has anyone actually hated it and gone back cause of more shifting in NA applications? Seems to me the only setbacks are miles and price. I guess I'm just looking for justification to spend the cash vs the smile it will put on my face! Will it be a big smile? thanks

 

they have no effect on gas mileage fwiw (I've had them on my car since ~2005, and the car gets exactly the same miles per tank now as it did when the car was brand new)

they really make the car much more enjoyable

 

Moved...

 

i have this gear setup in my car and i am happy with it even in a twin turbo setup. It will make a NA car a little faster. That was original goal before i went TT. Not sure by what you mean hit 60 in a 1/4 mile?

 

Cannot reach 60 MPH in a quarter mile? How come?

 

yeah i was gonna ask the same thing. maybe he is pushing is z with the 3.9 gears in the diff.

 

i thought 3.9 was no advantage for FI?