not to sure on how the whole gear ratio works... need a little education in the subject can anyone help?

 

http://www.g35club.org/download/2006_coupe_specs.pdf

 

^This is from the FSM for the 2006 coupe:



Its simple, taller gearing will allow the car to climb through the RPM range in a shorter distance. I didn't have any major issues with a 3.7, not sure about 3.9 though. Your speedometer will also be inaccurate.

 

are you running a 3.7 gear ratio? what is you're acceleration like? do you have a manual or automatic ?

 

I did previously, but went back to the 3.5 due to traction issues. I have an auto and the acceleration was slightly quicker.

 

traction issues? traction issues in corning or on take offs? when you where running the 3.7 ratio did you ever think bout get a Differential?

 

550hp&tq is why I have traction issues. But, the 3.7 worked well when I was N/A.

 

^ 550 hp&tq! Damn! Out off a v6. Turbo or supercharger? 1000cc or 2000cc injectors? That some Serious power, stock is 280hp

 

twin turbo w/900cc injectors.

 

Did you have to rebuild the motor to handle that much power if not that's Pretty Impressive for a factory motor

 

Yes, built shortblock. I wasn't taking any chances with the stock internals. The majority of the mods are listed in my "garage".

 

I would to do the same to my g, I checked out you're garage atleset the pic you have of your g. I'm at the moment rebuild a 472 caddy motor from the ground up. What are your times on 1/4 and 8th mile

 

1/8: 7.7@95
1/4: 11.8@118

 

What made you choose the twin turbos and not the supercharger?

 

Not to answer for him but I know for me it was a fear of "getting used to it" too quickly because of the (relatively) slow onset of boost with the sc. SC is the safer option on stock internals- especially for the AT where you're looking at protecting a tranny as well

There is also a rather detailed thread on going to the 3.7 and some of the hurdles. I know a lot of NA / boost guys swap 3.3 for 3.5s so it's very available for a very reasonable price. 3.7 may need a bit more money. I can't remember which section it is but if I find it I'll link to it if you haven't found it already.

Might be this one...

I'd also be taking a very hard look at an aluminum driveshaft- or CFif you have money to burn. Transgo upgrade is a must... I would hit those two items with a 3.5 before I went to a 3.7 but that's just me.