hi, i have a g35 with greedytwin 6-speed manual, and i was thinking to change the diferential for the automatic diferential,i think my dif,is 3.67 and the auto in 3.33. the question is what are the benefits, the car will make more speed? for drag will be good? thanks for any help that you can give.

 

I am planning to go with a 3.3 once the engine is built.

 

This topic has been discussed quite a few times on this forum.

The 3.3 is longer gearing. It helps because you don't 'run out' of rpms in each gear. Like if your stock MPH in 1st gear is 30, then it will be like 32-33 with the longer gears. You will have a higher top speed potential, but the lower gears do not rev up as fast.

 

Do a search for threads started by me in this forum, I went into great detail regarding my 3.5 to 3.3 FD swap....

 

thanks for the info. alberto i read it and i think that i will make the change

 

Sounds good, how much power are you running?

 

alberto, right know i have on 50/50 mix of 93/116, 620 whp and 708 with a shot of nos.

 

You are def a candidate for this FD. Other than running slicks or wide DR's Id imagine you couldnt hook up until 3rd, maybe 4th.

 

thats right iam doing drifting instead of drag jaja!

 

3.3 FD for the manual tranny is almost mandatory for anyone running FI IMO... Definitely consider getting this done at those power levels.