Auto Diff 4.3.1 Ratio Any Good For Drag

[17psi r33]

has any one done the auto diff in the r33 gts for use in drag as they run a 4.363 ratio and i want to know if its worth it and made any differance? im chasing first hand experiance with this one, did it rev heaps higher? did it gain much in acceleration? ect ect?

[PJ.]

It comes down to your tyre size and where your car makes power to. For me it was a big improvement over the 4.11's, difference is a couple of hundred revs @ 100km/h but was noticeable at the drags, whereas I used to cross the line not long after I shifted 4th, I was crossing right up near redline.

If you find you aren't right up the top end of your powerband in 4th, definitely do it.

[DVS JEZ]

Agreed. 4.3s was perfect for me too

[17psi r33]

nice thanks for the info< what time differance did it make in the 1/4 mile for you? i have done a best of 11.90 at 120mph on street tyers with the 4.1.1 but as you said only just shifting to fourth, my car is making 400rwhp and next race ill be using 255/55/16 e/t streets (26inch) tyre from memory so hence why i was wanting to know if its worth it. how much of an rpm jump at 100kmh? not that i care really just wanting to know.

[PJ.]

It was definitely worth a couple of tenth with my setup, and I was running the 255/55/16's too, they are a pretty tall tyre so it is important that you put that 4.3 in. Trust me!!

See my first post for rpm jump @ 100km/h

[17psi r33]

thanks for that, what times where you running befor the diff change and what was the new et after? did you lose much mph at the other end?

[Nee-san]

thanks for that, what times where you running befor the diff change and what was the new et after? did you lose much mph at the other end?

How do you guys go about putting these diffs in a GTR ?

[WARLORD]

i have put 4.3.1 ratio in mine and am very happy can't wait to take it to the drags

pj. was 100% right