Question. What Diff To Use

[25gtfour]

I have just bought a s2 stagea engine for my r34 gt-4 4wd manual but don't know what diff to use.

i have been told to use the na diffs which is 4.3:1

i have also been told to use the turbo diffs which is 4.11:1

so my question is what is the better diffs to use

the car is being used as a daily driver

[R31Nismoid]

4.11 unless you wanna be running huge RPM on a freeway even in 5th.

If you want outright acceleration then stick with the 4.3

It's a trade-off really.

[bluey33]

I just installed 4.3 and is shit on freeway. sits up just under 4,000rpm.

4.11 was much more suitable but went 4.3 so I can turn 3rd easier.(stock power) Will be running 4.3 locked on track days and 4.1 as daily. Only half hour job swapping 'em so doesn't bother me.

In short answer is 4.11 as Nismoid said

[KiwiRS4T]

The Stagea diff is 4.1 and your rear diff is 4.3 so you are going to have to change one. I would change the rear to suit the front so both 4.1

I would guess you now have more power than before so a slightly taller gear would be a good idea.

My Stagea with 4.1 diffs is doing 2700 rev/min at 110km/hr.

If I can find a non V-spec R34GTR diff I will be changing to 3.454:1 ( I have an RB30/25 with heaps of torque).

[25gtfour]

thanks i will use the 4.11:1 diffs

[Duncan]

unless you bought the stagea rear diff, you need to re-use your old front diff.

front and rear diff need to match