Rear ends and roadracing/autox

[XTCshri2222]

hey, I have been building my s13 purely for time attack and autox. Question is as standard i have a 4.08 open diff. I have gotten for free a VLSD J30 diff, cover swaped out all ready etc... it's the 3.9x ratio gear.

Now will i be faster with a open higher ratio 4.08or faster with a lsd and a slower lower ratio 3.9or is the gear ratio differnce to nominal to notice and make the lsd a clear winner?

[crackler]

I think it would depend on the particular track. A wide open course would favor the higher gear ratio, while a tight technical track would favor the lower gear ratio,

personally I would probably go w the LSD just for the extra grip.

But whats the worst that would happen, you swap to the j330, decide you don't like it and swap back. It's worth a try, imo. But I have never done a swap and have no idea how much work is involved, so take it for what it is worth.

[nismoautoxr]

Go with the LSD unit.The differance in gear ratio isnt worth all the extra wheel spin you get with the open unit,especially on tight autox courses.

Ricky-

[crackler]

Go with the LSD unit.The differance in gear ratio isnt worth all the extra wheel spin you get with the open unit,especially on tight autox courses.

Ricky-

QFT, I get wheel spin in fast sweepers, usally after a transion, in my miata. I am probably not breaking 100 ft/lbs to the wheels, and I'm on azenis.

[nismoautoxr]

QFT, I get wheel spin in fast sweepers, usally after a transion, in my miata. I am probably not breaking 100 ft/lbs to the wheels, and I'm on azenis.

.I still dont have an LSD and the car spins the frickin RR like crazy in the sweepers.

Ricky