Standard Lsd Vs Aftermarket On Gtr

[nedi]

I'm looking for feedback on whether to change rear LSD on r32 GTR to an aftermarket 1.5way or similar.

Car will be used "exclusively" for circuit racing/track days etc. (not road registered)

from what i've seen, its generally agreed front diff should be upgraded to 1 way or 1.5way of some sort, but it seems lots of people leave the rear standard. I'm thinking of changing the front to quaife 1.5way and whilst i'm at it, would like to know if this is a bad idea.

But Mainly, has anyone changed the rear LSD to nismo/cusco/kazz and if so was it better?

[nedi]

thanks heaps everyone, must be something everyone keeps secret, so that settles it then, i'll work it myself.

[GTSBoy]

3 days and you come over all snarky because no-one replies?

Point 1) It's not all hidden from you. Do a search.

Point 2) Quaife diffs are helical types. There is no 1/1.5/2 wayness about them.

Point 3) Generally the helocal diffs are a bloody good thing in the front, especially on a track car.

Point 4) If it is track only just man up and put a 2-way in the rear.

[nedi]

3 days and you come over all snarky because no-one replies?

Point 1) It's not all hidden from you. Do a search.

Point 2) Quaife diffs are helical types. There is no 1/1.5/2 wayness about them.

Point 3) Generally the helocal diffs are a bloody good thing in the front, especially on a track car.

Point 4) If it is track only just man up and put a 2-way in the rear.

Point 1: thanks for the reply, "quaife in the front, 2 way in the back it is", i wont have my manhood questioned.

Point 2: i didnt know it was meant to take 3 days, i thought nobody like me, my bad, sorry

[GTSBoy]

Point 2: i didnt know it was meant to take 3 days, i thought nobody like me, my bad, sorry

It's possible that they don't like you, but I wouldn't let that worry you. But seriously, your question had been asked and answered before, so a bit of passive ignoring by the crowd can serve as a lesson to use the search function just as well as the usual R31Nismoid post.

[R31Nismoid]

^ it's automated

Anyway you can just shim up the rear diff if you want which is what a lot of people do when leaving it "standard", or put an aftermarket centre in.

Most people do the front with aftermarket as the Nismo etc are stronger. Last thing you want is a diff to break and take the sump and god knows what else with it.

Depends on where you want to go with costs as to what option you pick. Shimming up will cost around $300-$400 if it's in good condition. So quite cheap.

[nedi]

on the track, when we are talking aboput rear diff, what is the BIG difference between 1.5way and 2 way, i here 2 ways are better for drifting but WHY?

its easy to get my car into power oversteer out of tight corners, it a nice oversteer that is progressive and easy to control and it doesn't seem to snap back and is lots and lots of fun, but this gets through tyres real quick,

which one helps the car hook up out of corners better and do either of them cause understeer

[dori34]

whats it drive like with a shim?

is it rattly on low speed turns/carparks like a locker?

[BLITZ-26]

depends on how many shims you put it....... mine is shimmed up with the biggest and its locked... jumps around chirps in car parks makes noises and generally attracts attention when trying to park yes you can shim it up to different values and acheive nice through to near locker like mine.

1.5 way = locked on acc so whenever the gas is on the diff is locked....... when you depress the acc pedal the diff will unbind and return to a half locked state hence the .5 (half locked)

2 way = locked on acc and then locked on decel so it is kinda the same as a locker HOWEVER if you ajust the acc pedal you can acctually make the diff release as the tourque plates the diff arnt bound togeather, these are good for drifting because they are predictable and you are spending most of your time drifting wanting both wheels to spin a condition that unbinds the diff (stock diffs unshimmed) will stuff your corner and well your day of drifting

2 ways are for this reason no considered good for the street to the untrained like a locker will induce understeer, and over steer and when down gearing or decel oversteer that usually scares people.

for the GTR i would think that a 1.5 way front and a 2way in the rear would be a good setup i have driven in cars with lockers shims kaaz tomei and nismos...... my pick of the bunch the tomei .... but cost value the shimmed stock diff is great

[nedi]

i dont think anyone has ever explained it that well, thanks,

is a 2 way in the rear likely to cause understeer?

[GTSBoy]

Any LSD, front or rear in any car will tend to increase understeer.  And the more LSD action in the diff the more it will do it.  So a 2 way is not necessarily going to cause more understeer than say a 1.5 way or a 1 way.  What matters the most is the breakaway torque at which the LSD slips.  The tighter the diff, the more understeer it gives.

Also, just a small correction to what Blitz wrote above. He said "1.5 way = locked on acc so whenever the gas is on the diff is locked....... when you depress the acc pedal the diff will unbind and return to a half locked state hence the .5 (half locked)".  What really is the case is that a 2 way offers LSD action on both accel and overrun, a 1 way diff only provides LSD action when loaded under forward acceleration.  A 1.5 way diff offers the same LSD action on forward accel, and some on trailing throttle too, just not as much as a 2 way.  And when he said "depress the acc pedal" he really meant "lift off the acc pedal".

Edited March 3, 2012 by GTSBoy

[RBish]

on the track, when we are talking aboput rear diff, what is the BIG difference between 1.5way and 2 way, i here 2 ways are better for drifting but WHY?

its easy to get my car into power oversteer out of tight corners, it a nice oversteer that is progressive and easy to control and it doesn't seem to snap back and is lots and lots of fun, but this gets through tyres real quick,

which one helps the car hook up out of corners better and do either of them cause understeer

2 ways lock on acceleration and deceleration