Hilux LSD Recommendation Please

[M_C]

With my new superpowered toy I am on the look out for a proper LSD for more drivability.

From earlier Lock diff horror/win stories thread I have copied some bits talking about how tightened preload on standard hilux LSD's are not the last word, or perhaps even a decent word on LSD and the super tight diff in at the moment is great for powering through corners, but not so flash with light throttle as the long drive in the country uncovered with the back end occasionally getting a skip on and corners being taken in bites.

 

After a bit of fettling and another tune I should be pushing around +180rwkw and attempting to get this onto the road as opposed as into smoke. The car will get a bit of a work out on tracks and hill climbs etc as well as road driving.

 

What sort of LSD centre would you guys recommend?

What sort of prices are they?

Where does one procure something like this?

 

Cheers

 

 

Ive got an lsd that has more preload than id like, and it makes the car drive like shit.
Should have bought a trd lsd not a silly cusco one.
Its on my to do list to swap it out one day... Sure as hell wouldnt want a locker.
Although, a locker is Probably still better than a shimmed up hilux diff that only has preload. Which is a strangely popular option. Worst of both worlds!

 

 

Can you shed some more enlightenment upon this?

Why is lots of preload bad for you? Bad for what type of driving?

I have hilux LSD that has been tighened in Escort. Sill a track car as its not yet WOFable, then Friday driver.

 

 

There are two contradictory scenarios that a differential is expected to achieve:

 

1: Allow the wheels to rotate at different speeds when turning a corner. Otherwise it makes the car understeer

2. Stop the wheels from rotating at different speeds when one spins up. For obvious reasons

 

With a hilux diff (or earlier Toyota LSDs) they just have clutch plates which are sandwiched together with a certain amount of preload.

 

When the preload force is overcome, one wheel can spin up as it pleases.

People shim them up, to make it harder for just one wheel to turn.

 

Soooo the high preload makes your car understeer (worst part of an LSD/locker) but then when there's still enough force to overcome the preload, you end up spinning up just one wheel anyway. Which is the worst part of an open diff.

 

So it's not only a bit rubbish but it's also very unpredictable.

 

The better types of clutch plate diffs have low preload, but then increases the clamping force as one wheel spins up.
So it behaves exactly the opposite way to a Hilux one.

 

My diff has got both a lot of preload and a strong additional clamping force, so it's pretty much a locker with the not hugely grippy tires I have on.
I think it's probably designed for drifting/skids more than much else.

KPR yes I can probably look at getting smaller shims in it or whatever. I belive there's a way you can rearrange the clutch plates to give less friction between them, and I think they can be changed to 1.5 way instead of 2 way as well if you pull them far enough apart. Heh.
It's got a bottle of friction modifier oil in there which helped a bit.

 

[kpr]

if you have the money,  trd  irs G code center.  needs some very minor mods to fit live diff carrier

[0fnsiv]

Air locker.......best investment money can buy........ Locked when you want controllability under power, and freewheeling for pushing around in the shed.....

[Spencer]

If you just want to race and not do skids skids get a torsen centre.

[M_C]

If you just want to race and not do skids skids get a torsen centre.

Don't think I can resist skids, on skid pan of course.

Why no skids with torsen centre?

[thegreatestben]

I had a GA70 supra with a torsen centre and it did fantastic skids.

Any one at richy's place that time will attest to this.

Torsen centre diff codes end with 9 eg G**9

[mjrstar]

this guy is supposed to be able to work some magic to improve ramp angles on hilux LSD's

 

http://www.raceenginesnz.com/Motorsport-Services.html

 

Also I have a home job shimmed hilux lsd in my starlet and don't have any problems with push understeer or it turning into a single spinner. it comfortably lights up both rears in 4th but that's not really the Diff's fault.

[kpr]

^ The diffs that Rae chap does, with the ramp mod are good. had one in the starlet for years.   but for a little bit more, you are better off to go with something like trd or cusco,  which are a better design. 

 

I hear some of the torsen diffs will open wheel if you start to lift a wheel?  cant say ive used one myself though.

 

shimmed hilux = locker.   all you are doing is putting a massive preload on the clutch plates.   if you don't preload clutches enough it will open wheel.  if you preload enough its basically locked.

[sr1600]

Good to hear some results

Have a mazdaspeed lsd in my rx and its awesome just point, squirt and steer. Have to be real careful on low speed corners to not give it to much boot as it will try and swap ends. How is a shimmed hilux going to compare?

Not to keen on single wheeler pealer as its much easier to steer with the foot.....