is the ATB worth the big money over the standard ford LSD?

i was speaking to someone the other day who said the ATBs were good until you get past a certain amount of slip then they become useless?

Car is 480Kg ish, 07 zx10, what do you think?

Hi

The Sierra item is not really that good for use in a light weight car. The ATB works very well as it DOSE NOT promote under steer like some LSD units do.

The only down side about the ATB is that you need to keep both rear wheels in contact with the ground other wise it reverts back to an open type diff. Obviously this means that you need suspension geometry ride heights and damper travel all looking at. You certainly need to make sure that you have enough damper travel to allow the inside rear wheel to stay in contact with the ground with load on it when cornering hard. May also mean depending on exact setup that you could do with an anti roll bar to reduce the body roll.

Cheers Matt

Edit. Forgot to say YES

[Edited on 6/3/09 by procomp]

Having looked at the atb in action I'd say in the dry from a standing start it's woth 20 to 30 feet off the line against a plate type diff. (not sure about viscous). It does however IMHO and that of others leave a bit to be desired under wet conditions where we've noticed it to "push on a bit" in the corners for some reason. Quaiffe were asked about this at autosport 2003 and said we were not the only ones with this queire. I would say however that if I was to fit an lsd then it'd be an ATB as if offers the best of both worlds for a sunday run or a sprint/hillclimb as it does not lock up under low speed/grip conditions.

If you can afford it, go for the ATB. I had a torsen (ATB) diff in my mx5 until the input bearing failed recently. I now have the stock viscous LSD.

The contrast is amazing, apart from the odd clunk when reversing, I never really noticed the ATB, in the sense that I always had traction, very little wheelspin, and I could donut like crazy

After going back to the standard VLSD, I get way too much slip on the inside wheel, and its only a matter of time before I strip the old diff out and put it back in the new casing.

Sometimes you don't know how good something is until you take it away.

The only thing that is slightly better about the VLSD is its quieter when I reverse (The old one clunked and clonked like crazy) and that when not paying attention on slippery wet roundabouts, i get a lot more warning before the back steps out. (But of course, it steps out at the same point, just with less wheelspin)