For auto-x I would recomend staying away from the viscous lsd. I have an R33 skyline VLSD and well its nice but not what I consider to be "awesome". I would say go for a quaife diff. Perfect for auto-x grip driving. Read a little about it here  http://www.sportcompactcarweb.com/pr...cc_projslivia/
quick excerpt
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This is why Quaife prefers the term "torque-biasing differential." Put both tires on pavement and go around a corner, however, and if the engineers who picked the gear angles did their jobs, the gears will send more torque to the grippier outside tire in just the right proportions to keep the inside tire from spinning.
I don't really care about burnouts, though, and a Quaife will give all the grip needed at the launch of our one drag racing attempt. After that, if I still have a job, it's all about handling, and that's where the Quaife has the advantage. Driving style has a lot to do with what kind of differential you prefer, but I prefer a car with neutral, predictable handling and a smooth, progressive transition to oversteer. A clutch-type limited slip will tend to be more aggressive in locking the two rear wheels together under acceleration. With both wheels trying to go the same speed, the car will try desperately to go straight. That means understeer.
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R.H.D s13-->T04E RB20DET
Wangan Stylez Super Stars Team
Last edited by OPIUM : Oct 27th, 2005 at 01:05 AM.
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