" Could you please explain what you mean here? I understand that in non-slip conditions, an LSD and open diff function identically. And assuming both tires have identical levels of friction (function of tire and surface), an LSD and open diff should perform similarly. But no two tires are identical, as are no two patches of pavement (or asphalt). An LSD should be able to provide some compensation for these variances, even at the strip, right?

I get that traction control attempts to do this by applying friction (brakes) to the spinning wheel. But won't the friction just further degrade performance? Isn't a mechanical solution to provide biased torque better/more efficient than a frictional one? "

" That's just it, though. I have no intention of doing drag radials, and that was part of the discussion with Cory.

Either way, I'll have imperical evidence at a later date. I'll do another run just before install, then immediately after.

@mramg1 , did the E55 driver you referenced have a factory LSD that he replaced with a quaife, or an open diff replaced with an LSD? "

" Already has. There were several Camaro, Mustang, etc. owners at MIR whose jaws just about hit the ground.

I anticipated a .2 sec gain until I spoke to Cory at Kleemann. He stated that, in his experience, it would likely be closer to a .4 sec gain with just a LSD. Since I'm going to do new downpipes and a tune shortly after the LSD, I should be deep in the 11's before Christmas. "

"
What?!?!?! I saw their transmission upgrade, but have never seen mention of an LSD for M278-powered C207. It's not listed on their website, either. "

" @Sticky , you asked for a new thread on this, and here it is. Link to Quaife's website below:
http://www.quaife.co.uk/node/3700 "