Now this is fun.
Had a wavetrac installed with my stock 3.07 final drive (installing the ESS TS2 in a few weeks, should still be able to use first gear with that ratio) and a Z4 finned diff cover. The finned cover probably isn't necessary since the wavetrac doesnt have clutch packs generating all kinds of heat, but what the heck, it looks cool.
Well now my car grips the road like a mofo. From a standing start in the dry, I could drop the clutch at about 3k RPM and I"m breaking loose a wheel and not really going anywhere. Now, its raining out so its wet, and I'm having to rev up to 4k RPM and dropping it in order to get even a slight bit of wheel slippage... car squats, rear shifts out ever so slightly, I hook up, and I'm gone.... in the wet.
The difference in traction is quite surprising to me. I mean, I knew a LSD would help, but didn't realize just how much I must have been slipping a wheel before now. With both rear wheels chomping down, the car just launches.
And in the corners, there's just power, all day, at any time.
I'm very pleased.
I'd still like to test the one-wheel-zero-traction lock solution that the wavetrac is supposed to address, but I"m not sure how I'm going to test that without some snow or ice... suggestions welcome.