Topic: Lightest possible RWD differential and a tiny multi-plate clutch pack
I'm on a long-term quest to build something inane, and I'm beginning to source parts. Need suggestions.
One thing I need is an RWD diff. The ones I have on hand don't please me as they're massive cast-iron pumpkins.
It needs to be an IRS diff, preferably with unbolt-able axles, no lsd, and it needs to be (comparatively) featherweight. Naturally, aluminum casing is best. Also needs to be something fairly common, so I can source one at a scrapyard.
The second thing I need is a multi-plate wet or dry clutch pack/basket out of a common bike that's easy to adapt to a shaft coming in and a shaft coming out. Basket will sit on a 1" keyed shaft and the output shaft will be around 1.25" in diameter, most likely.
Those things will probably channel all of 40hp pushing a 1500lb car on 185-wide tires, so sturdiness is not an issue.