Ok so I asked in DesertDogs' PBS clutch thread, but I'll ask it here also.. I'm going to run a PBS trans, with a V8 bellhousing; which utilizes an 11" OEM clutch platform...Trying to determine what flywheel weight to go with.. There are several options.. Obviously the VW platform used in the mendeola's for many years works.. So what weight, or weights are they?? and another question.. since the VW ones are smaller in diameter; would you need a heavier,lighter, or the same weight flywheel in the 11"; to get the same: launch, start, inertia, driveability traits?? Any knowledgeable input here? Thx.

I want to know also. Back in the day a 12 lb flywheel was the hot ticket for a VW. When I put my Subaru together with a 200mm Kennedy wheel it was significantly heavier due to the solid center needed to covert from Subi crank to VW wheel and adaptor plate. My car has no problems reving.
I curious what a lighter or heavier flywheel would do.

This site, and noone has anything to say?? This is a first!

I run the Kennedy dual disc 9" myself, but I just called a couple guys with Chevy bell housings ( they are at Glamis now) and one is running the McLeod dual disc setups - they use a 35LB flywheel which is standard with those. The other is using a Centerforce Dual friction for 98 Camaro with a center force flywheel 30LBs, said the flywheel was wicked expensive.
He has a PBS and had some issues with the throwout bearing, but once it was set right, it works great

Big question with lots of variables. In a nutshell though, to get the same traits ,you will need a significantly heavier smaller diameter flywheel to have the same stored energy as a larger diameter wheel. Stored energy is what launches a car and makes takeoff easiest. Less stored energy(lighter wheel) makes for faster revs at the expense of harder launches and ease of takeoff.

Heavier is not the whole story. Mass at or near the center does little to store energy. Mass added at the rim makes a huge difference. What I'm saying is that total weight is not nearly as important as to where that weight/mass is located.