Who knows how they work?
I'm planning a small cube, high RPM project, and looking to remove some reciprocating weight from the rotating assembly. I would rather not lighten the stock flywheel, but will if I have no other options. It's a tight budget project, so aluminum probably isn't an option.
In no way budget friendly, but they bolt to a flex plate, I think. As little reciprocating weight as you will find- that 4.5 is inches of diameter.
http://www.racingclutches.com/view.phtml?f_cat=Clutch+Units+%26+Parts%3A+4.5%22+Clutch+Units
Depending on original application, you may be able to take up to 10 pounds off before you weaken the flywheel. The extra mass is there to make it easier for Granny to get the car moving, and to soak up some heat from the clutch slippage.
I'd take it to a clutch or brake shop and talk over your plans with them. Why brake shop? Because the same techniques and often materials are used to rebuild brakes and clutch discs.
These specialty shops of which I write are often found near the truck (over-the-road, heavy duty) repair shops. There's one neighborhood of Billings about 10 blocks square, that has an auto electric repair, a couple brake/clutch specialists, at least 4 big parts stores, 2 bearing stores, multiple frame repair shops, speedometer repair, small engine supply and repair, AND about 4 truck dealerships that do contract work and have big parts departments of their own. And 6 tire/wheel dealerships in the same area as well... I'm sure most cities have an 'industrial area': that's where you'll find your 'helpful' help.
I thought somebody here would have some ideas.
I'm thinking I might be able to fab something off the stock flexplate, or even use one with/without the gear to double it up.
What's the stock setup look like? How much power and weight does it have to deal with? Those little 4.5" clutches don't like heat and slip=heat, careful.. I'd go 7.5" at least on a 'regular car'
I'm not going 4.5. It's not in the budget. I'd like to use the stock clutch, and pressure plate on a super light flywheel, and I don't think aluminum is an option right now.
Ideally, it might be 130-140 hp at about 8500 RPM in a sub 1500 lb car.
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