Superformance MKII, Riverside Racer 289 FIA vintage race car

[1795]

Originally Posted by xb-60

Jim, your flywheel and clutch requirements would be way different to mine, however I'm about to spec a flywheel, clutch and HTOB, so I'm interested in what you will be using. Your gearbox is a Toploader and so is mine so there's commonality there. So too with the Quicktime scattershield, but the only other 'hardpoint' is that I will probably need to use an HTOB because of tunnel size limitations.

Cheers!
Glen

Glen,

I decided on a Quarter Master street stock clutch, as they are good to 500 HP and I am at 424 HP. I really have no need to go to clutch rated for 1000 HP. It is a 10.4" steel flywheel, I chose that one over the aluminum as it was only 1 lb heavier than the aluminum and I felt like it would last longer and the weight difference was minimal. I also am using a HTOB, as there is very little room for a clutch arm and it would have required a lot of engineering to make one that would fit right, which means a lot of in and out with the engine and transmission. The Quarter Master one for you would be the 721 series.

The Top Loader is a limiting factor for clutches. Very few manufactures make a clutch for the Top Loader 1 1/16" input shaft with 10 spines. Most are for modern transmissions with twice as many splines. I could only find clutches from Quarter Master and Mc Leod that would fit a Top Loader. Tilton no longer makes a clutch that fits a 10 spline input shaft.

Let me now what you decide, or if you are able to find someone else who makes a clutch that would fit a Top Loader.

Cheers,
Jim