Allis clutch

Here's a few pictures of a flywheel and clutch setup I built for my WC a long time agoe, I don't have a week to explain simple math or reading comprehension skills, but here's a rough description.

On the left is the one I built, floater plate and discs. I built it to fit in the bell housing with verry little modifications, trim the nose cone of the starter and trim the throw out berring carrier just a bit. I just thinned the clutch hubs and used thinner discs and pads, then did the math with the floater plate and made the step in the flywheel correct.

I had thought of useing an automotive pressure plate, building posts and useing a flat flywheel but it was going to be a lot of work to get the ring gear positioned and then figureing out and finding the right combination of parts to use. It's not that hard to make steel flywheels, I've made a few and with a few hours in the lathe one can have one. Maybe in a D-17 chassis one of the Ford or Chev pressure plate assemblies would be a better fit. On my new engine I'm useing a crankshaft from a completely different engine, a 5 main diesel application, and I'll have to build the flywheel also, so maybe a nice weighted clutch, we'll see.

You really can't tell useing it from a stock one, but it sure is nice to take off with. I can run the engine up in RPM, tighten the clutch, bend the throttle over and use my clutch pressure to regulate the engine RPM. I try to take off around 4500 RPM and let it come up from there, no I don't have a governer, just direct linkage to the carb.

I put my engine togather and will try to get some pictures of it up next week and a description of parts and work as well as a few pictures of my 5 main setup.

On the right is a stock setup

Looks Great....Awesome work marty...

Really nice clutch setup, I was thinking about adapting a 7.25" stock car clutch, but I like your setup better. If you are turning 5000+ RPM I am suprised that the flywheel is still in one piece.

The flywheel is made from a big chunk of billet, the dimensions are a bit different than a stock one. The clutch face is slightly closer to the crankshaft flange, it's slightly larger diameter . I had to jiggle things around for a while and figure out where to position everything so that it would all fit easily.

When I got done makeing the flywheel it took 2 small divets made with a 1/4" drill bit to balance it, just a verry small amount. But the pressure plate was another story. I just got a new pressure plate from A&I products for my "stock class" engine and it came "balanced". We balanced the flywheel and then put the pressure plate on to check it. It wasn't terrable better than most but it was far from perfect.

I wouldn't try running a stock cast flywheel much past 3000 RPM, to many potential issues. I do run a stock pressure plate, but the cast plate in it is encased in a pretty good ring of steel.

if anyone is interested, I'd probably sell this clutch setup at the end of the season

I'm just guessing that my engine will lay down at some point this year, the crank is tough shape and the block is busted up. It's going to get pushed harder with some new improvements. My new engine that I'm working on uses a crankshaft from a different engine application (diesel) and I'll end up with a completely different flywheel and clutch setup.