Redrilling a Flathead Ford Flywheel. 11" to 10" clutch.
 

In this video I take an English Flathead flywheel and redrill it to accept a 10" clutch. It also needed skimming slightly. In a separate video I will show the flywheel being balanced and the oil pan being modified to fit a French flathead block.

https://youtu.be/KdLi3hK0RYA

Re: Redrilling a Flathead Ford Flywheel. 11" to 10" clutch.
 

nice work making use if what you've got available to you.

Re: Redrilling a Flathead Ford Flywheel. 11" to 10" clutch.
 

Good job as usual Mart. This spring when swap meets start I suggest you keep an eye out for a model T transmission input shaft. They have the same crankshaft end as the A's and v8's and a nice long straight shaft to grab in the chuck. The flywheel is then mounted on the crank face as it will be on the engine for a true surface. Get two and you can bolt one on each side for a static balance.

Re: Redrilling a Flathead Ford Flywheel. 11" to 10" clutch.
 

No flathead Ford STREET engine needs a 10 inch clutch. A 9 inch will handle 300 hp. and is far easier on the leg when shifting a lot.

Re: Redrilling a Flathead Ford Flywheel. 11" to 10" clutch.
 

I did the job for a friend and he had already bought the 10" pressure plate. I don't have access to 9" pressure plates rebuilt with extra strong springs so tend to use the 10" ones myself.

Re: Redrilling a Flathead Ford Flywheel. 11" to 10" clutch.
 

Nice Work!!

Re: Redrilling a Flathead Ford Flywheel. 11" to 10" clutch.
 

The 9" in my jalopy slips if I floor it. It was new from FT Wayne back when they built in house. 59a motor with Merc guts, nothing fancy. Purchased too long ago to argue with them so I plan to take it apart myself and I suspect I will find springs weaker than they should be.

Re: Redrilling a Flathead Ford Flywheel. 11" to 10" clutch.
 

Weak springs.
The new ones we used to get from Ford worked fine.
They can be rebuilt with valve springs also.

Re: Redrilling a Flathead Ford Flywheel. 11" to 10" clutch.
 

"rebuilt with valve springs"...
good to know Pete. I do not have a spring tester, but a good friend who builds most of the winning motors on our local 1/2 mile dirt track does, and probably has buckets of springs

Re: Redrilling a Flathead Ford Flywheel. 11" to 10" clutch.
 

I try to use the 91/2 " pressure plate most of the time, but it doesn't fin the 1 3/8 early input shaft. I have an adapter that fits the crankshaft surface of the flywheel. Bolt both flywheels to it, and just transfer the clutch mounting holes. Bet I've done a dozen wheels
Gramps