The Ford Barn

Mart · 02-24-2023, 03:31 PM

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

blackforty · 02-24-2023, 03:39 PM

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

cas3 · 02-24-2023, 04:07 PM

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.

Pete · 02-24-2023, 05:17 PM

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.

Mart · 02-24-2023, 06:00 PM

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.

Veeder · 02-24-2023, 06:52 PM

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Nice Work!!

cas3 · 02-24-2023, 06:56 PM

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.

Pete · 02-24-2023, 08:24 PM

Quote:

Originally Posted by cas3

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.

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

cas3 · 02-25-2023, 12:46 AM

"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

Ol' Ron · 02-25-2023, 09:27 AM

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

02-24-2023, 03:39 PM	#2
blackforty Junior Member Join Date: Dec 2016 Posts: 10	Re: Redrilling a Flathead Ford Flywheel. 11" to 10" clutch. nice work making use if what you've got available to you.

02-24-2023, 05:17 PM	#4
Pete BANNED Join Date: May 2010 Location: Wa. Posts: 5,423	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.

02-24-2023, 06:00 PM	#5
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 9,088	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.

02-24-2023, 06:52 PM	#6
Veeder Senior Member Join Date: Dec 2012 Location: CT Posts: 405	Re: Redrilling a Flathead Ford Flywheel. 11" to 10" clutch. Sponsored Links (Register now to hide all advertisements) Nice Work!!

02-24-2023, 06:56 PM	#7
cas3 Senior Member Join Date: Jan 2011 Location: Beverly Kansas Posts: 5,301	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.

02-25-2023, 12:46 AM	#9
cas3 Senior Member Join Date: Jan 2011 Location: Beverly Kansas Posts: 5,301	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

02-25-2023, 09:27 AM	#10
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,985	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