The Ford Barn

Wmurphy@whmcontractin · 08-06-2020, 06:31 PM

Hey guys, I have a 51 8ba with a 4” crank, bored .060 over, and 8rt heads. I bought the heads at the same time but don’t know the history of them. I have 130-140 lbs of pressure in cylinders 1-4 and 110-120 lbs in cylinders 5-7. I did the tin foil balls thing in the cylinders on the 5-8 side and it seems to have .025 piston clearance with the head tightened down with no gasket. I’m thinking if I mill .020 off the head and use a copper gasket I should be around the .050 you guys talk about. Do you think that will get the right side to match the left side.

Ol' Ron · 08-07-2020, 08:44 AM

Find a set of EAB heads and mill them for .045 clearance. I have a set of them on my 280 engine and get 160lbs with EAB cam as well. Engine torque is unbelievable.

Wmurphy@whmcontractin · 08-07-2020, 10:13 AM

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Thanks Ron, I guess there is a difference in the heads that just milling the 8rt heads won’t accomplish the same thing?

08-06-2020, 06:31 PM	#1
Wmurphy@whmcontractin Junior Member Join Date: Dec 2015 Location: LongIsland NY Posts: 22	8rt head milling Hey guys, I have a 51 8ba with a 4” crank, bored .060 over, and 8rt heads. I bought the heads at the same time but don’t know the history of them. I have 130-140 lbs of pressure in cylinders 1-4 and 110-120 lbs in cylinders 5-7. I did the tin foil balls thing in the cylinders on the 5-8 side and it seems to have .025 piston clearance with the head tightened down with no gasket. I’m thinking if I mill .020 off the head and use a copper gasket I should be around the .050 you guys talk about. Do you think that will get the right side to match the left side. __________________ Wmurphy 51 pickup Last edited by Wmurphy@whmcontractin; 08-07-2020 at 06:52 AM.

08-07-2020, 08:44 AM	#2
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,985	Re: 8rt head milling Find a set of EAB heads and mill them for .045 clearance. I have a set of them on my 280 engine and get 160lbs with EAB cam as well. Engine torque is unbelievable.

08-07-2020, 10:13 AM	#3
Wmurphy@whmcontractin Junior Member Join Date: Dec 2015 Location: LongIsland NY Posts: 22	Re: 8rt head milling Sponsored Links (Register now to hide all advertisements) Thanks Ron, I guess there is a difference in the heads that just milling the 8rt heads won’t accomplish the same thing? __________________ Wmurphy 51 pickup