The Ford Barn

rarebike · 02-24-2014, 11:02 AM

I just brought home another Flathead with 8R on the heads, can someone tell me what this would have been installed in. tim in omaha

Flathead Dave · 03-07-2014, 03:24 AM

I believe it's a truck.

Walt Dupont--Me. · 03-07-2014, 08:36 AM

It's probably an 8RT truck engine. The only difference between that and the 8BA car engine is the 8RT has all 16 hard valve seats and 8BA only have hard int. seats. Walt

Flathead Dave · 03-08-2014, 03:10 AM

I just learned something form you , Walt. I had no idea about the valve seats.

Sid the Maineiac · 03-08-2014, 09:20 AM

Dave, I think Walt has forgotten more about flatheads than most people ever knew !! LOL .There's a wealth of knowledge in that noggin of his and we are all lucky that he shares it, along with a few others on here !!

1952henry · 03-08-2014, 10:23 AM

Sponsored Links (Register now to hide all advertisements)

Quote:

Originally Posted by rarebike

I just brought home another Flathead with 8R on the heads, can someone tell me what this would have been installed in. tim in omaha

These heads have the lowest CR for the late flatheads.

Walt Dupont--Me. · 03-08-2014, 04:28 PM

The best heads are the EAB heads , 52-53 Ford, small combustion chambers. Walt

green50 · 03-08-2014, 09:27 PM

Quote:

Originally Posted by Walt Dupont--Me.

The best heads are the EAB heads , 52-53 Ford, small combustion chambers. Walt

Are the 52-53 Merc EAC heads the same? Thanks

Mike B · 03-08-2014, 09:45 PM

Quote:

Originally Posted by Walt Dupont--Me.

It's probably an 8RT truck engine. The only difference between that and the 8BA car engine is the 8RT has all 16 hard valve seats and 8BA only have hard int. seats. Walt

Interesting (compared to newer times) as exh seats are hardened...I wonder why Ford chose the intake seats?

A few Lhead Mopars I took apart, were set up with hardened exh seats..interesting.

Ol' Ron · 03-08-2014, 11:39 PM

There is a time line here that fits MOST of the production. The early 48 8RT,8BA, 8CM had harden seats in both the intake and exhaust, by 49 the 6BA only had harden seats in the exhaust. Not sure about the 8CM. Most 8RT engines had hardened seats in both. In late 51 the EAB engine had no seats and induction harden exhaust seats. Now with this said, you never know where the block comes from after 60 plus years, even the factory made exceptions and there's always Canada.

JWL · 03-09-2014, 04:07 AM

No, the EAC and EAB heads are not the same CR. I have not seen a block with seat rings only at the intake valves. But, I have seen them with only exhaust seat rings and none at the intake, or none at all, or both holes with rings.

scooder · 03-09-2014, 05:12 AM

Here's a thing, I got a 99A here, seats on the exhaust only, no inlet seats. That don't seem to follow normal pattern, these earlier engines normally had both seats I believe.
I don't think you can assume anything with this old Ford stuff.
Martin.

02-24-2014, 11:02 AM	#1
rarebike Senior Member Join Date: Jun 2010 Location: OMAHA, NEBRASKA Posts: 258	Cylinder Head I just brought home another Flathead with 8R on the heads, can someone tell me what this would have been installed in. tim in omaha

03-07-2014, 03:24 AM	#2
Flathead Dave Senior Member Join Date: Dec 2012 Location: SOCAL Posts: 557	Re: Cylinder Head I believe it's a truck. __________________ "Some people are like slinkys. They're not really good for anything but they sure bring a smile to your face when they're pushed down the stairs"....

03-07-2014, 08:36 AM	#3
Walt Dupont--Me. Senior Member Join Date: May 2010 Location: Gardiner Me. Posts: 4,200	Re: Cylinder Head It's probably an 8RT truck engine. The only difference between that and the 8BA car engine is the 8RT has all 16 hard valve seats and 8BA only have hard int. seats. Walt

03-08-2014, 03:10 AM	#4
Flathead Dave Senior Member Join Date: Dec 2012 Location: SOCAL Posts: 557	Re: Cylinder Head I just learned something form you , Walt. I had no idea about the valve seats. __________________ "Some people are like slinkys. They're not really good for anything but they sure bring a smile to your face when they're pushed down the stairs"....

03-08-2014, 09:20 AM	#5
Sid the Maineiac Senior Member Join Date: May 2010 Location: Norridgewock,Maine Posts: 657	Re: Cylinder Head Dave, I think Walt has forgotten more about flatheads than most people ever knew !! LOL .There's a wealth of knowledge in that noggin of his and we are all lucky that he shares it, along with a few others on here !!

03-08-2014, 04:28 PM	#7
Walt Dupont--Me. Senior Member Join Date: May 2010 Location: Gardiner Me. Posts: 4,200	Re: Cylinder Head The best heads are the EAB heads , 52-53 Ford, small combustion chambers. Walt

03-08-2014, 11:39 PM	#10
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,860	Re: Cylinder Head There is a time line here that fits MOST of the production. The early 48 8RT,8BA, 8CM had harden seats in both the intake and exhaust, by 49 the 6BA only had harden seats in the exhaust. Not sure about the 8CM. Most 8RT engines had hardened seats in both. In late 51 the EAB engine had no seats and induction harden exhaust seats. Now with this said, you never know where the block comes from after 60 plus years, even the factory made exceptions and there's always Canada.

03-09-2014, 04:07 AM	#11
JWL Member Emeritus Join Date: May 2010 Location: Fitzgerald, Georgia Posts: 2,204	Re: Cylinder Head No, the EAC and EAB heads are not the same CR. I have not seen a block with seat rings only at the intake valves. But, I have seen them with only exhaust seat rings and none at the intake, or none at all, or both holes with rings.

03-09-2014, 05:12 AM	#12
scooder Senior Member Join Date: Jul 2010 Posts: 2,593	Re: Cylinder Head Here's a thing, I got a 99A here, seats on the exhaust only, no inlet seats. That don't seem to follow normal pattern, these earlier engines normally had both seats I believe. I don't think you can assume anything with this old Ford stuff. Martin.