The Ford Barn

jbrenek · 03-09-2011, 03:51 PM

Is there anyway with the head off the engine to tell if it is a high compression head. It does not have any marks on it or who is the manufacturer. Is there any dimensions for the depth of the flat area on the inside of the compression chamber that can be measured ? The head has not been planed.
Thanks,
Jim

dfish2931nc · 03-09-2011, 03:58 PM

Most high compression heads have a heart shaped combustion chamber. A stock head has a combustion chamber that is more square shaped.

Charlie Stephens · 03-09-2011, 04:03 PM

Jim,

Post a picture of the combustion chamber.

Charlie Stephens

TinCup · 03-09-2011, 04:49 PM

Check out this post and you will see a picture of a high compression head combustion chamber. Click Here

James Rogers · 03-09-2011, 05:50 PM

I have found that most of the original heads have a small bump or square in the casting just in the middle of the boss where the water pump mounts. Most all of the original cast iron parts have this bump. I have found them on the block, water inlet and outlets, water pump housings, crank pulleys and other original parts. If it has the bump, it is stock.

TinCup · 03-09-2011, 06:10 PM

Sponsored Links (Register now to hide all advertisements)

James do you know your booth number yet?

LukeDahlinger · 03-09-2011, 06:13 PM

The bump mentioned above may not be the most reliable method to tell. I have a stack of original heads & boxes of water necks and only a couple have the bump.

Alot of Ford heads produced after the Model A was built should have a Ford script and some will have a part number cast into the head right on the water pump boss.

The combustion chamber is a dead giveaway regardless.

Kurt in NJ · 03-10-2011, 01:38 AM

8.5 Weiand
Stock nos diamond

James Rogers · 03-10-2011, 05:40 AM

Quote:

Originally Posted by TinCup

James do you know your booth number yet?

Not yet. I'll have to get that from Brent and post it this weekend.

03-09-2011, 03:51 PM	#1
jbrenek Junior Member Join Date: Jun 2010 Posts: 16	High Compression head ? Is there anyway with the head off the engine to tell if it is a high compression head. It does not have any marks on it or who is the manufacturer. Is there any dimensions for the depth of the flat area on the inside of the compression chamber that can be measured ? The head has not been planed. Thanks, Jim

03-09-2011, 03:58 PM	#2
dfish2931nc Member Join Date: May 2010 Location: NC Posts: 68	Re: High Compression head ? Most high compression heads have a heart shaped combustion chamber. A stock head has a combustion chamber that is more square shaped.

03-09-2011, 04:03 PM	#3
Charlie Stephens Senior Member Join Date: May 2010 Location: Southern California Posts: 7,032	Re: High Compression head ? Jim, Post a picture of the combustion chamber. Charlie Stephens

03-09-2011, 04:49 PM	#4
TinCup Senior Member Join Date: May 2010 Location: OKC / Tonkawa, Ok. Posts: 1,977	Re: High Compression head ? Check out this post and you will see a picture of a high compression head combustion chamber. Click Here

03-09-2011, 05:50 PM	#5
James Rogers Senior Member Join Date: May 2010 Location: Asheville,NC Posts: 3,104	Re: High Compression head ? I have found that most of the original heads have a small bump or square in the casting just in the middle of the boss where the water pump mounts. Most all of the original cast iron parts have this bump. I have found them on the block, water inlet and outlets, water pump housings, crank pulleys and other original parts. If it has the bump, it is stock.

03-09-2011, 06:10 PM	#6
TinCup Senior Member Join Date: May 2010 Location: OKC / Tonkawa, Ok. Posts: 1,977	Re: High Compression head ? Sponsored Links (Register now to hide all advertisements) James do you know your booth number yet?

03-09-2011, 06:13 PM	#7
LukeDahlinger BANNED Join Date: Dec 2010 Posts: 956	Re: High Compression head ? The bump mentioned above may not be the most reliable method to tell. I have a stack of original heads & boxes of water necks and only a couple have the bump. Alot of Ford heads produced after the Model A was built should have a Ford script and some will have a part number cast into the head right on the water pump boss. The combustion chamber is a dead giveaway regardless. __________________ Wanted- Feb. 1931 Parts Price List www.vintagefordfacts.blogspot.com