The Ford Barn

B0B · 09-13-2016, 10:32 PM

My friend has a 31 coupe new to him I was helping work on it he thinks it may have a high compression head the only marking on it is the number 10 on top near to the water inlet the numbers are rather big about 3/4 inch high . Does anyone know if this is a high compression head or a stock original ? I never saw one with the number 10 on it ?
Thanks guys b0b

James Rogers · 09-14-2016, 06:34 AM

Probably not. A compression check will show if it is anything over stock which is normally 60-65# PSI.

Bob Bidonde · 09-14-2016, 08:20 AM

A compression test will answer the question.

V4F · 09-14-2016, 11:03 AM

I have a 7-1 , compression is about 125#

johnbuckley · 09-14-2016, 12:17 PM

Quote:

Originally Posted by Bob Bidonde

A compression test will answer the question.

What are the comp readings for standard and the various HC heads Bob?

Y-Blockhead · 09-14-2016, 12:28 PM

Sponsored Links (Register now to hide all advertisements)

I believe mine is a stock head, last compression test was 75# in all.

Tom Endy · 09-14-2016, 12:53 PM

The Snyder high compression heads usually have two round casting marks on the top surface of the head. Each is about the diameter of a dime and they are a few inches apart. They can be located at different places depending on the lot.

Tom Endy

B0B · 09-15-2016, 12:11 AM

Thanks Guys for your comments . My friend does not have a compression tester he lives about 40 miles from me . I just thought that someone would know what the number 10 means that is on the head . B0B

09-13-2016, 10:32 PM	#1
B0B Member Join Date: Jun 2010 Posts: 82	High compression head ? My friend has a 31 coupe new to him I was helping work on it he thinks it may have a high compression head the only marking on it is the number 10 on top near to the water inlet the numbers are rather big about 3/4 inch high . Does anyone know if this is a high compression head or a stock original ? I never saw one with the number 10 on it ? Thanks guys b0b

09-14-2016, 06:34 AM	#2
James Rogers Senior Member Join Date: May 2010 Location: Asheville,NC Posts: 3,104	Re: High compression head ? Probably not. A compression check will show if it is anything over stock which is normally 60-65# PSI. __________________ http://www.model-a-ford-4bangers.com/

09-14-2016, 08:20 AM	#3
Bob Bidonde Senior Member Join Date: May 2010 Location: Long Island, NY Posts: 3,463	Re: High compression head ? A compression test will answer the question. __________________ Bob Bidonde

09-14-2016, 11:03 AM	#4
V4F Senior Member Join Date: May 2010 Location: ca. Posts: 2,522	Re: High compression head ? I have a 7-1 , compression is about 125# __________________ V4f

09-14-2016, 12:28 PM	#6
Y-Blockhead Senior Member Join Date: Jul 2011 Location: Redondo Beach, CA Posts: 5,849	Re: High compression head ? Sponsored Links (Register now to hide all advertisements) I believe mine is a stock head, last compression test was 75# in all.

09-14-2016, 12:53 PM	#7
Tom Endy Senior Member Join Date: May 2010 Location: Southern California Posts: 3,131	Re: High compression head ? The Snyder high compression heads usually have two round casting marks on the top surface of the head. Each is about the diameter of a dime and they are a few inches apart. They can be located at different places depending on the lot. Tom Endy

09-15-2016, 12:11 AM	#8
B0B Member Join Date: Jun 2010 Posts: 82	Re: High compression head ? Thanks Guys for your comments . My friend does not have a compression tester he lives about 40 miles from me . I just thought that someone would know what the number 10 means that is on the head . B0B