The Ford Barn

cars2cool · 06-24-2024, 10:09 PM

I just did a compression test on my fresh "A engine today. The block is bored .060 oversize and has a consistent gauged compression in all 4 cylinders of 65 psi. The elevation in my driveway is 1200 feet above sea level and I don't know what my atmospheric pressure currently is. The heart head I have on my A is an unmarked type. I tried to cc measure the head before installation but failed at it. Would like to know a ball park figure of what the compression ratio is using gear head math. And as my 7th grade math teacher, Mr. Etzel said "Mr. Knudson you need to show your work so I can see where you made your mistake." The new NAPA compression gauge is made in CHY-NA, so I have my doubts right there. Thanks in advance

06-24-2024, 10:09 PM	#1
cars2cool Senior Member Join Date: Jun 2010 Location: Sioux City Iowa Posts: 221	Heart head compression question-gear head math I just did a compression test on my fresh "A engine today. The block is bored .060 oversize and has a consistent gauged compression in all 4 cylinders of 65 psi. The elevation in my driveway is 1200 feet above sea level and I don't know what my atmospheric pressure currently is. The heart head I have on my A is an unmarked type. I tried to cc measure the head before installation but failed at it. Would like to know a ball park figure of what the compression ratio is using gear head math. And as my 7th grade math teacher, Mr. Etzel said "Mr. Knudson you need to show your work so I can see where you made your mistake." The new NAPA compression gauge is made in CHY-NA, so I have my doubts right there. Thanks in advance