Compression test opinions
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New User
Joined: Sep 2003
Posts: 13
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Compression test opinions
Just performed a cylinder compression test on my 460...wanted to get some of your expert opinions on whether these readings are reasonable enough to leave the engine alone for the time being.
1 - 130
2 - 130
3 - 145
4 - 149
5 - 145
6 - 132
7 - 130
8 - 135
Also, there is another set of lower numbers on the dial of the compression gauge...what do these indicate?
Thanks for the feedback.
1 - 130
2 - 130
3 - 145
4 - 149
5 - 145
6 - 132
7 - 130
8 - 135
Also, there is another set of lower numbers on the dial of the compression gauge...what do these indicate?
Thanks for the feedback.
Senior User
Joined: May 2002
Posts: 298
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From: Denver
The numbers look a little low but they average out ok. I wouldn't be thinking of pulling that engine unless you want to do other mods to it.
Robert
72 F100 Ranger XLT W/ 86 5.0L W/ AOD
www.geocities.com/krazdndenver
Robert
72 F100 Ranger XLT W/ 86 5.0L W/ AOD
www.geocities.com/krazdndenver
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New User
Joined: Sep 2003
Posts: 13
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I've thought about putting a set of Edelbrock Performer RPM heads on it. But I really don't want to go through taking the block to a machine shop for a re-bore, new pistons, etc. If I had to do that, I might as well just drop in a crate motor. More $$$, but less hassle.
How do you like the 5.0 in your truck? I would consider going to a small block.
How do you like the 5.0 in your truck? I would consider going to a small block.
Laughing Gas
Joined: Dec 2003
Posts: 900
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It's always been my understanding to not worry about looking for exact numbers, since there are so many variables like elevation, air temp, cam specs etc. Rather, just be sure the readings are all pretty close. I think you should be fine. If you had 1 or 2 readings around 100 and the rest were around 145 150, then I'd look for a problem.
