Compression Test Results? What do these mean?

[strohlde]

I'm not sure exactly what these mean? Most of what I've seen says 10% is ok...some people even go as far as 25% being ok. These are within in 10%

Marine Power 5.7L

1.170
2.175
3.160
4.170
5.175
6.175
7.170
8.160

[chpthril]

Rule of thumb is the lowest should be with in 10% of the highest.

Those #'s look fine.

[brett22i]

Agree with Chp on this one, if you are looking for really good compression ratio 10% is really strict. I have heard as high 15% is acceptable, but anything more than that you are looking at a problem. Those are great numbers on your cylinders.