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#1
02-19-2011, 08:25 PM
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| need spec information 1971 olds 455 doing a compression test on my 71 olds 455 , been trying to get a handle on what the minimum psi should be per cylinder?????????? if anybody happens to have that on hand please give me a shout. thank bear  |
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#2
02-20-2011, 05:44 AM
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| It depends on the compression ratio the engine was built to. Assuming it is no more than 9.5:1, the minimum is about 125psi. It may start under that but will show a pretty worn engine. Also, do a dry and wet compression test. That will show if there is wear in the rings and pistons.
__________________ Gonzo |
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#3
02-20-2011, 09:41 AM
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| gonzo I'm sure it is 9;5;1 according to the information i have already received. thank you for your reply bear |
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