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03-26-2010, 12:07 PM
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#1 |
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Registered User
Join Date: Oct 2008
Location: Sparta, MI
Posts: 446
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SBC 327 Compression
What (In PSI) Should the compression be of a 60's corvette 327 engine be. I am getting anywhere from 120-135 psi.
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1972 longbed- 454 1967 shortbed- 355 |
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03-26-2010, 03:14 PM
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#2 |
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Registered User
 
Join Date: Apr 2005
Location: Medford, MA
Posts: 307
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Re: SBC 327 Compression
I think it's more about the consistently of the compression levels between the cylinders. If you're getting a +/- 7 psi spread @ ~125 psi, I think you're ok.
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03-27-2010, 02:34 PM
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#3 |
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Registered User
Join Date: Dec 2007
Location: Southington CT
Posts: 548
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Re: SBC 327 Compression
this is what I had when I first checked mine the first month i bought it, (68 327)
1 - 160 2 - 165 3 - 165 4 - 170 5 - 170 6 - 165 7 - 170 8 - 160 as stated above, its more important to note separation between cylinders than anything, many things can vary how "MUCH" compression you have. GL, |
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03-27-2010, 03:08 PM
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#4 |
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Senior Member
Join Date: Apr 2000
Location: Delta,Pa
Posts: 14,950
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Re: SBC 327 Compression
Compression ratio and camshaft can greatly affect compression test numbers. Generally 125 is showing a worn engine but its evenly worn and I wouldnt worry about getting a good bit more mileage out of it. If your looking to do upgrades such as new heads or a cam swap for more performance etc. I would wait until you can do a full rebuild. A lot of those 60' engines were above 10-1 compression which should definately show more than what your getting. Im not saying the engine is worn out but I wouldnt be doing performance upgrades or be out beating on it.
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