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Posted by Vaughn on Saturday, July 18, 2009 at 08:35:05 :
In Reply to: 230 Cylinder Pressures posted by Will (in IL) on Wednesday, July 15, 2009 at 19:54:32 :
T245 (M37) Compression psi for the 230 CID is:
Compression pressure at cranking speed is 120 - 130 psi. Open throttle wide open when performing this test.
Compression pressure at 1,000 rpm is 150 - 160 psi
Compression will vary if you have a head other than DT as indicated.
100 psi is fine. If you have any cylinders below 90 psi, then I might get concerned and may want to pull the head for inspections.