Hey yall im new here & i was just wondering, Whats the normal compression for the 4g64 in a 91 mighty max? i cant seem to find what the normal compression PSI is for it online anywhere and i was wondering if anyone else knew.
Hey yall im new here & i was just wondering, Whats the normal compression for the 4g64 in a 91 mighty max? i cant seem to find what the normal compression PSI is for it online anywhere and i was wondering if anyone else knew.
A deviation of 5psi between neighboring cylinders and 15psi max to min.
anything over 100 is good. 135+ is very good. 150+ is getting into like new
Lower than that doesnt mean its junk, if they are all pretty even then the engine should run ok, but consider a rebuild down the track
This is done on a hot engine with dry bores
Last edited by SubGothius; 09-14-2020 at 01:20 PM. Reason: Formatting
Fixed that for'em. Font color legibility depends on which "skin" you select to view the site -- the default Velocity skin has a dark background in posts where the Light Green and Blue skins both have a light background, so a custom font color that looks fine in the default skin may well be illegible in the others.
1987 Dodge Ram 50 4G54 RWD longbed ("Elmo")
1979 Lancia Beta Zagato spider ("Lola")
1982 Lancia Beta Zagato spider ("Luigi")
Yea, that was painful.
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