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Yes. If either intake or exhaust valve is open for any amount of the compression stroke the captured air would be that much less. The compression numbers he gave me were so low that it seems questionable that it would run at all. 120 psi?
He cranked five strokes per with wot and dry cylinders (afik).
He is not willing to run a leak down test for me.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.  [SIGPIC]
..I also have a 427 Cobra replica with an aluminum chassis.
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