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Originally Posted by My5ABaby
75psi is pretty low. I'd expect hot start issues at that point.
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I should clarify, this is with a long-hose piston engine compression gauge with the check valve out. it runs about 135-140psi with the check valve in - this is the highest compression that I have seen from an 8.2:1 rotary.
With an in-port compression gauge I get 125 psi bounces (9.2 bar).
If you turn the front pulley partway through a compression stroke and release it, the engine will rotate backwards.
The long hose compression gauge adds enough volume that the compression reading does not match the engine compression, it is still a decent estimate though.
45 - 50 psi bounces with a long hose gauge is adequate to start the engine.
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1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers)
1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)
Last edited by NoDOHC; 09-23-2010 at 10:27 PM.
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