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I think a stock ECU rotary should run about -15 to -18 "Hg at Idle. As you gently rev the engine in neutral, this will dip a little about 1200 rpm (-18 to -21), but remain relatively consistant after that.
With an aftermarket ECU I run about -15 " Hg when cruising on the highway and about 21 " Hg at idle (Timing advanced over stock).
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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)
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