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Good call Ted, I forgot that I am running negative split at idle. I was able to run more vacuum without misfiring by running 5 degrees negative split at idle. I also run negative split over 6,500 rpm. You need to have relatively advanced ignition timing before you try it (at least 5 deg BTDC, negative split causes a lot of surge with -5 BTDC timing (the factory setting of 12-15 degrees of positive split is much better when retarded that far).
I have not tried negative split while cruising. I will give that a shot once spring comes.
I am not sure that your e6k will support negative split. I think not, actually.
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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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