Quote:
Originally Posted by JSH
We're in the tuning process, the car runs well, and the most surprising data we've seen so far is a drop in absolute manifold pressure from 31# in the previous build to 25# in this build.
The previous build was OEM shortblock with LME heads designed for the Hennessey 850. The new build has LME's short block and race heads.
Kong has always said that 31# was too high and that I needed a more efficient motor.
Has anyone else here seen such a drop?
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Yeah huge drop when I went with the Mast heads and new cam vs the stock longblock. Had to make a major pulley change and spin the blower a lot harder since the motor could move a lot more air. Sounds like you’re on the right track! 
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, ATI 8L90, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors & BB HPFP, TooHighPSI/Katech port injection, 15” conversion 1066 WHP STD/1027 SAE, 9.10@152.5 (new times coming)
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