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The supercharger is sucking so much air that the power valve stays closed. It's been an issue for others before, may be for you too. That's my guess.
R.




Power-valve is boost referenced,also tried with and without power-valve+8jets.
I`ve run from 84`s to 99`s still AFR of 13.0

70` Cuda`,440 6BBL Jerico,Dana 4.56 Still on 93 Pump Gas
9.87 @ 136/1.31-60ft.`09 Mopar Nationals PASSON PERFORMANCE "Stick-Shift" Champ!
2013 StickShift Challenge Winner@ Mopar Nationals!