In addition, you may want to run the second pump with a Hobb switch instead of off the accelerator - alot easier to tune when the second pump comes in only under boost. I have tuned several LSx cars with dual pumps and this type of actuation and it works great...
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Bret Shook
GM EFI Tuner
1980 Camaro Z28 project (For Sale)
2002 Trans Am WS6 mid 9's on pump gas and drag radials - sold
1972 Camaro ground up resto-mod - sold
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