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The stock fuel pump puts out 35 GPH at the stock fuel pressure (36.3 psi). That figure was verified by SR Motorsports testing the pump installed in the car with the engine turned off. However, the pump must supply that pressure plus match the boost pressure when fuel pump output is most critical. With boost pressure at 10 psi, the pump will need to supply fuel at 46.3 psi. I don't have any data at that pressure, so I am going to guess it will flow 4 GPH less at the higher pressure. This guess is based on some maps of another, probably similar fuel pump from a DSM car. The stock pump probably puts out about 31 GPH under boost conditions.

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