O-540 Fuel pump

[zkelley2]

Finally got around to doing my fuel flow test today as per the AC. Flowed 31gph from the left tank, 25 gph from the right and 32gph from both. No fuel pump.

Since that doesn't quite meet the 35.75gph they want from a gravity system I'll be installing pumps.

Funny that with a pump it gets the gph at 125% without the pump.

[AveDalang]

Hi....I believe there's something else entirely to it than that. The 24 volt adaptation of the siphon has a diagram of GPH versus pressure in the spec sheet. At 26 GPH, the pressing factor is ~29 PSI. I think this implies at that stream rate the siphon can keep up that pressure. So accepting that I'm deciphering effectively and expecting the 12 volt and 24 volt siphons are a similar I think I need to understand what the fuel pressure is/should be at departure power in an IO-540.

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