Technical > Spud Miller's Cave

optimum fuel pressure

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fuel749:
Is there an optimum fuel pressure to shoot for with my Hilborn pump? Is cavitation or something similar an issue at higher fuel pressures? Any benefit from a gear pump with more pressure? All of this is on Alky by the way.

Spud Miller:

 If you could be making 80-120 PSI at the nozzle at the finish line, that would be great. That's about all you'd want to see with a standard (Hilborn/Enderle) type pump. There really isn't a benefit to going a bunch higher than that. The gear pumps don't mind the pressure, but it's not worth the extra cost for one just to run a bit more in my opinion.

 Somewhere around 200-230 PSI, standard type nozzles quite flowing in a linear way anyway.

 A pump won't cavitate due to high pressure on the outlet side. Mostly cavitation happens due to drawing too much volume through a small or restricted supply side.

 Spud

fuel749:
Thanks Spud.

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