what fuel pump will be sufficient?

[69projectKAOS]

i have a chevy 383 stroker motor 425hp and i am mostly going to do cruising and the occasional race here and there. what is a sufficient gallon per hour fuel pump? 80gph , 110gph???? thanks dom

[RSX302]

fuel injection?

Example (If I'm correct with my numbers ---LOL)
A 255lph pump is 67gph (1gal = 3.78liters)

67gph * 6lbs per gal/fuel = 402lb/hr

402lb/hr / .5bsfc = 800hp
402lb/hr / .6bsfc = 670hp

.5 bsfc = n/a engine
.6 bsfc = boosted

I see these pumps rated from 500-700hp depending on where you look. Either way---it's more then enough to support 425hp.

[RSX302]

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[b-man]

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[RSX302]

I found this which helps calculate the pump better. Not a true 255 at 45psi. It will if you use it for a carb motor at 15psi.

57gph at 45psi will supply 215lbs/hr and 430hp at .5 bsfc. A normally aspirated engine will typically be closer to .45bsfc. (477hp)

I think the 500hp max number would be more accurate for a Walboro 255 pump. The HP unit is the better of the two. This is with 12v so it should pump a little more at 13-14v.

[69projectKAOS]

thanks you guys are always a big help -thanks dom