Stand alone pump
11-22-2008, 04:17 PM
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Stand alone pump How much psi does a stand alone fuel system need for a 150-250 shot. (150 on current motor and 250 after build but only want to buy 1 pump)?
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11-24-2008, 10:11 AM
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11-24-2008, 12:41 PM
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150*.26=39
So i need a pump that flows at least 39 gph?
That sounds way to low.
The way I figured it out is that if for 600 rwhp you need 255 gph and 250 hp is 42% of 600...then you will need 42% of 255 which is 107 gph.
11-24-2008, 01:39 PM
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Take into consideration that you didn't convert 255lph to gph. So using your math you would take 42% of a pump that flows 66.3gph (255lph pump). That comes out to roughly 28gph. I would take a harder look at the bsfc calculation rather than using a percentage rational. And keep in mind that the walbro pumps aren't all the same and most of them are a little deceiving in the actual amount that they flow.
Nick
