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Originally Posted by Superduty
That is a myth. It is false.
The only difference between a pump operating at 1 PSI of inlet pressure and 1 PSI of inlet vacuum is that the absolute pressure at the pump inlet is 15.7 PSIA versus 13.7 PSIA. It makes NO difference to the pump itself, provided the inlet pressures are sufficient to keep the pump full without cavitation. NONE. ZERO.
The only reason I comment on this is so that people understand the basics.
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Well I know one thing for sure, when I change my fuel filter if I leave the lid off the fuel will seap into the canister all by itself, seaps thru the pump and fills er up.
Positive pressure is a good thing and it works for me, I will stick with this setup till a proven method shows me different on the VP-44 fueling issues. SO far this setup has beat my OEM system 3 to 1.....thats right 3 Cartewr pumps went (.) (.)'s up and this setup has worked flawlesly since day one
John I am excited about the Walbro R&D and when you get it figgered out I plan to upgrade the lil womans 600 with a complete system.................get er done so I can rest in piece with fueling issues, the PDF with all the details will be my guide to success here thanks to the hard work of many...................waiting patiently
Cheers, Kevin
02-17-2006, 07:49 AM
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