I have heard that a boost refrenced mechanical fuel pump is only suffient to about 550 HP. But what about boost refrencing the carter 172, with a boost refrenced regulator. This would be cheaper than a comparable electric and no wiring in relays and such. Does any one see a problem with this in a blowthrough supercharged 496?

bump

How do you "boost reference" a mechanical fuel pump?

To externally reference a mechanical pump you need to plug the vent in the chamber above the diaphraghm, add a fitting to the same chamber and plumb it to your reference point.

but does any one know if this will be enough of a fuel pump for my application.
496 BBC
brodix Race Rite Oval ports
victor jr intake
750 holley mech sec.
jet technologies centrifugal supercharger 10 LBS
(roughly equal to YS trim vortech)
undecided on cam but in the area of a mild 235 deg @.050 lift and about .530 lift on 112 LDA
Dont hestitate to ask questions about stuff I forgot.
thank you

90% street
10% strip
72 chevelle
3800 LBS ?
3.42:1 ratio axle
Super T-10

My guess is that its not enough to supply the motor @ fully boggie. I dont think it has enough poop. 2 issues, the first is that they can only pull soo much fuel & they are suckers not pushers so, I would guess that it would be on the edge, if not insufficient. IMO, its worth the extra time & bucks to go completly electric. My motto is: "you cant have too much fuel pump or too much tire".

Bob