NB fuel pump, required?
#2
Boost Pope
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The stock pump in a '92 flows enough for ~200 WHP through 440s, so I imagine the stock pump in a '99 will suffice for ~250WHP through 550s.
The problem with stock fuel pumps in FI applications, and this covers both NA and NB, is not typically flow but rather pressure. This is principally a concern for those people running AFPRs with small injectors, where the pump is called upon to produce pressures in excess of 100 PSI, as compared to the 40 or 50 you see in a non-AFPR application.
At most, you might find that the increase in consumption through the rail necessitates a dual-feed arrangement, but I'd suggest that you try it as-is first and see how it responds.
The problem with stock fuel pumps in FI applications, and this covers both NA and NB, is not typically flow but rather pressure. This is principally a concern for those people running AFPRs with small injectors, where the pump is called upon to produce pressures in excess of 100 PSI, as compared to the 40 or 50 you see in a non-AFPR application.
At most, you might find that the increase in consumption through the rail necessitates a dual-feed arrangement, but I'd suggest that you try it as-is first and see how it responds.
#7
Boost Pope
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Wait... Can you even use a Walbro in a returnless system?
#8
Boost Czar
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if i had an NB I'd get the 255. since it runs at 60psi static, no reason not to.
I've also heard that some NBs have trouble maintaining the pressure to redline, and the 255 acutally does so.
this is only if I had an NB and if I in fact needed a fuel pump.
I've also heard that some NBs have trouble maintaining the pressure to redline, and the 255 acutally does so.
this is only if I had an NB and if I in fact needed a fuel pump.
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