Holley fuel pump

[Johnny]

Tom Cloud wrote:
> 
> >> I fitted a holley fuel pump on my celica not too long ago. Count your
> >> blessings you have a stereo: i haven't put mine back in yet! Mine changes
> >> pitch with the indicator!!
> >>
> >> Is this pump running at high pressure?
> >
> >Bruno,
> >Not real high.  It is the pump holley normally sells with their pro-jection
> >FI conversion kits.  I think Holley told me it does upto 30psi.
> 
> I guess I'm confused -- the big red and blue Holley gerotor
> pumps are LOUD! and have about 7 - 10 psi output pressure -- they're
> designed to replace the old mechanical pump and to drive a carb.
> I have one of those in series before the high-pressure Carter
> pump on my ProJection.  The smaller Carter in-line pump that
> comes with the ProJection is designed to feed into a 15 - 20 psi
> regulator and makes no noticeable noise above the normal cabin
> noise of my Bronco (I've had two of the Carter pumps -- thought
> the first was bad when it was a clogged pickup sock in the tank).

The difference between the Red Holley and the Blue Holley is the line
pressure. It's typically about 15 psi on the Red one. Blue one is 7. At
least that's what my fuel pressure guage shows.

-j-