[Shotimes] Help with Fuel system problem.

Kevin & Cheryl Airth clubairth@peoplepc.com
Thu, 22 Apr 2004 22:26:19 -0500


I think the bigger pumps are unnecessary but some increase over stock seems
to be cheap insurance. If you run the numbers like Ted B. does in his
excellent book "SHO Performance Level 1". The stock MTX pump puts out 90
LPH. If it's 100% this will support 330 HP. So it's plenty stout but things
don't work 100% and aging takes it's toll. So the 190 LPH even working at
50% is still 95 LPH. It's like the stereo thing where you don't need 500
watts all the time but on music transients you do!
 Yes with a SC or running NOS you really need to look at the whole fuel
system, maybe even go beyond to some of the booster systems he sells for the
Scy/Ty guys or the heavily supercharged. One has a max. output of 130 psi!
.
.



> That sounds right in your case as stock.    I usurped your thread to
> ask a question of my own.  Hope you don't mind.
>
> I know some people go to the 255 lph pump.  So what is the trigger
> that drives one from a 190 lph pump to a higher capacity pump.
> Stage 1 cams, BBBs, soopa charger?
> -- 
> Cheers,
> Carl Prochilo
> 1992 Ultra Red Crimson
>
> Donald Mallinson said:
> > I am not sure what size to get, but the car is stock, so the
> > 190 LPH unit that Kevin mentions is probably going to be plenty.
> >
> > Don Mallinson
> >
> > Carl Prochilo wrote:
> >
> >> Wow!  I've had that same exact problem (different car) and
> >> actually
> >> also arrived at the incorrect conclusion that the fuel pressure
> >> regulator was at fault.
> >>
> >> About fuel pumps, what mods drive you to need a 255 lph pump?  I
> >> am
> >> starting to face the reality that sooner more likely than later my
> >> 12 yr old fuel pump will need to be replaced.
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