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Fuel Pressure question/advice

10K views 2 replies 2 participants last post by  danoz  
#1 ·
A little background,
I have a 2003 Z06 with heads/cam/headers and P1 Procharger making 5# of boost. On the dyno it put down 567HP/482TQ. My A/F is 11:1 all the way to redline. This is on a stock short block and stock fuel pump with 38# injectors.

I am seeing 60-62#'s of fuel pressure at idle and while cruising. At WOT it is dropping down to about 46-48#'s. From some the of the other threads I have read this seems dangerously low for a car with a S/C. Sound about right? Am I on borrowed time with my motor? If so any suggestions as to what type of fuel pump I should get? Should I move up in injector size as well? Meth injection? Or has any been running a setup like mine for quite some time and have had no problem so far?

Any advice would be helpful. Thanks - Dan
 
Discussion starter · #3 · (Edited)
Looks like we have the same gauges therefore the same false/inaccurate readings. It just didn't seem possible for 38# injectors with 46lbs of pressure to supply enough fuel for an 11:1 A/F ratio for that much HP.
Thank you for a very informative post. It looks like I will be getting that Racetronix fuel pump and some bigger injectors just to be on the safe side.
- Dan