This is topic Fuel pressure? in forum Tech Talk at Northern California Ford Owners  .


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Posted by ihatethesesns (Member # 684) on :
 
I have a 97 gt with a vortech s-trim. I'm getting ready to install aftercooler, 3.33 pulley, 30lb injectors, walbro 255, 80mm PRO-M, and areomotive fuel pressure regulator. So what should I set the F/P to?
 
Posted by 91 5.0 (Member # 1527) on :
 
No FMU????? With no FMU and no custom tune/chip, your gonna either run rich on the bottom or lean on top.
 
Posted by LAST302 (Member # 808) on :
 
You are messing with danger if you have no fmu or chip. If that is the case I would get ahold of Byron(Racesystems) or Joe at Mustang Ranch and get some advice. I put a blower on a couple of years ago with similar fuel parts with no tune or fmu and blew a head gasket and did other damage on the way to the gas station five minutes after bolting the blower on. Dont think you can get away with it for a short time even if you say to yourself that you will drive cool because I never took my car over 3000rpms and I caused serious damage. Just some advice!!
 
Posted by ihatethesesns (Member # 684) on :
 
Well I'm not puting everything on until this weekend and will be at apex next saturday for my tune.
 
Posted by Jeff S (Member # 371) on :
 
With a properly calibrated MAF and the appropriate size injectors you should not need a chip or an FMU. The only way to know for sure is by using a wideband o2.
 
Posted by Jeff S (Member # 371) on :
 
I'd set the FP to 40psi with the vacumn line disconnected for starters.
 
Posted by ihatethesesns (Member # 684) on :
 
quote:
Originally posted by Jeff S:
With a properly calibrated MAF and the appropriate size injectors you should not need a chip or an FMU. The only way to know for sure is by using a wideband o2.
If by chance pro-m does calibrate the MAF correctly is what I stated in my first post a good balance for my fuel system?
 
Posted by Jeff S (Member # 371) on :
 
quote:
Originally posted by ihatethesesns:
quote:
Originally posted by Jeff S:
With a properly calibrated MAF and the appropriate size injectors you should not need a chip or an FMU. The only way to know for sure is by using a wideband o2.
If by chance pro-m does calibrate the MAF correctly is what I stated in my first post a good balance for my fuel system?
Looks like it should work just fine. You should be able to get your A/F ratio where you want it just by playing with FP
 
Posted by st5150 (Member # 51) on :
 
Yeah, with the combo you listed, it should make low 300ish rwhp. 30 lbs injectors at 45ish PSI should be plenty.
 
Posted by ihatethesesns (Member # 684) on :
 
Thanks for your the input guys.
Hey Jeff what's the name of Joe John's shop in san jose just out of curiosity? This guy at work told me his cousin had a bad mustang yadda yadda and if I ever needed parts or advice to talk with him. Didn't really pay much attention seeing everybody knows some one with a "bad ass mustang", then the other day he said check out unlimited that his car maybe on there.
 




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