vacuum adjustable fuel pressure reg
09-06-2007, 12:08 AM
#1
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Location: Webster Texas
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Car: C4
Engine: 383 Crossfire
Transmission: 700r4
Axle/Gears: D36 3.75
vacuum adjustable fuel pressure reg
Is it absolutely necessary to have a vafpr to make an engine idle at 23 or so psi, or can I simply run 2-65lb injectors at 23 all the time. I'm getting my fueling system sorted before I start tuning w/the Flash EBL .
09-06-2007, 07:56 AM
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Car: 1988 Camaro Coupe
Engine: 305 5.0 L03 TBI
Transmission: T5 - 5 speed
Axle/Gears: open diff. & stock 3.08 gears
Re: vacuum adjustable fuel pressure reg
if you read about TBI mods it tells you how to make your stock fuel pressure regulator into one you can adjust yourself, i did it and works great. all you need is a di grinder.
09-06-2007, 09:44 AM
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Re: vacuum adjustable fuel pressure reg
I run 33 PSI through 55pph injectors right now at idle and have no issue. I am sure the idle could be cleaned up a little if I were to run on though.
09-06-2007, 03:04 PM
#5
Re: vacuum adjustable fuel pressure reg
you are doing what I did. run higher FP in lieu of utiliizing a VAFPR which i have on my Aeromotive reg but never used. watch your DC at idle to see if it bottoms out. mine did. also at idle i would flip from synch to asynch to reduce fueling which caused a surge and enleanment as fuel was being cutoff(asynch). so i ended up running synch only at idle. but with a 383 you may not have these issues??
09-06-2007, 04:46 PM
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Car: '92 Toyota Pickup
Engine: 22R-E
Transmission: 5sp Manual
Axle/Gears: 4:??
Re: vacuum adjustable fuel pressure reg
get the holley apr it's by far the best. You don't need a vacuum one. Not yet that is!
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