What are the stock fuel injectors rated at in a 1991 350 Camaro? Is it 22 or 19? Also, I have an adjustable fuel pressure regulator...whats the best pressure to set my fuel at and will it affect anything by making it higher?



1991 350 TPI(factory engine) with t-tops THAT DON'T LEAK...SLP stainless steel headers (soon to run into true duals), BBK 52 mm throttle body, bored plenum, slp runners, tb bypass, adjustable fuel pressure regulator, b&m supercooler, hurst dual gate shifter

 

Well , you would have the 22 lbs ones . and I would think that you should start lower on the pressure ( 44 psi ) and work your way up untill you see a drop in performance ....... I would use track times to guage this progress ....not the best way ....but who has a chasis dyno . I would think the higher you go ...the more you shorten the life of the injectors ( I am guessing here ) .


good luck to ya

 

Stock ones are 22 pph.

I would stay off the AFPR. I have one and set it to about 2 # more than stock pressure. However, I have a custom EPROM that will adjust for the motor's needs. You can adjust fuel volume by changing the pulse width or increasing fuel pressure. Since fuel requirements are not always lenear, I would change it via the EPROM. Using the AFPR is cheaper but you end up getting more fuel everywhere. You might have to tune the pressure up so you don't run lean at WOT but you may be running rich at some point or points. Why bother? Get the chip tuned to the car and you will not have to worrry about it.