weinerschizel

I'm putting a CC 306 cam in my car. I want to make sure I don't run lean so I'm going to put an adjustable fuel pressure regulartor in too.

Does anybody know of a good one to use? Are there any good deals out there right now?

Thanks for the help!

Antz97ZNJ

havent heard about these in awhile..i believe slp makes one

Mike383LT1

aeromotive 13107 100% bolt on

J's 82

I have a holley billet afpr.. nice piece bolts on.. don't have the part number but I got it from Jegs..

revtime

512-502 is the part number for the Holley AFPR 35 to 60 psi.
I just installed one and its a nice piece.

$hawn

I dont see how it's going to be effective on anything but a 93.

97Z-M6

will not help you none. spend your money elsewhere.

revtime

Correct me if I,m wrong but at part throttle it would not help you but it should help at WOT.

93Z286Speed

AFR's do make a difference

97Z-M6

the pcm does not see the pressure but it will see the added fuel and compinsate for it by lowering the pulsewidth on the injectors.

Mr Kevlar

I've heard this also. It will make a difference, but the PCM will compensate. So does that mean that there is no reason/benifet for an adjustable regulator for a MAF equipped f-body?

revtime

Yes, but the PCM is not reading the O2s at WOT right? So if you bump up the pressure then at WOT you would get some gains, would,nt you?

97Z-M6

no the pcm has a targeted A/F ratio its shooting for. and based on the the blms that it has leared before you go into PE mode (not open loop) is what it uses to hit the target A/F ratio. open loop uses 3 diferent cells, pe mode uses 2, if it saw anyhting greater than 128 it will uses cell 15 anyhting less than 128 it uses cell 18. so all in all its uses what its learned to hit the target A/F ratio in PE mode

so when you go into pe mode it sees the last cell it used (which it has already corected for the Afpr). and knows how much to adjust the pulse to hit its target.

this is a very rough paraphrased answer but trust me i does no good at any point in time.

97Z-M6

you would not want to up the pressure becuase the car already is running rich.

you need to do all the fuel changes in the pcm.

revtime

So if I have had the PCM programmed by someone like Ed Wright then I could benefit from upping the fuel pressure?