? UR FAVORITE?? Adj. Fuel Press. REg.?

I got an areomotive one but havent installed it yet...I also have a Dynotune Fuel Pressure Gauge. It is a digital gauge that is electrical so you dont have to run fuel into your cockpit or compartment. They are pretty expensive but since I will be running nitrous I thought it would be a good idea to see if the fuel pressure actally spikes when it is suppose to.

I have an Aeromotive as well. Ive had it on the car for almost 2 years now with no problems at all. Having the guage in the car is nice if you want to watch the fuel pressure as the RPMs rise or fall, otherwise it doesnt really matter if its on the rail or not. If you put it in the car make sure its electric so you dont have fuel going into your car.

You can't go wrong with Kirban, I've had mine for 2 years with no issues whatsoever. It is very easy to set the fuel pressure and it stays right where you set it to. My vote is for Kirban

First off, what the hell is a kenny brown GT?

Second off, why do you think you need a fuel pressure regulator?

Kirban ALL the way plus it looks cool as hell had mine for 2 years with zero problems

How about none? Unless you have altered your PCM, your computer WILL adapt around the regulator to settle you at essentially the same fuel pressure as stock. I know there's a fancier explanation then that but I don't want to type it out.

This is why you here about peeps going to the dyno, tuning via that method and getting great results, then 2 months later it runs like ass. An AFPR will work on an A9L computer, but doesn't play well with ours.

Adam

I got BBK and it works just fine.

Another vote for Kirban here! I've had mine on my car for over 7 years without any issues.

I have had both Kirban and Aeromotive, and have had no problems with either.

xkuntrycowboyx said:

What's the favorite adustable fuel pressure regulator around??

and would a gauge for in the car be just as good as putting one right on the rail???

im getting one this week so i thought i'd ask for reccomendations before i buy.
money not a huge issue but wanna keep it under $150

Thanks guys.

@d@m

Click to expand...

Alright fellas, here's the deal:

Our cars don't have fuel pressure sensors. At no point does your mustang know what the fuel pressure is. Clear? Its a mechanical setting that the computer takes for granted as being 39.5 PSI.

What the car does know is injector pulsewidth. The car knows, from constants in the computer, what the pulsewidth should be for optimum performance according to stock components. When you mechanically adjust the fuel pressure, you have changed that constant. The computer, using adaptability algorithms, will change your injector pulsewidth to factor in the increase in fuel pressure, essentially canceling out your fuel pressure modification.

Now, on a FOX, when you go wide open throttle, the computer does not use any adaptability algorithms and the adjustable regulator can be used with great success. When you dyno tune a car, this is what is used to tune it. Nobody dyno tunes at partial throttle!

On an SN95, when you go wide open throttle, the computer STILL plays a roll in injector pulsewidth. So when you dyno tuned with the AFPR for max power, its all good, but over time, that tune is influenced by the computer.

The only reason to use an AFPR is that in some cases, installing a high pressure fuel pump, like the 255lph, will freak out the stock unit thats not built to handle it. So if you install a new pump, its worth it to make sure FP is maintained. If you find the stock unit cannot handle the 255lph, then you should buy an aftermarket adjustable unit and SET IT TO 39.5! I went through this when i put in my new pump and my stock regulator was going strong, so I didn't upgrade.

Sorry for the long post but I tried to be as clear as possible.

Adam

Thank you.

I just sent you a pm on my BBK I just took off.

so was anything special done to the engine performance wise?