AFPR: Adj fuel pressure regulator
Thread Starter
|
Champion
Joined: Jun 2004
Posts: 2,811
Likes: 2
From: Ft Campbell, KY/TN
AFPR: Adj fuel pressure regulator
Has anyone used these with our trucks? i figure it would be a cheap way to get a little extra fuel in there without buying bigger injectors.
I think of this because my buddy ran 68 PSI in his 5.0 to get the AF more stoic.
I have bigger injectors, but i was wondering if this could be a lower cost mod for some people.
--Dan
I think of this because my buddy ran 68 PSI in his 5.0 to get the AF more stoic.
I have bigger injectors, but i was wondering if this could be a lower cost mod for some people.
--Dan
Well, Im not sure, But look at this:
http://www.procharger.com/video/TrucksBroadband.mov
Thats a procharger install on a 2nd gen. He installs a inline fuel pump if i remember correctly. does that help?
http://www.procharger.com/video/TrucksBroadband.mov
Thats a procharger install on a 2nd gen. He installs a inline fuel pump if i remember correctly. does that help?
Thread Starter
|
Champion
Joined: Jun 2004
Posts: 2,811
Likes: 2
From: Ft Campbell, KY/TN
They are necessary for boosted applications (increase fuel pressure as the boost increases since the boost creates a force AGAINST the fuel coming out of the injector).
But I was wondering if anyone here has installed one to just set their fuel pressure at 65 so the spray will have a higher pressure, thus making more fuel enter.
Just wondering if anyone used this instead of getting bigger injectors for a NA motor.
But I was wondering if anyone here has installed one to just set their fuel pressure at 65 so the spray will have a higher pressure, thus making more fuel enter.
Just wondering if anyone used this instead of getting bigger injectors for a NA motor.
Champion
Joined: Jul 2005
Posts: 2,966
Likes: 3
From: Greeneville, TN
There is no place to install them on our trucks. The fuel rails on a 5.0 are totally different. They have a regulator installed on the rail. To install the AFPR you remove the stock one and put the new one in its place.
It's the thing you you see in the top left of the pic. It's the round thing with the nipple. There is usually a vacuum line coming off of it
It's the thing you you see in the top left of the pic. It's the round thing with the nipple. There is usually a vacuum line coming off of it
Administrator
Joined: Apr 2010
Posts: 87,399
Likes: 4,214
From: Clayton MI
Running higher fuel pressure will only give you a richer mixture in open loop mode. (the PCM ignores the 02 sensor) Once into closed loop, the PCM will just shorten pulse width (the time the injector is actually passing fuel) to compensate for the higher pressure.
Running the higher pressure DOES give better fuel atomization though. So there IS some benefit to be had there. Is it worth the pain and strain, not to mention expense? Depends on how deep your pockets are I suppose.
Running the higher pressure DOES give better fuel atomization though. So there IS some benefit to be had there. Is it worth the pain and strain, not to mention expense? Depends on how deep your pockets are I suppose.