TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

Adjustable Fuel Pressure Regulator

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Old Mar 19, 2002 | 11:04 AM
  #1  
91Bird305's Avatar
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From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
Adjustable Fuel Pressure Regulator

Hey, I got that AFPR from turbocity and that screw that comes out from the hole that u twist to increase or decrease, do u leave that in there when install it or how does that go in there?? Is it suppose to protrude thru the bottom of it when I install it and what is that cone thing for and where does that go? Thanks

Last edited by 91Bird305; Mar 19, 2002 at 11:06 AM.
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Old Mar 19, 2002 | 01:13 PM
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Car: 91 Red Sled
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<-- shakes head while wondering why you didn't just make your own adjustable.
Anywho; Yes it's suposed to stick out. This lets you adjust the pressure without taking the injector pod off. That cone is where the spring sits. To increase the fuel pressure you need to screw down on the spring. The pressure regulator is on the return fuel line side after the injectors. If you back out the screw you decrease fuel pressure.
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Old Mar 19, 2002 | 01:37 PM
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91Bird305's Avatar
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From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
<-- shakes head while wondering why you didn't just make your own adjustable.
I knew u would say that u son of a b*tch. :sillylol:
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Old Mar 19, 2002 | 01:40 PM
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91Bird305's Avatar
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From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
Oh and thank u.
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Old Mar 19, 2002 | 09:53 PM
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how much was that. that is a helluva lot easier then taking the pod off everytime you want to make an adjustment
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Old Mar 19, 2002 | 10:43 PM
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From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
I got mine slightly used for 45.00 but check to see how much they are at turbocity
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Old Mar 20, 2002 | 12:59 AM
  #7  
Joel Geerling's Avatar
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Car: 91 Formula
Engine: 305 TBI
Transmission: 700R4
Is that the only reason you bought it? So u could adjust w/o removing the cylindar?
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Old Mar 20, 2002 | 01:05 AM
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righty tighty, lefty loosey
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Old Mar 20, 2002 | 07:38 AM
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91Bird305's Avatar
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From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
Is that the only reason you bought it? So u could adjust w/o removing the cylindar?
No, because it was 45.00 shipped and it was from a friend, what does it matter? LoL.
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Old Mar 20, 2002 | 04:14 PM
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OK guys.....do you want me to show you how to make the stock pressure reg adjustable without removing it from the unit?


Last edited by DM91RS; Mar 20, 2002 at 06:49 PM.
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Old Mar 20, 2002 | 07:22 PM
  #11  
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Car: 91 Red Sled
Axle/Gears: 10bolt Richmond 3.73 Torsen
Originally posted by DM91RS
OK guys.....do you want me to show you how to make the stock pressure reg adjustable without removing it from the unit?

Yes
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Old Mar 20, 2002 | 07:40 PM
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From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
No
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Old Mar 21, 2002 | 04:13 PM
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From: Ga
Car: 91 RS
Engine: 305
Transmission: T5
Axle/Gears: 3.73
Originally posted by 91Bird305
No
ll

Last edited by DM91RS; May 28, 2006 at 05:26 PM.
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Old Mar 21, 2002 | 04:20 PM
  #14  
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From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
Originally posted by DM91RS


That's the help others spirit that we need on this board
U need some more? :sillylol:
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Old Mar 21, 2002 | 05:02 PM
  #15  
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From: Ga
Car: 91 RS
Engine: 305
Transmission: T5
Axle/Gears: 3.73
[Later

Last edited by DM91RS; May 28, 2006 at 05:25 PM.
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Old Mar 21, 2002 | 05:35 PM
  #16  
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From: ny
quick questoin the fuel regulator says it can adjust from 9-13 psi so what is it stock set on 9psi?
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Old Mar 21, 2002 | 05:53 PM
  #17  
91Bird305's Avatar
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From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
Oh yeah....I forgot the new guy has to change the targets. LOL
I have no problem changing targets. I change from target to target everytime I off someone cause thats all they are to me is targets....
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