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Afpr

Old Nov 29, 2022 | 12:24 PM
  #1  
george88gta's Avatar
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From: Long Island N.Y
Car: 1988 Pontiac GTA
Engine: 5.7 l98
Transmission: 700r4
Axle/Gears: BW 9bolt with torsen carrier
Afpr

Can someone tell me the general location on their afpr set screw at correct pressure. (Southbay , screw on top)
I am currently unable to check fuel pressure. Want a good starting point. I assume right turns of screw increases pressure. Correct?
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Old Nov 29, 2022 | 12:28 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Afpr

A good starting point is get a gauge and check. What engine modifications have been done or what injectors being used that need higher pressure?
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Old Nov 29, 2022 | 12:42 PM
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Car: 1988 Pontiac GTA
Engine: 5.7 l98
Transmission: 700r4
Axle/Gears: BW 9bolt with torsen carrier
Re: Afpr

Originally Posted by Tuned Performance
A good starting point is get a gauge and check. What engine modifications have been done or what injectors being used that need higher pressure?
I agree, problem is I broke off scrader port so I have it sealed with screw at the moment. Ported tpi top end, 26pd injectors
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Old Nov 29, 2022 | 12:56 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Afpr

Originally Posted by george88gta
I agree, problem is I broke off scrader port so I have it sealed with screw at the moment. Ported tpi top end, 26pd injectors
if only modifications is ported 22#hr and tuning is the best solution. Running 26#hr with an injector constant of 22#hr you will be rich. Add more fuel pressure to that doesn’t help the situation.
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Old Nov 29, 2022 | 12:57 PM
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Car: 1989 IROC-Z
Engine: L98 350 TPI
Transmission: 700R4
Axle/Gears: BW 9 Bolt / 2.77 Posi
Re: Afpr

You could tee a fuel pressure gauge into the feed line on the driver's side of the engine, I suppose. But, there's no way of telling how much the screw needs to be in or out without a gauge.
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Old Nov 29, 2022 | 02:13 PM
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Car: 1988 Pontiac GTA
Engine: 5.7 l98
Transmission: 700r4
Axle/Gears: BW 9bolt with torsen carrier
Re: Afpr

Originally Posted by Tuned Performance
if only modifications is ported 22#hr and tuning is the best solution. Running 26#hr with an injector constant of 22#hr you will be rich. Add more fuel pressure to that doesn’t help the situation.
It is tuned for those injectors
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Old Nov 29, 2022 | 02:16 PM
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Engine: 5.7 l98
Transmission: 700r4
Axle/Gears: BW 9bolt with torsen carrier
Re: Afpr

Originally Posted by Komet
You could tee a fuel pressure gauge into the feed line on the driver's side of the engine, I suppose. But, there's no way of telling how much the screw needs to be in or out without a gauge.
Yeah it looks like I'm gonna have to buy a fuel rail just to get another shrader valve port. Can't find one to match those threads. I was just looking for what was average on everybody else's to get it around correct pressure.
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Old Nov 29, 2022 | 02:20 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Afpr

Originally Posted by george88gta
It is tuned for those injectors
if it’s tuned, than once again no need for the bandage afpr.
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Old Nov 29, 2022 | 02:25 PM
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Car: 1988 Pontiac GTA
Engine: 5.7 l98
Transmission: 700r4
Axle/Gears: BW 9bolt with torsen carrier
Re: Afpr

Originally Posted by Tuned Performance
if it’s tuned, than once again no need for the bandage afpr.
I'm not sure what you mean by bandage afpr. I'm just trying to get the fuel pressure in a good range whether that be most people screwing it in 5 turns or all the way out! When I fix the port I will be able to tell I'm just looking for advice on trying to get it within range At the current moment.
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Old Nov 29, 2022 | 02:30 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Afpr

If it’s tuned it’s tuned at 3 bar , increasing it won’t help if it’s tuned properly with datalogging, correct flow rate in constant and correct voltage offsets. Leave it backed off all the way. You complicating things if it was tuned.
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Old Nov 29, 2022 | 02:44 PM
  #11  
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Car: 1988 Pontiac GTA
Engine: 5.7 l98
Transmission: 700r4
Axle/Gears: BW 9bolt with torsen carrier
Re: Afpr

Originally Posted by Tuned Performance
If it’s tuned it’s tuned at 3 bar , increasing it won’t help if it’s tuned properly with datalogging, correct flow rate in constant and correct voltage offsets. Leave it backed off all the way. You complicating things if it was tuned.
OK that's exactly what I needed to know . with the screw backed all the way out it should be stock fp?
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Old Nov 29, 2022 | 02:53 PM
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From: Long Island N.Y
Car: 1988 Pontiac GTA
Engine: 5.7 l98
Transmission: 700r4
Axle/Gears: BW 9bolt with torsen carrier
Re: Afpr

Originally Posted by Tuned Performance
If it’s tuned it’s tuned at 3 bar , increasing it won’t help if it’s tuned properly with datalogging, correct flow rate in constant and correct voltage offsets. Leave it backed off all the way. You complicating things if it was tuned.
Thank you , btw u Wouldn't happen to know where I could get The schrader valve port would ya?
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Old Nov 29, 2022 | 03:02 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Afpr

There discontinued years ago, would need a used rail
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Old Nov 29, 2022 | 03:02 PM
  #14  
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Car: 1988 Pontiac GTA
Engine: 5.7 l98
Transmission: 700r4
Axle/Gears: BW 9bolt with torsen carrier
Re: Afpr

Originally Posted by Tuned Performance
There discontinued years ago, would need a used rail
Thanks again for your help
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Old Nov 30, 2022 | 05:07 PM
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Re: Afpr

Originally Posted by george88gta
I agree, problem is I broke off scrader port so I have it sealed with screw at the moment. Ported tpi top end, 26pd injectors
Hey give us a call....

516-442-4707

Last edited by southbay08; Nov 30, 2022 at 05:11 PM.
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Old Nov 30, 2022 | 10:08 PM
  #16  
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Engine: 5.7 l98
Transmission: 700r4
Axle/Gears: BW 9bolt with torsen carrier
Re: Afpr

Originally Posted by southbay08
Hey give us a call....

516-442-4707
I need housing of the valve. Not the valve itself . I have actually called you about it a few weeks ago.
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