Afpr
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Joined: Jan 2003
Posts: 464
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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?
I am currently unable to check fuel pressure. Want a good starting point. I assume right turns of screw increases pressure. Correct?
Joined: Dec 2004
Posts: 16,906
Likes: 1,014
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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Joined: Jan 2003
Posts: 464
Likes: 23
From: Long Island N.Y
Car: 1988 Pontiac GTA
Engine: 5.7 l98
Transmission: 700r4
Axle/Gears: BW 9bolt with torsen carrier
Re: Afpr
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
Joined: Dec 2004
Posts: 16,906
Likes: 1,014
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Afpr
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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Joined: Feb 2021
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From: WA
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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Member




Joined: Jan 2003
Posts: 464
Likes: 23
From: Long Island N.Y
Car: 1988 Pontiac GTA
Engine: 5.7 l98
Transmission: 700r4
Axle/Gears: BW 9bolt with torsen carrier
Thread Starter
Member




Joined: Jan 2003
Posts: 464
Likes: 23
From: Long Island N.Y
Car: 1988 Pontiac GTA
Engine: 5.7 l98
Transmission: 700r4
Axle/Gears: BW 9bolt with torsen carrier
Re: Afpr
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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Joined: Dec 2004
Posts: 16,906
Likes: 1,014
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Thread Starter
Member




Joined: Jan 2003
Posts: 464
Likes: 23
From: Long Island N.Y
Car: 1988 Pontiac GTA
Engine: 5.7 l98
Transmission: 700r4
Axle/Gears: BW 9bolt with torsen carrier
Re: 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.
Joined: Dec 2004
Posts: 16,906
Likes: 1,014
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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Member




Joined: Jan 2003
Posts: 464
Likes: 23
From: Long Island N.Y
Car: 1988 Pontiac GTA
Engine: 5.7 l98
Transmission: 700r4
Axle/Gears: BW 9bolt with torsen carrier
Re: Afpr
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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Joined: Jan 2003
Posts: 464
Likes: 23
From: Long Island N.Y
Car: 1988 Pontiac GTA
Engine: 5.7 l98
Transmission: 700r4
Axle/Gears: BW 9bolt with torsen carrier
Re: Afpr
Thread Starter
Member




Joined: Jan 2003
Posts: 464
Likes: 23
From: Long Island N.Y
Car: 1988 Pontiac GTA
Engine: 5.7 l98
Transmission: 700r4
Axle/Gears: BW 9bolt with torsen carrier
Thread Starter
Member




Joined: Jan 2003
Posts: 464
Likes: 23
From: Long Island N.Y
Car: 1988 Pontiac GTA
Engine: 5.7 l98
Transmission: 700r4
Axle/Gears: BW 9bolt with torsen carrier
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