Fuel Pressure Regulator Question
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Joined: May 2008
Posts: 286
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From: Cicero, IL.
Car: 1987 Pontiac Firebird Trans Am WS6
Engine: SBC 350
Transmission: T-56
Axle/Gears: 3.70:1 BW M78 9-Bolt Posi
Fuel Pressure Regulator Question
I’m running a stealth ram with stock TB (‘87) and Holley fuel rail kit 9900-172. The kit comes with an adjustable fpr. I have the vacuum for it running to the very small port on the bottom of the throttle body. Is this an OK location or should it go directly into the upper plenum?
Joined: Nov 2008
Posts: 2,093
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From: Milwaukee
Car: 92 Firebird, 77 Trans Am SE, 86 Z28
Engine: 5.7 HSR, T/A 6.6, empty
Transmission: T-5, TH350, T-5
Axle/Gears: 3.08 posi, 3.23 posi, 3.23
Re: Fuel Pressure Regulator Question
Plenum. The TB is ported vacuum which will have no vacuum signal at idle, therefore full fuel pressure.....at idle when you need the least fuel pressure.
manifold vacuum not ported Thread Starter
Member
Joined: May 2008
Posts: 286
Likes: 1
From: Cicero, IL.
Car: 1987 Pontiac Firebird Trans Am WS6
Engine: SBC 350
Transmission: T-56
Axle/Gears: 3.70:1 BW M78 9-Bolt Posi
Re: Fuel Pressure Regulator Question
Thanks. Could this be the cause of a “surging” I’m experiencing?
Thread Starter
Member
Joined: May 2008
Posts: 286
Likes: 1
From: Cicero, IL.
Car: 1987 Pontiac Firebird Trans Am WS6
Engine: SBC 350
Transmission: T-56
Axle/Gears: 3.70:1 BW M78 9-Bolt Posi
Re: Fuel Pressure Regulator Question
Ok, so another dumb question. Should MAP go to ported or plenum?
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