To vacuum, or not to vacuum FPR
Thread Starter
Joined: Sep 2007
Posts: 533
Likes: 0
From: Crestview, FL.
Car: 1989 IROC-Z, 1979 Malibu Classic
Engine: LSx 5.3
Transmission: MN12 6-speed, 4L60E
Axle/Gears: 4th gen 3.42
To vacuum, or not to vacuum FPR
Would like to know from people who are running an aftermarket fuel pressure regulator such as the below if you are running a vacuum line or if you are leaving it open to the atmosphere?
Thanks, Dan
Thanks, Dan
Thread Starter
Joined: Sep 2007
Posts: 533
Likes: 0
From: Crestview, FL.
Car: 1989 IROC-Z, 1979 Malibu Classic
Engine: LSx 5.3
Transmission: MN12 6-speed, 4L60E
Axle/Gears: 4th gen 3.42
Re: To vacuum, or not to vacuum FPR
Well.... I guess nobody has one. On another note, I ran the car for about an hour last night and it seems it's doing just fine without a vacuum line.
Joined: Mar 2000
Posts: 43,187
Likes: 46
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Unlike TPI or boosted carb, the LSx operates at constant pressure. So, cap the vacuum port.
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