Disabling LS1 fuel pressure regulator for TPI
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Joined: May 2011
Posts: 94
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From: Corvallis, OR
Car: 87 Iroc
Engine: 5.7L TPI
Transmission: Built 700R4
Axle/Gears: 3.23 posi
Disabling LS1 fuel pressure regulator for TPI
Exactly what the subject says. i need to disable the LS1 regulator so the fuel rail regulator will do the regulatin'. i also need to know if i disable it, is it permanently disabled or can it be re-enabled for later LS1 use? 
Joined: Mar 2000
Posts: 43,187
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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
All you're doing is taking the guts out of a relief valve.
Been awhile, can't remember if it's put together so it can be taken apart and put back together again. My inclination is once it's gutted, it stays gutted.
Been awhile, can't remember if it's put together so it can be taken apart and put back together again. My inclination is once it's gutted, it stays gutted.
Joined: Jun 2006
Posts: 576
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From: Gobles, Michigan
Car: 92 Ttop Z28
Engine: Cammed 6.0
Transmission: T-56
Axle/Gears: Built 10 bolt-3.90s w/ PBR discs
Re: Disabling LS1 fuel pressure regulator for TPI
IIRC, the 99-02 V6 Fbodies had the plastic tank as well, but without a regulator built into the sending unit/pump assembly.
Joined: Sep 1999
Posts: 4,353
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From: NJ
Car: 92 Firebird
Engine: 4.8 LR4
Transmission: T56
Axle/Gears: 3.45 9 Bolt
Re: Disabling LS1 fuel pressure regulator for TPI
The in-tank regulator in the plastic tank is just held in with a clip, you can put it back in later
Thread Starter
Junior Member
Joined: May 2011
Posts: 94
Likes: 0
From: Corvallis, OR
Car: 87 Iroc
Engine: 5.7L TPI
Transmission: Built 700R4
Axle/Gears: 3.23 posi
Re: Disabling LS1 fuel pressure regulator for TPI
Thanks for the replies everyone, we decided not to drop the tank and just wait to put in the LS1 during spring break or summer
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