Upgrading lines pump for future?
Thread Starter
Joined: Mar 2003
Posts: 1,149
Likes: 1
From: Gladstone, Missouri
Car: 91 Camaro RS
Engine: 5.0L TBI (ebl inside)
Transmission: T-5
Axle/Gears: 3.42 lsd 10 bolt
Upgrading lines pump for future?
Eventually, I was thinking of changing to a high pressure form of fuel injection, (I know TBI board doesn't like that). I like to space my projects out, so here is my question: Can I change all my fuel lines and pump and get the pressure down to work with TBI until I change injection/ engine without to much work? Has anyone else done this?
Supreme Member
Joined: Dec 2001
Posts: 1,418
Likes: 1
From: Morris, IL
Car: '91 t-top RS; '91 hrdtp Z28
Engine: LO3;383tpi
Transmission: 700r4;very nice 700r4
Axle/Gears: 4.10 zt posi, 3.70 auburn
yes and yes. I, and several others are running the Walbro 255. I run the high pressure unit capable of 90psi or something. The pressure regulator will take care of the fuel pressure
Supreme Member


Joined: Apr 2001
Posts: 1,342
Likes: 14
From: Dayton, O.
Car: 91 Camaro Z28
Engine: LS7
Transmission: M12/T56
Axle/Gears: 3.79
Yep, the walbro is where its at
I dont know if you have to change lines though, I read that the stock ones were capable of flowing ~500 hp, but obviously I dont have first hand expirence.
I dont know if you have to change lines though, I read that the stock ones were capable of flowing ~500 hp, but obviously I dont have first hand expirence. Supreme Member
Joined: Dec 2001
Posts: 1,418
Likes: 1
From: Morris, IL
Car: '91 t-top RS; '91 hrdtp Z28
Engine: LO3;383tpi
Transmission: 700r4;very nice 700r4
Axle/Gears: 4.10 zt posi, 3.70 auburn
You definetely want to change the rubber hose going from the sending unit to the pump with a new one with a braided sleeve. I found this out the hard way. It's also the time to check the sending unit lines.
Supreme Member


Joined: Apr 2001
Posts: 1,342
Likes: 14
From: Dayton, O.
Car: 91 Camaro Z28
Engine: LS7
Transmission: M12/T56
Axle/Gears: 3.79
Im tryin to remeber what my kit came with. A new o-ring, rubber collar type thing and then a new rubber hose, havnt had problems with it for about 1k miles.
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