max fuel pressure for TBI??
Member
Joined: Aug 2003
Posts: 344
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From: Panama City, Fl
Car: '89 Formula, '97 Z28, '88 Formula 350
Engine: 305 TBI(LO3)
Transmission: TH700R4(MD8)
The pump won't raise your pressure. If your going to keep an in-tank pump I'd go with a Walbro HP 255lph. You'll have to get an adjustable regulator or do the mod listed on the Ultimite TBI tech page to make the factory regulator adjustable to raise or lower your pressure. I'm not sure how high of pressure the TBI can stand.
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
I had mine running at 25 psi for a little while after I installed the new spring. It didn't cure the knock problem though, so it's back to 22.5 psi, which I have ran for a long time. Only problem I have noticed with running higher pressures with tbi is fuel bouncing off the throttle blades at idle.
Senior Member
Joined: Oct 1999
Posts: 6,621
Likes: 2
Car: 91 Red Sled
Axle/Gears: 10bolt Richmond 3.73 Torsen
Originally posted by r90camarors
I had mine running at 25 psi for a little while after I installed the new spring. It didn't cure the knock problem though, so it's back to 22.5 psi, which I have ran for a long time. Only problem I have noticed with running higher pressures with tbi is fuel bouncing off the throttle blades at idle.
I had mine running at 25 psi for a little while after I installed the new spring. It didn't cure the knock problem though, so it's back to 22.5 psi, which I have ran for a long time. Only problem I have noticed with running higher pressures with tbi is fuel bouncing off the throttle blades at idle.
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92camaroJoe
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Aug 13, 2015 06:07 AM
