Fuel pressure issues with forced induction
#1
Staging Lane
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Fuel pressure issues with forced induction
I have a 2000 Trans Am with a vortech supercharger putting out 6 lbs of boost. I just bought the car and was told it needed a new fuel pump so because the fuel pressure dropped from about 54 at idle to 45 under WOT. I bought a racetronix pump with a hotwire kit and now I am still getting the same problem. The car runs very strong and pulls hard...no hesitation or sputtering is going on. I was told I do not need a boost reference regulator due to the fact that I am not putting out that much boost. I am going to replace the fuel filter this week but I do not think that is the problem. Any help would be appreciated. I have also posted this under the fueling and injection section but thought maybe someone with forced induction would know a little bit more about my situation.
#3
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I had this similar problem on my 01,Install two pumps and have the primary come on with the switch as normal.The second Ive got power to it via a hobbs switch.Go to the twin walboro install and it will solve your problems.I tried all the same things, drop the tank about 4 times and finally did this install.Its nothing to it just take your time.
#7
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A stock setup should not drop to 45 psi. Maybe 2-3 psi. If you're dropping 15 psi then you have a problem with a restriction in the line, the stock regulator is bad or there is a problem with the hot wire. Not sure that even if those 42# inj were going static that they could pull the fuel pressure that low (when everything is working right). What power level are you at?
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#8
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A stock setup should not drop to 45 psi. Maybe 2-3 psi. If you're dropping 15 psi then you have a problem with a restriction in the line, the stock regulator is bad or there is a problem with the hot wire. Not sure that even if those 42# inj were going static that they could pull the fuel pressure that low (when everything is working right). What power level are you at?
#12
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I don't see how it wouldn't. There is positive pressure underneath the injectors reducing fuel pressure in that amount of the boost. I was under the impression that it was the purpose of having a boost ref reg after the rails, to get rid of the drop and have a steady fuel pressure, and in boosted applications compensate for the positive pressure created
#13
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I don't see how it wouldn't. There is positive pressure underneath the injectors reducing fuel pressure in that amount of the boost. I was under the impression that it was the purpose of having a boost ref reg after the rails, to get rid of the drop and have a steady fuel pressure, and in boosted applications compensate for the positive pressure created