Originally Posted by little rotor' date='Oct 29 2003, 08:48 PM
Shouldn't the regulator just allow the extra fuel to flow down the return line to keep the desired pressure? i.e its not just a fixed size hole. Obviously at some point you would get to the point where the regulator could physically not pass enough fuel to maitain the desired pressure, but this would be more of an issue at idle when the injectors are not passing much fuel and if the two stage pump speed is not being used.
In regard to JSpecs post, I realise you will have higher fuel pressure at higher boost, my question was relating to the effect of changing the fuel pump only. I give this info as FACT because I have actually seen it many times, I didn't read it in a book and I didn't give it as an opinion or theorize it. |
You need an intercooler bad. I'd keep it at 10 psi untill you can build up the fuel system and get a proper intercooler.
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Hmm. I assumed that a FPR would be a bit more technical than that. Guess I'll have to pull one apart some time. I'll be putting a higher flowing pump in a car next week, so I'll pay close attention to exactly what the pressures are before and after. For now, I guess I'll take your word for it.
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Originally Posted by IGY' date='Oct 29 2003, 05:23 AM
[quote name='sleeper7' date='Oct 29 2003, 06:54 PM'] Is what I think should of been said was, with a bigger fuel pump you increase fuel volume, not pressure. The stock fuel pump runs out of fuel under higher boost. Just my .2 cents
chuck It makes sense. I have 2 fuel pumps on my car now and the fuel pressure rose 15 psi and stayed there. It doesn't drop anymore, plus I have it wired to the battery. |
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