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VAFC install with Vortech SC & Black Box?

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Old 07-28-2003, 12:14 PM
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this is not a FI question it is a electronics question. So you did clarify the question to a point.
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Old 07-28-2003, 01:13 PM
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Originally posted by CMiS2K
I was thinking that the black box just sends a message to the fuel pump to increase fuel and then the FMU created more vaccum for the stock pressure regulator.
On this, I can clarify. No signal is sent to change the way the fuel pump operates. It is pumping at more or less the same pressure all the time. It is the FMU that changes the pressure in the fuel rail and the FMU is controlled by vacuum (or boost) as sensed directly from the intake manifold. The stock regulator becomes defunct when boost is detected. It's like putting a bigger dam downstream of the smaller dam (stock reg.).
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Old 07-28-2003, 01:26 PM
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xviper,

Why was the fuel pump upgraded if there is no signal telling it up the PSI inorder to deliver more fuel?
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Old 07-28-2003, 01:35 PM
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It delivers more fuel all the time. The FMU is what controls the pressure by allowing unneeded fuel to flow back to the tank.
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Old 07-28-2003, 01:47 PM
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[QUOTE]Originally posted by gernby
[B]It delivers more fuel all the time.
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Old 07-28-2003, 01:58 PM
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I know Jack Schitt. He and I go way back.
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Old 07-28-2003, 02:06 PM
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jack and I know each other really well also. That is why I am asking these questions.
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