| Reid Nicks |
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| #1 |
When using the idle bleed, is it by-passing the fuel from the pump side of the regulator or the carb side (Low psi side or high psi side)? I'm assuming that it is the low pressure side or carb side.
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| Howard |
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| #2 |
Reid,
The idle bleed is on the low pressure side of the regulator.
It is simply and orifice that allows fuel to return constantly. Carbureted versions have a #70 Holley jet as the orifice. EFI versions have a #40 Holley jet.
We call in an "Idle Bleed" because while it returns the same amount of fuel at all RPMs, the main benefit is at idle.
Howard Stewart
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| Reid Nicks |
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| #3 |
When using the idle bleed, how much fuel pressure will be seen at idle? Will it depend on what the WOT pressure is set at? If this is so, how much of a pressure difference will be seen from idle to WOT?
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| Howard |
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| #4 |
Reid,
The idle bleed will drop the fuel pressure 2-3 PSI at a low idle. It will have no effect on the fuel pressure at 1200 RPM and above.
Bypass systems need a very low idle pressure because the carburetor is subjected to the pulses of the pump. A dead head system like the Race Pumps regulators place the regulator in between the carburetor and the pump to damp out the pulses from the pump. Carburetors that need 3 PSI to idle properly with a bypass will idle preoperly at up to 8 PSI with the Race Pumps system.
Howard Stewart
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