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304065 304065 is offline
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Join Date: Dec 2001
Posts: 9,509
I don't follow you fellas.

He's using a bypass regulator that has two return ports. One of the return ports has a plug in it. The other goes back to the tank.

The diagram does NOT show a "dead-head" type regulator that is essentially a flow restrictor, which can cause the pressure to spike between the pump and the dead head regulator. If this were the case, the fuel pressure gauges on either side of the MFI pump would show the increase.

You are using a Holley BLUE pump? A Holley 12-802-1, with the regulator that came with it?

Improved design for street/strip applications.
Distinctive "BLUE" logo.
Flows 110 GPH (free flow).
Flows 88 GPH at 9 PSI.
Maximum pressure is 14 PSI.
Includes P/N 12-803 fuel pressure regulator

This pump and regulator are only good for 14 psi. This is the problem. You are asking the pump to put out its maximum pressure.

Go with the Walbro pump in the black box.
'66 911 #304065 Irischgruen
Ex-'71 911 PCA C-Stock Club Racer #806 (Sold 5/15/13)
Ex-'88 Carrera (Sold 3/29/02)
Ex-'91 Carrera 2 Cabriolet (Sold 8/20/04)
Old 01-26-2004, 04:37 PM
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