[Grady Clay]

Jim,

What does that EFI use for a throttle body? Does it have vacuum ports? If you use the Carrera 3.2 throttle body, I suppose you could plumb a check valve into the Aux Air Regulating Valve port (in the L manifold, just below the throttle), to a vacuum reservoir and then to the brake servo. With the OE Fuel Pressure Regulator and the Pressure Damper still in the fuel circuit, they are controlled by the vacuum from the throttle body via a Y-part. You could make that a 4-way “Y” (an “X”) with the additional line to a check valve, reservoir and brake servo.

Do you have a good schematic air/fuel/electrics diagram for the EFI? You are going to want to combine that with the Porsche diagrams for the Carrera 3.2 so you can troubleshoot your system both now and in the next 20+ years.

Best,
Grady