[Tom Vaught]

Just a quick post and a bit later I will post some other pictures. This post is about the fuel system.

A normal Pontiac Fuel Pump in the old days put out about 6-7 psi of fuel pressure and had a average fuel flow rate for the 1960s time frame.

So if a guy wanted to add a bit of boost (using his Paxton Supercharged Pontiac kit, Yes, Paxton did offered a Pontiac Kit) part of the modifications was adding a nipple to the fuel pump vent or diaphragm housing and run a hose from that nipple to the Paxton Bonnet. So if you had 5 psi in the Bonnet, the Mechanical Fuel Pump saw extra pressure (stock pressure + 5 psi) to the carburetor. The carb fuel bowl still saw 6-7 psi but the actual pressure 5 psi of boost pressure in the bonnet and 5 psi pushing on the fuel pump diaphragm (were fighting each other to a "tie"). That deal works pretty well at a few psi of boost pressure. I have attached a picture of the fuel pump and where the pressure line would connect to the fuel pump and the pressure bonnet.

Tom V.