dj65falcon
Well-known member
Ok guys I need some help. Got a 65 falcon wagon with a 300 in it with a Paxton supercharger. Just got the motor togetter. Put the blow Thur hat and hook the the piping. Have a areomotive boost reference fuel pressure gauge. I have an autometer air fuel ratio gauge.the O2 sensor hook up by the collector on the primary side of the header meaning it's running off the 1 2 3 cylinders of the front engine .And I am running dual exhaust. when I rev the motor up in idle. the fuel pressure gauge goes up so I know it's working..when I took it out the tested it. I got on it. the fuel pressure gauge want to 11 but my air fuel ratio was on the lean side it was showing 17 so I back it off. My boost gauge whole 5 lb of boost. The fuel pressure set at 6 PSI. the carburetor is a Holley 650 double pumper what's 67 Jets upfront and 74 jets in the rear. Wondering why I ran it ran lean but still had fuel pressure going up. Do I need to up on the Jets and go higher? if anybody can help me on this I work preciate it and I did check all the plugs and they're all coffee cream colored but none of the electrodes were burnt off. Thanks