What to set FP at?
- Thread starter 1992blkGT
- Start date
38-40psi is stock. I would set it there and your computer will balance it out for normal driving. If you run rich at WOT, back it off a few.
BlackFox5.0
Founding Member
1992blkgt,
If you have the FP close to 37# the PCM can adjust +/-10% to compensate for errors. The best way to tell if you're running rich is with a WBo2, if you don't have one try smelling your exhaust, it should only smell slightly like fuel when cold, other than that it shouldn't smell like fuel. Check your plugs, the white ceramic should be white if your running Stoich most of the time, however, also check the metal ground bar on the plug it should be tan or light brown indicating that overall you're ok. If you have good o2 sensors the PCM cam learn and correct for proper mixture unless you have a SC or Turbo then things get pretty tough for the PCM to figure out, this is where a WBo2 is mandatory. Also pinging could indicate lean or too much timing.
Good Luck, Don
Mods
Engine: 306 ci NA w/ timing at 18*, Sterling pistons H273CP w/8.9:1 compression, FMS Harmonic balancer, Edelbrock 6037 heads w/2.02" intake valves, Edelbrock performer intake manifold, FMS 1.6 roller rockers, Crane 444221 (2030) 216/220 @ 0.05" with 112 lobe separation 0.533"/0.544" lift, FMS aluminum radiator, Lincoln Mark VIII electric fan, Performance Distributors TFI and Screem’n Demon coil, FMS 9mm plug wires.
Fuel and Air: 24# FMS injectors, Edelbrock 70mm TB, C&L 73mm MAF, stock fuel pressure regulator, 195 lph fuel pump, MAC CAI.
Exhaust: 1 5/8" BBK ceramic coated headers, MagnaFlow SS 2 1/2” catback and X-pipe w/Cats.
Drive Train: D&P Products 2500 RPM stall 9 1/2” torque converter w/damper, AOD w/ TransGo HP shiftkit, Earl’s 19 row transmission cooler, FMS 3.73 gears, FMS aluminum driveshaft.
Wheels and Tires: 17” x 9” Replica Cobra R, 555 Nitto Extreme 255/40ZR17 rear & 235/45ZR17 front.
Brakes: Hawk HPS pads, Front 73mm calipers from 1991 Lincoln Mark VII, Sn95 MC w/3-2 port conversion & Russell SS hoses.
Chassis: FMS Subframe connectors, FMS upper control arms, MM lower control arms, Energy Suspension engine, transmission and front sway bar mounts.
If you have the FP close to 37# the PCM can adjust +/-10% to compensate for errors. The best way to tell if you're running rich is with a WBo2, if you don't have one try smelling your exhaust, it should only smell slightly like fuel when cold, other than that it shouldn't smell like fuel. Check your plugs, the white ceramic should be white if your running Stoich most of the time, however, also check the metal ground bar on the plug it should be tan or light brown indicating that overall you're ok. If you have good o2 sensors the PCM cam learn and correct for proper mixture unless you have a SC or Turbo then things get pretty tough for the PCM to figure out, this is where a WBo2 is mandatory. Also pinging could indicate lean or too much timing.
Good Luck, Don
Mods
Engine: 306 ci NA w/ timing at 18*, Sterling pistons H273CP w/8.9:1 compression, FMS Harmonic balancer, Edelbrock 6037 heads w/2.02" intake valves, Edelbrock performer intake manifold, FMS 1.6 roller rockers, Crane 444221 (2030) 216/220 @ 0.05" with 112 lobe separation 0.533"/0.544" lift, FMS aluminum radiator, Lincoln Mark VIII electric fan, Performance Distributors TFI and Screem’n Demon coil, FMS 9mm plug wires.
Fuel and Air: 24# FMS injectors, Edelbrock 70mm TB, C&L 73mm MAF, stock fuel pressure regulator, 195 lph fuel pump, MAC CAI.
Exhaust: 1 5/8" BBK ceramic coated headers, MagnaFlow SS 2 1/2” catback and X-pipe w/Cats.
Drive Train: D&P Products 2500 RPM stall 9 1/2” torque converter w/damper, AOD w/ TransGo HP shiftkit, Earl’s 19 row transmission cooler, FMS 3.73 gears, FMS aluminum driveshaft.
Wheels and Tires: 17” x 9” Replica Cobra R, 555 Nitto Extreme 255/40ZR17 rear & 235/45ZR17 front.
Brakes: Hawk HPS pads, Front 73mm calipers from 1991 Lincoln Mark VII, Sn95 MC w/3-2 port conversion & Russell SS hoses.
Chassis: FMS Subframe connectors, FMS upper control arms, MM lower control arms, Energy Suspension engine, transmission and front sway bar mounts.
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