zinser72
Well-Known Member
I recently got my 318 on the road, heres my combo in detail or skip to the bottom paragraph for the short version:
Engine:
'72 318, .030 over, kb167's zero decked, scat i-beam rods, forged crank, fully ported EQ heads with 2.02 intakes, voodoo hyd roller cam (.535IN/.550EX 231IN/239EX dur @ .050) 10.1 static compression, roller rockers, 978 dual springs, msd street fire box with electronic ignition, rpm air gap intake and, a holley 750 double pumper with proform main body and billet metering blocks with 4 corner idle adjustment.
Carb setup:
mains 73, secondaries 82, power valve is 4.5 in/hg, primary air screws are 1 7/8 turns out, sec are 1 out. secondary jets are on standoffs, primary throttle plates are drilled about 3/32" one hole in each. primary bowl level is 2/3 up sight glass and secondary level is halfway.
Timing:
18* initial, mech curve starts to ramp up at about 2500 and hits 36* all in at 3800.
i wanted to hook up the vacuum advance but when i put a gauge on the ported vacuum port in the side of the metering block it stayed at 0 while driving around. direct vacuum gave me these numbers: idle 12", cruise 15", and coasting (4spd) 20"
shouldnt ported vacuum be active while your driving but be zero at idle? im confused. i just want to get the vacuum advance working to improve its manners and it also seems a little lean which i think is weird. i havent even got on it hard yet because it feels like its bogging and i dont want to cause any issues. Any input at all is greatly appreciated, thanks in advance! :thumblef:
Engine:
'72 318, .030 over, kb167's zero decked, scat i-beam rods, forged crank, fully ported EQ heads with 2.02 intakes, voodoo hyd roller cam (.535IN/.550EX 231IN/239EX dur @ .050) 10.1 static compression, roller rockers, 978 dual springs, msd street fire box with electronic ignition, rpm air gap intake and, a holley 750 double pumper with proform main body and billet metering blocks with 4 corner idle adjustment.
Carb setup:
mains 73, secondaries 82, power valve is 4.5 in/hg, primary air screws are 1 7/8 turns out, sec are 1 out. secondary jets are on standoffs, primary throttle plates are drilled about 3/32" one hole in each. primary bowl level is 2/3 up sight glass and secondary level is halfway.
Timing:
18* initial, mech curve starts to ramp up at about 2500 and hits 36* all in at 3800.
i wanted to hook up the vacuum advance but when i put a gauge on the ported vacuum port in the side of the metering block it stayed at 0 while driving around. direct vacuum gave me these numbers: idle 12", cruise 15", and coasting (4spd) 20"
shouldnt ported vacuum be active while your driving but be zero at idle? im confused. i just want to get the vacuum advance working to improve its manners and it also seems a little lean which i think is weird. i havent even got on it hard yet because it feels like its bogging and i dont want to cause any issues. Any input at all is greatly appreciated, thanks in advance! :thumblef: