I have a 21' open bow Hawaiian with a 468 BBC, brodix heads, Victor jr 454-R, roller cam 600" lift, MSD with an Accel coil, lightning headers, Dminator 12-TD pump.
She pulls 5800rpm @ 71-73mph. At an idle I get a lot of miss firing, popping and flooding. Once you get it above 1500rpm for 10-15sec she cleans up and runs good from there. When I slow down to stop smell a lot of fuel, with the occasional diesel. The carb is a 750 Holley, 4 corner idle, no choke, no power vavles, blocked, 88 jets front and rear. I tried power vavles and smaller jets and I had to floor the thing to get it on plane!
Any help would be oppreciated. Thanks
The fuel pressure is 5 1/2 psi (elec pump), floates are correct just below float screw window, does not boil over or leak from vent tubes. Plugs appear fowled... running NGK 8 Vpower plugs, gapped at .050. Should I try a differant plug or heat range?