Hey everyone, I recently put a brand new 650 double pumper on my car. When the car is fully warmed up it runs great, much better than my 750 vacuum secondary carb i had. But for some reason if i gas it (before it is fully warmed) i have a really bad stumble or misfire in high rpm WOT position, but not at low rpm WOT.. I found that leaning it up helps out when it is not fully warmed, but hurts performance when it is hot and my spark plugs looked too lean this way, pure white porcelin etc. Seems as if my carb needs to heat soak or something, is this normal?
Car specs
72 duster
400 bored 40 over, shaved 452 heads, comp cam 477/480 lift, weiand dual plane intake with 1" carb spacer, stock exhaust manifolds with 2.5" pipes with summit race mufflers, 727 auto, 323 gears.
stock electronic ignition, blaster coil, 16* initial timing 34* total mechanical. welded up slots to limit mechanical timing
Car specs
72 duster
400 bored 40 over, shaved 452 heads, comp cam 477/480 lift, weiand dual plane intake with 1" carb spacer, stock exhaust manifolds with 2.5" pipes with summit race mufflers, 727 auto, 323 gears.
stock electronic ignition, blaster coil, 16* initial timing 34* total mechanical. welded up slots to limit mechanical timing
