artificialreef
Chief Petty Officer
- Joined
- Feb 21, 2009
- Messages
- 504
Hello Folks. Trying to dial in my tired 470. Looks like alot of hours on her but good compression 146 to 150lbs. 1983. Looks like original motor. I had trouble getting it close to the 4 degrees timing and 28 to 32 dwell so bought a new mallory dizzy. The old one seemed to be all over the place. It now sits at 30 degrees dwell and around 5 degrees timing but backfires and pops when i give it throttle. It doesnt when its set at 10 or 12 degrees timing. I rebuilt the carb but it was only my second rebuild. I dont think the choke is working but it still pops after its warmed up. I guess my question is.
Could a carb cause this backfiring when all the specs are correct? I could have botched the rebuild but dont want to go tearing into the carb again for no reason. I get a nice spray when i throttle it. Its a 2 barrel and i also adjusted the screws at the base according to the manual.
Thank you in advance for your gracious responces.
Could a carb cause this backfiring when all the specs are correct? I could have botched the rebuild but dont want to go tearing into the carb again for no reason. I get a nice spray when i throttle it. Its a 2 barrel and i also adjusted the screws at the base according to the manual.
Thank you in advance for your gracious responces.