Offshoreonly.com - Maximum afrs in individual cylinders

Quote:

Originally Posted by Rookie (Post 4624727)

Smitty,
Excuse my ignorance, but are all O2's equidistant? Could some cylinders be burning more or less in the pipe? Or, is 1 cylinder just scavenging more from the other, or fuel distribution from the carb? How tall carb spacers are you using? I have some 3" and 4" spacers Jim designed I could send you. You obviously you have the technology to monitor, what would a colder plug do in those high cylinders more or less burn?
Just throwing out thoughts. Probably some dumb ones. lol
(Now we are all worried about our builds after your findings) :)

yes, all 02s are as close to equally distanced from head as possible. I dont feel what im seeing is anything new, just no one measured this much till recent past. We'v sll seen Egts vary from high 1100s to 1400s on open plenum single 4bbl.motors, so we we would stagger jet motor a little, egt would maybe drop a titch snd we'd call it done. So, when we saw egts at 1380/1400 on 7/8 in past , what afr were THOSE cylinders at, i bet it wasnt 12.5! So, if they were at 14-1 at wot and lasted years, thats the question.