Originally Posted by bubbahotep
Is 15' intial and 32' total correct for your engine? I thought a 383 would be at 20' idle 36-38' total.
Edit: the reason I ask is because I had my 383 at low timing once and that forced me to have my idle-speed screw on the carb set too far down (to raise my rpm). I had similar issues as you. This board solved all that
It's been higher. I've ran 22 initial and 36 total before with good results. That was in the winter though, during this heat, I've been having to run around 19 initial and 36 total. What happened was I got bad gas a couple weeks ago and had to back off the timing 4 degrees to stay out of destination in this 90 degree weather. I figured I would just leave it at 15/32 for street driving in case it happens again.
I did have to idle up the screw to compensate for the lost rpm. I've been contemplating on pulling off the carb and using the secondry throttle blade adjustment to let more air in at idle. Never messed with that before tho.