08-28-2003, 04:17 PM
I'm running a pro-billet dist. on a 455 olds jet boat...I'm using the blue bushiing and the 2 light silver springs...According to the booklet, it should give me approx. 25 cent. advance. If I run 8 deg. off the crank, I should have 33 deg. total advance....Under this scenario, some light "pops" come from the carb... Then , if I bump the timing up to say 12-14 off the crank, it runs better (no "poping")...Can I trust the mechanical portion or should I just keep advancing until it pings?...I'm worried about goint too far and burning pistons.....In theory, its about 39 deg. and does run better when I give it more timing. I've been told to run it between 30 and 34, but it just doesn't run well (no power). I don't have a timing light thats adjustable (hard to check it at full throttle).