View Single Post
Old 02-13-2013, 09:48 AM   #7
fleetsidelarry
Senior Car Nut
 
fleetsidelarry's Avatar
 
Join Date: Jan 2008
Location: shellman bluff, GA
Posts: 1,411
Re: Help with timing issue

Quote:
Originally Posted by DoubleL View Post
I set the timing at 4 degrees advanced with vac advance plugged but when I reconnected it the timing jumped and advanced past the "A" setting on the indicator. It probably advanced 16-18 degrees when I plugged it in.
That's how it's supposed to function, DoubleL. There's nothing wrong with pulling that much advance at idle unless you are concerned with meeting emissions requirements and have all the other emissions equipment. the vacuum advance mechanism also retards the timing when the engine demands it. when you put a load on the engine, vacuum drops momentarily, causing a corresponding drop in the amount of advance.

once off-idle, it shouldn't matter whether you're on ported or full manifold. I'd say try it both ways, starting with your original 4° initial setting.
__________________
Larry
fleetsidelarry is offline   Reply With Quote