Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - lean mixture?
Thread: lean mixture?
View Single Post
  #39 (permalink)  
Old 01-28-2013, 01:53 PM
cobalt327's Avatar
cobalt327 cobalt327 is offline
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Posts: 5,031
Wiki Edits: 1616

Thanks: 128
Thanked 616 Times in 565 Posts
Originally Posted by jeepers creepers View Post
Timing is now set about 12* (initial), but i will try to get it more advance like you said, tried to disconnect the vacuum hose and there was no difference at all at idle, any suggestion?
thank you.
If you add initial, be sure to recheck the total timing (w/o vacuum advance, vacuum line plugged). Keep the total under 36 degrees for non fast burn chamber heads, 30-32 degrees for fast burn.

If you have no change when the vacuum advance is disconnected, you're either using ported vacuum or the vacuum advance unit is bad or the advance plate is hanging up. Try hooking it up to a vacuum port that has vacuum at idle (manifold vacuum).
Reply With Quote