EDIT: It's not totally fixed haha false alarm. For the most part detination went way by limiting the advance. Right now I'm at 42 total including vac advance. That means my vac advance is limited to 10*. I can still however hear a slight bit of what I think is pre-ignition. It's so faint I think I might just be paranoid. I do think it is something tho because it doesn't really happen when going downhill, mostly just uphill.
Possible reasons I've been thinking about
1: I'm 1 jet size too lean, should try going from a 72 jet to a 73
2: Vacuum advance rateis comming in too early.
3: Secondaries might be trying to open up some and leaning it out. I have the purple spring in it right now.
4: What oldbogie was saying about fuel loosing velocity.
5: I have a hot spot somewhere in the cylinder. Some of my plugs have dark burns on the insulators. Also sometimes it will try to diesel after I cut the ignition. No idea what's up with that.
Also, I'm running 93 octane that has the 10% ethanol in it.
Last edited by kyle86; 07-12-2010 at 11:43 PM.