> On Thu, 26 Oct 2006, Jim Blair wrote: > > > The vacuum advance would be your extra degrees for "total" > > Well, yes and no, from what I can tell. > > I know I'm not racing, though WOT simulates it a bit; zero > vacuum, timing is static+mechanical. I believe under this > circumstance I should be able to run 36 - 38 degrees total > advance (for the six). I've been sick (nasty headcold) and that stopped me cold on working on the car. Turns out I have RC12LYC Champion plugs in there. The "L" means extended electrode; I got them from a local parts store by looking up "83 Jeep". They should be RC12YC, not "L". Either they didn't notice the L, or they substituted, and I wasn't paying attention. So I've mailordered RC9YC's, and will play with timing with these colder plugs when those arrive. I'm thinking that the absolute best way to determine optimum ignition timing for a given set of circumstances is exhaust gas temperature. I'm not likely to do anything about that, but I might look around to see if there's a temp probe that fits in an oxy sensor bung hole. _______________________________________________ AMC-List mailing list AMC-List@xxxxxxxxxxxx http://www.amc-list.com/mailman/listinfo/amc-list or go to http://www.amc-list.com