Depends on what wires you're using and what cables, I presume that you have non resistor wires and the autolites were resistor plugs, the motomaster and champions were not resistor plugs, hence the interference. ----- Original Message ----- From: "James" <nyb@xxxxxxx> To: <mailing-list@xxxxxxxxxxxxxxxx> Sent: Tuesday, February 26, 2002 5:41 PM Subject: IML: autolites > On the topic of plugs, the most interesting change I noticed when I > changed to autolite plugs was the very distinct drop in interference on > the AM dial. The champions and motomaster plugs were really bad for > this. > > James > > Robert Dervin wrote: > > > > Already tried the Autolite thing (3 different heat ranges), the Champion > > thing, the Bosch thing, the retarded timing thing. Actually spent 55 > > exhaustive hours on a chassis dyno logging and adjusting total advance with > > a knock sensor and an exhaust gas analyzer. With this vehicle, Splitfires at > > a .40 gap have the least amount of ping. Champions had the most amount of > > ping. Ended up at 6 degrees BTC initial and 19 degrees total advance at an > > early 1500 rpm. Logged 245 hp at the rear wheels @4200 rpm. > > > > Also installed a Pertronix electronic ignition module and a 40,000 volt > > coil. > > > >