What plugs are you all using these days.
DeJa'Vu (I just put this in the last thread) I'm a fan of NGK Iridium. Heat range: I use the 7's. Lower number has more thermal isolation from head and runs hotter. Autostrada, autobahn or track ---> 8 , Slow running, or maybe a bit of oil present, ----> 6 or 5. As far as gap: the MSD puts out a strong spark, and can jump what ever gap you challenge it with. Larger gap means higher spark voltage which is harder on ignition components. I've been at .028" w good results. Curious what others suggest.
I have ngk iridium 8s on the shelf so will put those in. I remember years ago 8 fouled up at ties so went to 7s. slow running or a bit Of oil present I guess 7s. Mostky not slow running, but backroads so only 3rd and 4th 3500-6500 rpm.
I use NGK BP7ES in my BBi. I haven't had any issues, but I've also not experimented much to see if there's a better choice.
Got some BPR7Es. Just finishing up the neatening and hiding of the wiring from the MSD. Will do the plugs and see how it all runs tomorrow am.
Oh right, I forgot about that (I have a few spare sets). Curious empirical evidence from everyone else, but I wonder if 5k spark + 5k extension + older wires + misc. (oxidized distributor cap, etc. etc.) can make ignition flaky.
Robert: to address your question about "flaky" ignition, the answer is absolutely! We routinely resistance test the spark plug wires on every car. Many times the wire itself is OK, but the connectors on the ends are not secure and making good contact.
Sorry, that's a term we use in code to describe code that is unpredictable (sometimes works, sometimes fails).
You both raise some very good points. My drive indicated that some response was a little soft(could also be a hot humd day and I think its a little rich). I see you can get the correct champion and non resistor NGK plugs from the UK, seems the old british Motorcycle electrics there have ignition issues with resistor plugs lol, so the non resisters are available . Im going to order a set of non resistor plugs, certainly cant do any harm.
Boxerman: I agree with you. We have always preferred to use non-resistor plugs any time we can. However, in all honesty, I have never encountered an ignition problem I could trace to the use of resistor plugs. We have actually had a lot more trouble with the Bakelite spark plug connectors going bad.
