Ok, right now i have some autolights(i forgot what kind) they work fine...however, with my new TT, WHat plugs should i run? Im guessing a heat range or 2 colder? Just trying to get some info from the boosted gt40p guys.
For my gt40 heads the stock plug in an NGK is a TR5, I ran a one step colder as I have a bottle that made my plug a TR6 (they are backward in numbers from everyone else). In order to go 2 steps colder you have to get irrid.(sp?) plugs and that is a TRi7. I called the NGK tek. number and they said they do not make a copper TR7.
You would prob. want to gap the plugs alittle closer to 35-40ish, but I will wait for the blower guys to step in on that.