Ngk Tr6

With my setup, see link below, how would the TR6 work NA? How is the heat range compared to a AC 45?

http://www.enginecombination.com/viewtopic.php?t=22

I dont have a user name or password to log in..... but I run NGK TR-6's on my 383. With 11.25 to 1 compression.

A general rule of thumb with plug choice, is that when you go beyond 400 fly wheel hp, it is good to go down a heat range to help control combustion. I used them and like them alot.

When I blow n20, i will try their NGK TR-6 Iridium plugs.

Thanks!