Well since I just installed a 2.7 upper to go with the 5# lower, that should be like 8#s over stock, with an agressive racing program, what plugs should I be using? Im currently using TR6s, are those good or to hot? What is recomended? Either NGKs or Densos.

 

You should be ok running the TR6's But if you feel like tackling a plug swap again I'd go with Denso IT22's maybe even IT24's

 

I have a 5 lb lower and run NGK BR7EFs and they have been great. I have a set of Denso IT24s waitin' to go in............

Dan

 

I'm running 20psi + with TR6's for some time now. Contact the guy who does your chip and ask him what you should use.