Stock: AC Delco 41-985 Iridium .040 gap
NGK direct replacement: TR55 .050 gap
NGK 1 step colder: TR6 .035 gap

and why?

 

Stock plug, stock gap.

Because I said so.

 

we'll see when I check them

 

TR6's gapped at .35 for added insurance.

Made the same power on the dyno as the stockers.

 

bosch +4's

because i fucked up my TR6's.... heheh

 

tr 6 @32 because platinum plugs cause LS1s to detonate. Duhh

 

I'm running stock now, but I've got both TR6IX's and regular TR6's available to go in (don't ask why). This is good timing, I'm wondering which of the two would work better (or are they the same....with the IX's just lasting longer?).

 

As long as its colder then stock an not platinum youll be good.

 

thats what I get for not calling, Pep Boys and Kragen don't stock them

 

You are always one step behind.... I installed a set of TR6IX plugs last night. I pulled out a 12K mile set of plain TR6s. Can't give a good answer why I chose the IX plugs besides the possibility of longer life and the strength of iridium.