For being a small operation, Cartuning (Kevin) isn't on top of his game very much. I ordered a turbo from him about 10 days ago, just the unit since I got a used kit but the turbo unit itself was shot, and I'm still waiting!
Anyway, could you state the plug's nomenclature? Thanks!

 

If you're going with Autolite copper plugs, you'd either be using the 104 or the 103 (103's are pretty cold, and would be better in a higher power setup).

 

from hottest to coldest it goes (for autolite copper plugs):

606
605
104
103

There's more options, but 606 is the stock heat range, and the 103's are what most people run on pretty extreme setups.

-Riggs.

 

Since I'm having a bit of trouble getting a hold of Kevin at cartuning I'll probably try the 103's first and then the 104's, and see what develops. It should be fun!

 

Honestly, I'd probably suggest going the other way- try the 104's first and see what the plugs look like.

 

you're right, I should go with the 104's first. I'm going to be monitoring the engine anyway and I'll be able to check the timing and afr, and performed corrections as necessary.