05-22-2007, 02:58 PM
I am going to be running a vortech v9 aftercooled system. It will be on 9lbs of boost. Gonna be only in the range of 500 rwhp. I have read through old threads about the spark plugs. The consensus seems to be that people like the NGK tr6's quite a bit. This is a 2001 ls1 as well. People aslo seem to have the tr6's gapped at .35. Is this about right for what I should be running in my car as well? Any input will be appreciated.