Roush Spark plug gap???

[HazeGray]

Just a quick question...I recently replaced the stock plugs in my 2004 supercharged S281 with a set of NGK TR6's. I gapped them at 0.035". However, I looked at the sticker on the hood and it says to gap the plugs at 0.052" to 0.056".

What should I be going with?

 

[ag lightning]

How much boost are you putting out?

 

[HazeGray]

How much boost are you putting out?

12 lbs

 

[ag lightning]

.037

 

[HazeGray]

.037

Thanks, I'll just leave it where it is gapped. BTW - how did you come up with the gap setting? Is there a formula based on boost and hp level over stock, or something?

Appreciate the help...

 

[ag lightning]

Thanks, I'll just leave it where it is gapped. BTW - how did you come up with the gap setting? Is there a formula based on boost and hp level over stock, or something?

Appreciate the help...

Lots of time with boosted vehicles.. Trial and error was all it took