Spark plugs for smaller pulley whipple

[Anthony k]

looking to swap plugs, I see a lot are using ngk-6510 for “stock” boost levels.
What about smaller pulleys?

Stock is 6509
One step colder is 6510

Go 6511?

Whipple with 3.37 pulley

 

[1BAD454SS]

Denso ITV-22 set at .28 gap what i have mine at . I'm running 3.125 pulley. Scratch that you have a 5.4

 

[Anthony k]

Denso ITV-22 set at .28 gap what i have mine at . I'm running 3.125 pulley. Scratch that you have a 5.4

No sir. 2011 6.2

 

[1BAD454SS]

OK i saw later you posted in 5.4 which is totally different spark plug. ITV22 are a step colder then recommended. ITV20 for a stock engine , ITV22 for whipple recommended boost. ITV24 would be 2 steps colder. 22's have worked for me and i run same plug in my 14 ecoboost at 20psi boost.