I'm running the one heat range colder than stock IT22's with the stock pullies (for a little bit of a safety margin given our 91 octane) and it idles better than it did with the stock heat range plugs.

EDIT: sorry for the really old thread bump!

 

Holy thread resurrection Batman. I thought Tommy was back in business!

 

I've been running IT-20'S for along time but, nowhere near your boost 11-13 lbs. here also w/4lb lower stock upper runs like a champ !

 

Hey, I have not been on in quite some time. Funny to see a post from me at the top when I logged in.

Have learned lots more about plugs and such since this post....lol Also have a cage and completly different setup now.

Well I do have a built motor with 9:1 compression, IT24 plugs and running a 6# lower and 2.75" upper pulley on the stock Eaton. Have it setup with a street tune running regular fuel and seeing about 12#s of boost (have compcams stage III cams that are advanced).

I am NOT selling any services or anything related to automotive. I am however here to get back to having this as a hobby. That said, I do have the programming software and have tried many different setups and have many more ideas I want to try. So if you have any questions let me know.