I was told that I may need a colder spark plug to run with higher boost on 91. Does anyone know if these will work in the CTT?

http://www.ngk.com/product.aspx?zpid=9352

 

I am running about the highest level of boost that these TD04 are good for.. I am on the edges of the compressor map at 16.8 psi. I ran colder plugs, but went back to OEM with no issues. Are you sure you need colder plugs? What boost level are you trying to run?

 

Thanks for your reply. Got a tune, and car chokes/hesitates around 3.5K range. I was told that I should give colder spark plugs a try since I'm at a high altitude with 91 gas. I realize that stock plugs work for many with mods, but I have heard of them to be a culprit in some issues when running higher than normal boost (below). I also had a few shops tell me the same that are in Southwest including Vivid, so I figured I'd ask...

https://www.6speedonline.com/forums/...ng-issues.html

https://www.6speedonline.com/forums/...r-woke-up.html

 

These are the colder plugs I ran.. they worked great for me while they were installed.

Denso IK22

https://www.6speedonline.com/forums/...ml#post3623021

EDIT: If you are having hesitation issues, you may want to shorten the spark plug gap to around 0.6mm to see if it smooths out the power delivery