Plug readers: What would you do??

RustyRatRod said

According to Brisk, the 14 is not cold. It is to the hot side of center.
https://briskracing.com/pages/heat-range-cross-reference-table

Click to expand...

Interesting. i started out running 12's with this combo years ago, but on advice from a competent nationally known engine builder I switched to 14's on this build. I wonder if I should go back to 12's?