It's a road course, so no drag times. I also have a 180 degree t-stat. It definitely helped keep the internal temp lower and almost eliminate heat soak. My runs were very consistent and didn't lose any speed down the straight-aways. There are a lot smarter guys in that thread I posted who have used them at the drag strip and swear they are taking tenths off.

 

Hmm. I may do these before I go w/the Renntech kit (whenever that may be) . . .
I wish Renntech made a set, per previous posts, etc. - Not sure I want to go w/Evosport stuff.

 

are these phenolic spacers useable on the N/A motors or is it strictly S/C engine?