I am considering the 117" m8 kit with the RS 468 cam as configured Zippers. Zippers sleeper kit offers stock [just under actually] compression while MF suggested to me a 10.8 compression, both with 5.5 injectors and stock heads and TB. What compression is better for that cam? Also - is it need to send a seasoned set of heads into either Zippers or MF for boreing, or is a virgin set of cylinders OK? I already have better air in and out with Kn and Vance Hines pro pipe.

 

Just do your research and someone here might have the juice for you.I know the RS 486 has been at 11to1 with great results with a big bore kit.

Peace