I was wondering as far as head work is concerned what would you possible have to have done to a head(as far as valves,springs,retainers,cams) if your run high compression (13.1 compression )pistons....for example ls built bottom end(knife edged crank,rods,pistons) and a b16 head?? Any help is appreciated

 

... anybody??

 

You don't have to do anything to your head to run 13:1, but it will help you take advantage of the extra compression