HEAD guru's step in please
HEAD guru's step in please Here is what i have 408ls 10.9 to 1 mast ls2 cathedral heads 215. Cam is 617/624 dur 231 239. Hydraulic.also running a pt88 turbo. I am wanting to c if there is a better cathedral port head out there for my set up and would there be enought to gain with a head change 25 hp or more would be worth it. Car will be shifted 6800 rpm. Street driven on e85.I like the mast cathedral 245 port heads but i cant find any flow numbers?Also intake os a pro flo.Was think about the head swap and maybe a 70cc head or better will bring dowm the 10.9 to i think around 10.1 area so i could add mor boost. The car isnt running yet so the head swap wouldnt be bad. What are thoughts if u could explain ur awnser also.Thanks
