"[i]needmorepower : actually i
"needmorepower : actually i am not using this engine for a marine application
not reading, and not thinking outside the box. yea, there's no replacement for displacement. getting 1hp to 1.5hp per CI is possible.
I'd pour money into an inline 6 before a V8 cuz these days its not as common to do, cuz it's not that smart, but look at the 4 & 6 bangers in the new Fast & Furious type cars, they can't easily stuff a GM or ford V8 in there, yet they are able to get 400+ hp from 4cyls !! I saw somewhere many years ago that someone got 350+ hp from a 4cyl. It depends on what he's using it for, just because he's here on a boat forum you assume its a boat. or he has a 4cyl, he should have room for an 8, I know there are 10' boats with 400hp V8's."