Whats wong with the cam

Well, flat tappet is the first drawback. With today's low zinc content oils roller cams are king. They free up hp and allow more aggressive ramping. I am not an expert bye any means btw...but I am a technical guy and would not attempt to steer you wrong. However I would not attempt to spec a cam for you.

Just wondering what would you use instead of the flat tappet cam want to install hyd roller does crane make a direct cross to roller..

tks chuck

575sci

There are lots of proven upgrade combo's for the 575SCi.

I would probably lean towards something close to the 525EFI cam. Its a Crane 168741 ground on a 114 lob sep.
I would call some marine engine builders with experience bumping the hp up on 575SCi.