Ok, I am seriously-Newbie at boats. But, I have been building hi-perf cars for over 20 years. Don't laugh too hard if what I propose is so ridiculously stupid, just slap me and set me straight!
So, I bought a 19' bow-rider ski boat project (floor, stringers, engine mounts, transom, I think this thing was "sunk" in someones driveway for 10 years!) I am in the process of redoing it all myself.
The engine and drive are perect! Not even a leaky valve cover, very very little hours. It's a 305/Alpha One combo, 205hp 2bbl. Not really a "Performance Boat"... yet! That's why I'm here!
So while its all out, me being a speed guy, I want to block off the exhaust and run thru the transom. To save the stern drive all that heat, and free up some horsepower. I was thinking of building my own exhaust (because I can) but, and here's the big Q, is it possible to run the exhaust without water? I also have a single draw-thru turbo setup from the old Pontiac Turbo Trans Am I was thinking of running on it. It is not a boat turbo, no water jackets. So am I going to burn the boat down and sink it? Or is there an alternative to water cooled exhaust (I was thinking of wraping everything double with header wrap).
Can it be done? I have a pair of Rams Horn manifolds I was going to wrap them in header wrap, turn them upside down and build my own up-pipes, Y- the two into the turbine housing and run a single downpipe with a 6" riser and out thru the transom. The turbo should be good for 350hp on 10psi.
Next Q, can I run a closed cooling system and ditch all the hoses and other crap, just run a single radiator/electric fans or lake water heat exchanger? Again, be easy on me, I am a car guy, I have my car ideas, maybe they will work or maybe not. What say you all?
Thanks for your time guys.