Re: Supercharged 3.0 Litre Mercruiser
Chargerboy said:
I was asking for help, not jokes.
Do you have a specific question? If you do, and can state it clearly (or at least well enough for people to understand) there's lots of knowledgeable people on this board who will be more than glad to help you.
From your original post:
What are everybody's thoughts on this? I've never heard of it being done before to a 3.0 Litre. Can this engine handle any amounts of boost? Is there any used chargers I should be looking for in particular off any production vehicles? Or am I just completely retarded for even thinking this is a good idea.
Let's look at what you're doing. You have a 3.0L making about 120HP in a 1989 16' boat that speed-wise is probably somewhere in the high 30's, maybe low 40's MPH. It takes about 10HP to gain 1 MPH in speed on a boat. A typical V6 makes a little less than 200HP and would EASILY run in the mid to high 40's in the same hull. Say you add 50% more power to your 3.0L (don't forget that if you pump 50% more volume into the engine, you also have to get it out. You may want to take a closer look at your 3.0L exhaust manifold, they're not exactly famous as the most free-flowing exhaust systems around .....). Anyway, now you have 180HP and a boat that will maybe do mid-40's if you're lucky. If you think this is a good idea, and it's something you want to do, go for it. It's not very hard, just buy some hardware and bolt it on. Just don't be surprised when most people aren't real impressed by it.
If you're going to race the boat in a class that requires you to run that specific 3.0L engine block, or has a max displacement rule of 3.0L, then supercharging would be the way to go.
Your original engine in something like a Stingray hull will do almost 60 MPH. Yamaha makes a boat with TWIN supercharged 1.8L motors that produce 180HP EACH (Yamaha 242 Limited S). It even has 15 stainless steel cupholders, they know what's really important on a boat! Mercury makes a whole line of supercharged outboards (Verado's). This thread has a picture of a boat with a turbocharged 3.0L from a kit that went out of production about 20 years ago, because not enogh people wanted it:
http://forums.iboats.com/showthread.php?t=359401&highlight=turbocharged
What you're talking about doing is no where near "out of the box", it's just a little different, more complicated, and more difficult way to add a little more power. People have been doing it since the 1920's, about 90 years.
Maybe if you are more specific in what you're trying to achieve people could be of more help. But if you just want to bolt a supercharger on a 3.0L because you think it looks cool, I think you'll find that most people who know anything about boat performance will be less than impressed.
