lmac2 wrote:
Thanks 230 Mike. It seems as though you get my drift. Cost notwothstanding I beleive you can see performance gains through well planned engine mods. And I further agree with you that it would take something sgnificant in terms of horsepower to realize the improvement.
In my previous post I was trying (poorly) to point out how manufacturers provided different engine packages with increased horsepower outputs tp provide performance gains. For example, a 5.0 and 5.7 Mercruiser provide different hosepower ratings yet for all intents and purposes the exterior dimensions are the same. It would then, seem to reason that there is definetly a correlation to horsepower and performance, and more than likely several ways to get there.
Being a "motorhead" myself, and my street rod has been modded to over 500 HP, I get where you are going. But, people are trying to tell you that it's more than just a simple power-adder. You are correct that the dimensions of the block are similar or the same for 5.0 to 5.7. That means there is a change in bore and/or stroke. But, look at the power difference. You are gaining 30 to 40 HP, and the cost difference is up to $8k. That is a huge cost for a small gain. And when you look at top speed, the difference is minimal between these motors. The only real gain is in torque, but again, it's minimal for that cost.
My guess is that you bought the Lincoln Continental boat, and expect to add power so it runs like the Camaro. That isn't going to happen for a reasonable investment, either in money, time or lost reliability. As noted elsewhere, trade it for a speedboat, and you'll be much happier.
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2008 Four Winns F224
5.0 Volvo Penta
Towing with Audi Q7 4.2 V8
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