Re: Performance Parts
Greg - if you want more speed and faster on-plane time, here's an effective way to achieve both:<br /><br />Remove your motor, drive system and all peripheral accessories, cables, guages, etc. necessary to operation of the power package; place all of the mentioned items into a mid-90's or later Stingray hull of ~18' length, and let the good times roll!
<br /><br />Everyone's comments are right on - any meaningful gains in output are going to cost you a bunch of shiny pennies, and require careful consideration of what you want to achieve by boring, honing, porting, shaving and otherwise modifying your motor. A balanced, blueprinted engine is nice to have, done correctly and by the right specialist, but the performance upgrade options for our little marine 4-bangers is obscenely limited. Not that you should give up, just be committed to your goal before you try to wring "10 hp" out of your motor. With the kind of green you'll need to dedicate to the effort, I would quadruple your power gain goal, to 40 or more hp. You'll be looking at the mentioned 2+ mph gain, but the real gain is in hole shot and cruise authority. Someone mentioned the need for a gear ratio reduction but, unless you change the operating RPM range or make a major change in your torque curve, this shouldn't be absolutely necessary.<br /><br />BTW - lilmandavis is right - so far one of my project motors really does go like a raped ape. I'm observing its operational range and characteristics and watching to see how it stands up to standard duty cycles in its modified form.
