I am taing it out this week end for the first timeI will put it to the test, maybe a video

Thanks,
please let me know how the ecu programing works out.

Is he raising the rev limiter? If not, I don't see you gaining much from the programming. Obviously he will be rolling more timing into it and leaning it out (only way to gain more HP) so what octane gas will you have to run?

Once we tweak a reliable set up I will let you know, remember this is not a back yard mechanic, he is a professional that has the most up to date software. He also talks to Dustin from Whipple

I figured it to be low, just hard as hell to get a "real" rpm reading to go by to tune the props. I have never hit the rev limiter. now if campionchase910 wants to share his brothers tallents after he gets his ECU's tweaked... I'd be glad to send mine up and have the same thing done

Even the kid would like to send his up aswell!

I have read and heard that is not a indication that your boat is running at peak performance and "most" pros say not to use the rev limiter as a tool for "running right on the money" I need to get out and test for RPM ranges and see if I can get set up with some props for better cruise and fuel use. Once the rain stops....

You do not want to be banging off the rev limiter as it is hard on the crankshaft (due to the harmonics).

Never knew why but that makes alot of sense, but alot of "offshore guy's" use this as a "sweet spot" for props

I prop my boat to where if it is just me, no gear, low fuel, perfect temp/humidity, and perfect water conditions, I can hit the limiter. That way under normal load and summer weather conditions I am right at the upper recommended RPM limit for the motor. Take a 496 MAG for instance. Rev limiter is at 4950. Merc lists the RPM limit at 4800. These motors have been dyno'd by numerous shops and make their peak HP at about 4.700 RPM. So, you can spin the motor to 4,950 but you are falling off the peak HP once you spin past 4,700. The motor just runs out of camshaft. More RPM should always equate to more speed but at a certain point if the HP starts to significantly drop off at that higher RPM you may not see any additional speed.