Originally Posted by Young Performance (Post 3655339)

ASk away. THere are only a few things that I won't divulge. We are using a Mefi 4B ecm. My software is from GM.

I find it much better to tune the engine on the dyno. We can put it through every possible scenerio and load imaginable. I'll start at 2000 rpm with no load. We will maintain 2000 rpm as the load increases until we are at wot at 2000 rpm. That allows us to sweep all the way through the entire throttle range and check the tune. We will then go up about 200-300 rpm and do it again. We'll do that through the entire rpm range of the engine. That is something you can't do in the boat. Usually the only thing that changes from dyno to boat is idle,in and out of gear and throttle tip in. Those items are easily tweaked in the boat.

When tuning in the boat, you can only tune where the boat can load the engine. You can't sweep like we do. That load can change day to day based on the amount of people, fuel, gear, etc. You could tune it one day under one condition and then it be off on another day under different conditions.

Hope that helps explain it a little.
Eddie

Originally Posted by THEJOKER (Post 3659477)

I know now why I bought new Mercury Verados w/ 5 year warranties!

Originally Posted by THEJOKER (Post 3659477)

I know now why I bought new Mercury Verados w/ 5 year warranties!

Originally Posted by triple 300s (Post 3659631)

Were you considering 1000+ hp 540's in your C/C?

Originally Posted by Young Performance (Post 3659646)

That's like comparing apples to a vacuum cleaner. We are taking about engines that make over 1000 hp. Bet they wouldn't warranty the Verado's for 5 years if they made 700 hp.:lolhit: