Thanks for the info everyone.

I don't think you can access the maps with a computer on the 2D model I have. I maybe wrong, I'm gonna tow the boat to the house tomorrow and check it out more indepth. I'm gonna call Holley and see how much they will charge me to swap out the ecu.

Well I talked to Holley about the prob. They said I have to have atleast 15psi constant fuel pressure. Right now I have the pump at the end of a 6 foot run from the gas tank. This weekend I'm going to pull up the floor and move the pump to the beginning of the line. He said the pump is made to push fuel not pull it so that could be a big part of the prob.

Its gonna be lots of fun pulling up the carpet and fliberglassed floor. lol

Oh and I was told that the Car unit and the boat unit, both have the same fuel maps so swaping out the ecu would do nothing.

Nemesis,

I tried this with Accel fuel injection units from Lingenfelter Performance Engineering on modified 454 Magnums a few years back. Very idealistic ... latest technology, linear torque, better efficiency, cleaner emissions, blah, blah, blah. After two years of nothing but problems, I took them off and bolted on some good carbs. It is just not worth the $$$ and frustration trying to make this work in a marine environment.