"chipping" the 350

[flippen]

Has anyone reprogrammed their chip to increase low end torque on their engine ? I have done this on my cars for increased perfromance but have not on the boat (Rinker 246, bravo3 SB). I live In Colorado and boat at 5000 ft on the local lake. The delaer orders their boats with a higher gear ratio in the ourdrive to compensate which means more lower end less top end but I am looking for more when pulling a slalom skier out of the hole.
I dont want to change the pitch on the prop because I will loose top end but am willing to sacrifice a few MPG's for more low end

[Capt Ron]

I never heard of chipping a marine engine. They aren't like a car because they operate totally differently. They operate at constant high rpms and their power bands are already far beyond automotive applications. I think you are going to need a lower pitch props in the end unless some else has a way to fix your problem. JMTC.

[Black_Diamond]

I think you will be very disappointed, at best, trying to chip a marine engine.  Depending on the year, the engine module is not a standard GM part so you could fry the whole thing.

Marine engines are made to run at a completely different performance spec than a car engine.  How long do you think your car would last running it at 4,000 rpm all day?  If you want more out of the hole pull, swap props.  You might lose some top end, but who runs at that point anyway? 

[flippen]

Thanks, I did find a person selling a device to interrupt the intake manifold temp to fool it into increase the opening time fo rth einjectors adding more fuel. I don t like this because they are not increasing the timing at all so it seems just a waste of fuel with little efficiency.
I think I'll ask the local dealer to borrow a coup-le of props to check it out. I think mine are stock at 24P and might go down to see waht happens.

[Black_Diamond]

If you have EFI engines, they already compensate for air density with sensors.

Just watch your engine rpm's when changing prop pitch.  I dropped 2" of pitch and completely changed my 342.