I tried to buy a tune for my old F24. They would not sell me one. I even went the route of telling them I fried my ECM during a bad jump start. They wanted my engine SN and said I would have to send in my ECM before getting a new one out side of warranty. I called every marine engine builder/tuner on google. No one has tuning software for the E-Controls ECM that Indmar uses. Had it been any one of the MEFI versions it would be easy. I was very close to slapping on a blower and cam and rewiring my engine harness to work with a GM ECM with OBD II, making my boat think it was a camaro. Then we ran across our RZX and went that way instead.
From a semi disgruntled Moomba salesman (so take this however you want: ie hearsay) Indmar does the different tune HP/TQ numbers soley to benefit the dealers. It doesn't cost Indmar any more money to make the 360, 400, 440 or the bigger ones up to, but not including the blower. A few different parts, but really the same over all. Nothing added or removed. Any real cost difference is negligible and it gets absorbed. This gives the dealer all the profit they want to make on the sale of an engine upgrade. This makes sense to me though when I compare the cost of a 440 upgrade from the different manufactures. The difference is often not hundreds, but thousands.
From a semi disgruntled Moomba salesman (so take this however you want: ie hearsay) Indmar does the different tune HP/TQ numbers soley to benefit the dealers. It doesn't cost Indmar any more money to make the 360, 400, 440 or the bigger ones up to, but not including the blower. A few different parts, but really the same over all. Nothing added or removed. Any real cost difference is negligible and it gets absorbed. This gives the dealer all the profit they want to make on the sale of an engine upgrade. This makes sense to me though when I compare the cost of a 440 upgrade from the different manufactures. The difference is often not hundreds, but thousands.
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