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Thread: 225 HPDI rebuild
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06-11-2022, 08:42 AM #136Screaming And Flying!
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There were 16 bit and 32 bit ECM's on these motors so also be sure to know which you have.
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06-11-2022, 11:01 AM #1375000 RPM
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06-11-2022, 11:12 AM #1385000 RPM
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Forbesauto...you mention HT, just call them...sure as heck they are not the only ones that have the answers.
If this was a merc, we would have a 100 answers!!
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06-11-2022, 11:21 AM #1395000 RPM
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It would just be nice for someone to comment "this is what you do" because they have the kit, etc...
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06-11-2022, 02:22 PM #140Member
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Hopefully by the end of the summer I can have some answers. Took a while but myself and a friend have figured out all the channels jn the ECU and will be doing some data logging and tuning later this summer. Work has both of us too busy unfortunately.
Also hoping to delete the 4 cylinder idle and the neutral start switch setup. Would be nice to be able to start it in gear when j want to.
There mapping difference between the different ECU's when you compare them. But haven't dove into what the actual differences are yet.
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06-14-2022, 02:36 PM #1415000 RPM
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06-14-2022, 07:32 PM #142
Do you know what the timing specs are now on the 2.6? I haven’t done one yet to know. If the numbers and blowdown are similar it will tell us a lot about the design of the motor and if it will work.I think they are similar, but not 100% sure to say yay or nay. If ya can get the numbers off the 2.6, we can go from there.
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06-15-2022, 03:55 PM #1435000 RPM
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It's still a good running motor, but low on compression across the board, 102 - 110. I'll be tearing it down this winter. Want to get a little more out of it.
1986 Baker 18 Mod VP, Yamaha 175
2001 Crest Pontoon, 150 Opti
1968 Sears 14' aluminum, Merc 110
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06-18-2022, 04:31 AM #144Member
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I'd be interested to see what's going on inside the 2.6 as well re: port layout.
I worked a 85' v4. Very similar exhaust port specs but had more blow down than my 225 HPDI and less transfer area.
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