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5.0 mpi to 5.7 mpi
Hello from Austria,
I would like to convert my 5.0 MPI to 5.7 MPI. Can someone edit the engine control unit for me? I also have the Axius joystick system. Boat was built in 2009. Thank you in advance. |
You cannot convert a 5.0 to a 5.7 but you can replace the 5.0 with a 5.7 or even 6.2
Reprogramming the PCM is not that easy and may not be able to be accomplished, but replacing with a factory one program for a 5.7/6.2 is What is your motor serial number? |
hello, yes of course I mean swapping to a 5.7.
Serial number: 0w962289 The control unit is available new from Mercruiser for 5.7 with closed cooling and Axius. However, it costs around 3000 euros per engine... thanky you!!! |
The SN is coming up a Bravo drive
Yes it will be pricey, new ECM comes in at $2700 USD here Not even able to buy a "new" 5.7, it's either the 4.5 or 6.2 If you get a new long block and ECM you should be able to use everything else off your motor |
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Do you have the engine serial number from the 5.0 MPI?
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Hello:
1A307152 lg |
The SN comes up correct for that year
SN |
I will change the engines and test it with the 5.0 ECM.
i have Riser with AFR Sonde. So i look at Lambda (Afr). lg |
You can not use a 5.0 ecu on a 5.7 without reprogramming.
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Why? Map Sensor regulates this
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Originally Posted by Bavaria1994
(Post 4906928)
Why? Map Sensor regulates this
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^^^Agree
The MAP tells the ECM how much air pressure/vacuum is inside the intake. The ECM uses that to increase/decrease the amount of fuel the injectors are on/off. The issue is this is based on the programed fuel tables. The ECM doesn't know that the volume if air being sucked in by the piston has increased, so it will only supply fuel based on the smaller displacement. In short the 5.7 will run lean and it will be destroyed unless the knock sensor tells the ECM to retard timing |
yes I understand, in the best case it could work. 5 rings say it's working. 5 say it doesn't work. In the worst case, the lambda display will tell me everything. and running at a standstill won't cause the engine to break down so quickly. or what do you think? lg
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Originally Posted by AllDodge
(Post 4906938)
^^^Agree
The MAP tells the ECM how much air pressure/vacuum is inside the intake. The ECM uses that to increase/decrease the amount of fuel the injectors are on/off. The issue is this is based on the programed fuel tables. The ECM doesn't know that the volume if air being sucked in by the piston has increased, so it will only supply fuel based on the smaller displacement. In short the 5.7 will run lean and it will be destroyed unless the knock sensor tells the ECM to retard timing |
Originally Posted by Trash
(Post 4906973)
I think we need to throttle back on the "destroyed" engine bravado. That doesn't paint a complete nor accurate picture. What you are saying regarding the fuel table operation is true, and the engine will 'likely' run leaner, but how much leaner is TBD. I bet it would start and idle fine with a good AFR. If its too lean to start you aren't going to ruin the engine. It simply won't start. IF I was the OP, you could start and idle the 350 on the stock 5.0 tune and with AFR see where it sits in the idle no load regime. It would also be extremely important to see what flow rate injectors are currently in use. From that point on, assuming you could use MEFIBurn etc, you could adjust the BPW as necessary for the wider operating envelope under different load conditions.
Which cannot be tuned with MEFIBurn it's a PCB 555 (item 3) PCM 555 |
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