Mefi conversion
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Mefi conversion
I've read just about everything on converting from differing Mefi units. I'm having issues with my engine and I'm almost to the point of converting. I have a Mefi 1 but have a spare 4b ecu laying around.
I'm not new to repinning wiring harnesses but I have found very little in detail of the conversion. I have both ecu pinout diagrams and they appear really similar. The biggest thing I know to be different is the Mefi 4 has a crank angle sensor vs the sensor in the distributor like the Mefi 1. But I believe the Mefi 4 also sends a signal from the distributor. Who should I call or contact for a 5 minute phone call to solve my questions?
I'm not new to repinning wiring harnesses but I have found very little in detail of the conversion. I have both ecu pinout diagrams and they appear really similar. The biggest thing I know to be different is the Mefi 4 has a crank angle sensor vs the sensor in the distributor like the Mefi 1. But I believe the Mefi 4 also sends a signal from the distributor. Who should I call or contact for a 5 minute phone call to solve my questions?
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its all in how the ecu's program is configured.I've used the 4b on the 496's w/ crank and cam and also on my hei engines were it only has a 6 pin distributor.I could,if I wanted to set it up for dis set up and I believe it will work w/ 24,58 tooth crank trigger set ups.
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I've been searching OSO for quite awhile now. Is there any advantages to a LT4 hot cam on a mefi 1 system? I've found a ton of info on cars/trucks and boats with carbs. Virtually nothing speakable on boat EFI.
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Much appreciated. I've been milling around the jet boat forums and it seems that my engine is right on par with others. I believe my friends low hour 350 was a factory freak or his tach was off. It's fairly hard to find a 2.9 impeller used. That's my next step.
Don't forget my fuel burn is something fierce. So I'm still sorting through that issue.
Don't forget my fuel burn is something fierce. So I'm still sorting through that issue.