Mefi-4b Ecu why so hard to find?
01-23-2011, 08:26 PM
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MEFI-4B is a very desirable ECM. It is user friendly with the MSD programs and is easy to install O2 sensors. 4B offers nice boost fuel corrections, timing adjusements and other variables to allow the ease of EFI on a blower motor. I have one each on my 1000 SCI's and they work like a charm.
01-24-2011, 08:03 AM
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bank fired and it doesn't matter how big the motor is.
Crate Engine depot has the best deal around. I bought one last year complete with harness for just over $600.
Crate Engine depot has the best deal around. I bought one last year complete with harness for just over $600.
01-24-2011, 03:14 PM
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MEFI-4B is a very desirable ECM. It is user friendly with the MSD programs and is easy to install O2 sensors. 4B offers nice boost fuel corrections, timing adjusements and other variables to allow the ease of EFI on a blower motor. I have one each on my 1000 SCI's and they work like a charm.
01-27-2011, 09:20 PM
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4 4a and 4b
differences are mainly memory cpacity and OS version change. All support narrow band O2. All support Coil on Plug, and Wasted Spark ignition, as well as, Various Distributor types. The 4 variants have greater granularity with in the tune parameters...
Only the MEFI 5 will support sequential
Have source for 4b if needed. Crate engine depot excellent source and great value.
differences are mainly memory cpacity and OS version change. All support narrow band O2. All support Coil on Plug, and Wasted Spark ignition, as well as, Various Distributor types. The 4 variants have greater granularity with in the tune parameters...
Only the MEFI 5 will support sequential
Have source for 4b if needed. Crate engine depot excellent source and great value.
Last edited by tunertech; 01-27-2011 at 09:22 PM.
