95 E36 M42 in E21 -- DME and EMS considerations

[Jaredmac11]

I've been performing an engine swap in my 78 320i.  Project entailed a complete rebuild of the M42.

I thought the key for selecting an M42 was ensuring it was an M42 with OBD1... but it turns out starting 95, a complicated anti-theft device, EWS, was being implemented.

My car is a 7-95 production which means its EWS2.


I feel like I have 2 options, was hoping someone could verify.
1)  Utilize a tuner chip that couples EWS delete tech:
http://www.midnight-tuning.com/product/e36-318iisti-performance-chip
2) Purchase a 92-94 DME

Number 2 would be waaaay cheaper and I could even have room to find a Dinan chip or something.

I reviewed the Electronic Troubleshooting Manual, and as expected, its the same connector (x6000) and the only difference is the EWS wire going from the ECU.

[Bimmerfan84]

What is the ECU number on the sticker? i.e. 0 261 200 175