Use performance chips or shudder-free chips in your early 944

BOSCH part number  0 261 200 027 used on 84-87 BMW 325e & 528e is the same model (ML1.2) as the Porsche 944. The BMW is a 6 cylinder car so the power board is not compatible. The BMW logic board is identical to the Porsche logic board (socketed version). Only the chip has to be changed. The BMW ECUs are very common and very inexpensive.

From this: No chip socket

To this: With chip socket

Take the BMW -027 cover off the ECU.
Unscrew logic board fasteners (below on right).

Cut the 20 wires between boards: Repeat for Porsche -015 DME

Splice BMW logic board (chip socket) to Porsche power board:

Replace the chip with a stock 944 chip (1982 to 1985.0 version).
Fasten Logic board back in place and replace the cover. Done!

Part List

1. BOSCH part number  0 261 200 027 used on 84-87 BMW 325e & 528e.

2. A foot of 1/8" heat shrink tubing.

3. A new EPROM for the 944. Either a stock chip or performance chip (like mine!). Don't start until you have one.

4. Have all the above parts in your possession before starting work.

This procedure requires no special skills. It is an inexpensive alternative to the adapter board.

Here is an example. An eBay auction ended just a few days ago and it went for $12 plus $8 shipping. Be patient and you too can find a deal.