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C20XE ECU question

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You may have already tried this, but I've found that a good approach to finding a DCOE expert is to connect with your local vintage racing scene.  The shops that focus on vintage race car prep often have a Weber expert in house or one they work with as needed.  



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I’m worried about getting this wired up right so I asked SBD about it and here’s the response I got. Sounds promising.


Dear Sander,


There is no need to worry, the system is the simplest possible to install out of all the systems we do. In theory there are only 3 important wires to fit.


  1. The ring terminal goes to the chassis ground or somewhere earth on the body.
  2. There are 2 x 12 volt feeds on the interface connector. One powers the coil and the other powers the ECU. These can be joined together and taken from the 12V feed that powers the coil on your current installation, or the ECU or to your ignition circuit whichever is the easiest.
  3. The tacho wire which is green connects to the rev counter. There are various places on the car that this can be connected, but maybe the easiest place is on the back of the rev counter itself.


The CAN interface connector is purely there if you use the mapping kit to talk to it. Otherwise it is not used.


Hope this helps.

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On the topic of Weber carbs, I called a guy who referred me to a guy who referred me to a guy who finally said, "Oh yeah I do that". So once I have my new ignition system installed, I have a place to take it to address the carbs. The key, as suggested above, was seeking people who are involved in the vintage racing community. I found the people using webers in the vintage racing community by sending an email to Pegasus Auto Racing. They sell Weber parts so I figured they would know who deals with webers in my area.  

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There are good manuals available online on maintaining and tuning Webers. Pegasus will also sell you sets of jets to try and allow you to return the ones you don't need for a refund. I had a 2000-3000 RPM flat spot in mine and a set of bigger idle jets solved that problem. I didn't do it myself, because I have a shop that knows how to fix Webers a 1/2 hours drive from home.

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