I'm considering Siemens 83's or Delphi / MSD 96's .I'm looking for people who have preferrably tried both. Either one will be large enough for my needs, but I'm more concerned about behavior at the lower end. Spray pattern, idle tuneability, etc.

I'll be using a Gen 3 ECM with a Versafueler or AEM injector amplifier. I believe minimum commanded pulse is 1ms with this ECM. Fuel pressure will be vacuum / boost referenced.

 

They tune fairly similar when using the Versafueler use the size you need for your application.

Nate