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I'm eventually updating my 142 to stroked b23E (crank, rods,pistons are done). As it will be 2655cc and high comp, and figured I'd better get smart about d-jet if I were hoping to get it to make the transition from b20F.
Since you can set up steps and so on in d-jet fuel maps for under $125, and make it globally adjustable from the drivers seat for less than $10 I think you're wasting your money... but some thoughts that may be useful:
1/ d-jet duty cycle is maxed@ 50%, not 100, because of batch firing. This means the injector are *huge* from the factory and fire at very short durations. You can power 85hp easily from each d-jet injector, if it were run at 100%
2/ d-jet uses 3 volts not 5 or 12 as later systems. Presumably this means big amperage draw... and that any driver circuit in the main brain box has to suit the volt amp needs of these odd injectors.
3/ If you go to a modern brain you can and should use newer, more conventional injectors on longer duty cycles. I'd look to GM TPI's which are getting a bit rare in junkyards, or Ford 302's from 88-93 or so. You can pull 8 and match them if you wish.
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