Getting rid of learn burn.
I have a 1984 slant 6 D150. I want to replace the lean burn system. I believe I just need to replace the carb and put a standard electronic distributior on it. The carb is shot anyway. So should I replace the carb from like a 1974 D150. And could anyone recommend a slant 6 electronic ignition kit. I found a kit on EBay but it said you could not use it to replace a lean burn system. Not sure why I couldn't use it if I was replacing the whole electronic ignition.
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Nice D150!
Swapping out the Lean Burn will be a plus, better drivability and mileage.
And you don’t need a bunch of high priced parts like that Davis ignition to do it.
1) remove the Lean Burn ecu, it’s either mounted to the air filter housing or up in the driver side front fender. Find the wire that sends power to the LB when the ignition is switched to start and run.
Use that wire to power the coil and trigger a relay that powers a GM 4 pin hei unit
2) does the existing carb have wires that go to the float bowl? If so you will need a non lean burn carb. If not your existing carb will be fine. Assuming it is is a good functioning carburetor.
3) the locked lean burn distributor will need to be replaced with a Mopar electronic distributor with a mechanical and vacuum advance. One that is pre lean burn. Some of those are better than others for the existing ignition curve, but any of them can be recurved, not hard to do. The existing locked lean burn distributor is useful to someone running EFI. I use one with my MS3 Pro.
3) lots of posts on wiring in a hei module here at FABO . Slantsix.org also has posts specific to a slant six conversion. I like to power mine through a relay, easy to do. Go ahead and buy a real Delhi / Delco hei module, some of the knock off ones just don’t last. The hei will need a good ground and a heat sink, all of that is covered in the posts.
4) upgrade the coil to one that is designed for an HEI.
Do a little research then
gather up: electronic Mopar distributor,
Carb if needed,coil, hel module and heat sink, a relay and the appropriate wires and connectors, then do install.
You will like it.
