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| lean burn replacement https://slantsix.org/forum/viewtopic.php?t=59980 |
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| Author: | Studebake Jim [ Wed Aug 03, 2016 7:13 pm ] |
| Post subject: | lean burn replacement |
1982 D-150, a/t, air, just past 100K miles and then the vacuum transducer lost vacuum....If I could just find a good transducer, I could repair it, but I doubt any around anymore .....I actually have a 1980 vacuum distributor, single pickup, on a shelf here at the house, Holley 1945 carb on my truck. If I just pull the lean burn dizzy and put the vac style dizzy on, any other disconnects/connections I need to make? Not really interested in the GM HEI version except as a last resort. |
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| Author: | DusterIdiot [ Wed Aug 03, 2016 7:43 pm ] |
| Post subject: | You would.... |
The EI distributor needs a 'brain' to fire the coil to get the spark to your spark plug... For EI the tooth on the reluctor and the tooth on the pick up when they line up sends a signal to the EI Module (whether a Mopar EI box 4 or 5 pin connector), or GM HEI...the module then sends a signal down another wire to fire the coil.... (on the typical 4 wire module 1 wire is power to the module- usually keyed hot ignition, 1 goes to the coil, and the other 2 are for the pickup trigger)... The only option that would not require any new modules would be to go with points, which only needs a connection wire to the coil, and the mechanical mechanism inside if adjusted right will take care of triggering the spark). So if you use the EI distributor... you will need: Option #1: junkyard trip to find a pre-1981 non lean burn mopar to scavenger the EI module and wiring harness (assuming both are good). Option #2: buy the HEI module, some wire, and connectors and hook it all up per the various articles noted... Let us know which way you are leaning and we can help you figure out what you need. |
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| Author: | Reed [ Wed Aug 03, 2016 8:15 pm ] |
| Post subject: | |
Beware- you need to verify that your carburetor has a correct vacuum advance port for use with a distributor. Some lean burn carburetors only had a full-vacuum port for the computer and not a ported v=nipple for a distributor. Converting a lean burn ignition to HEI is the absolute easiest swap you can use. Keep your stock coil. Wire the (+) feed for the HEI unit to the (+) coil wire and the (-) HEI feed to the (-) coil wire. DONE! |
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