New question for you all. In researching this 82 CJ7 i read that it should have electronic ignition, and it does not it has regular points and condenser. Did I miss read or has sombody changed this. I want to go back to electronic, and I was woundering if anybody has tried the DUI set up?
Welcome to the JeepForum. You are correct and your Distributor and apprears the igniton was changed. The Stock DuraSpark was mounted on the drivers fender and is a aluminum box6x6" and 2" thick or so. It still might be there. YOu can post a pic on Photobucket and put the link here and we can post and look at it to see if ignition box there. My guess there was a computer PO did not want to deal with and PO changed back to what they understood POINTS and most likely changed out the carb to a non feedback also. PIC of your carb would be good idea also.
If you do NOT have the DuraSpark Ignition Modual there are two price ranges. The cheap 25$ units have issues and do not last made in china, thee better ones will run $80 and are recommended.
AS FOR THE HEI, there are widespread problems with the HEI used in the AMC engines both the 6 & 8. NOt only are there hardened gears, too long shafts, varrying shaft diameters, too much advance, the need to recurve for your AMC engine, spark grounds out to the distributor, and there is more and more to consider. The good news there are HEI that are still good and work well w/o the gear problems. MSD and DUI are both safe and good.
Pacfanweb tells part of the truth and leves out quite bit. THIS HEI STUFF HAS BEEN HASHED OUT MULTIPLE TIMES AND JEEPFORUM ADMIN. HAS CLOSED MANY THREADS BECAUSE OF THE ARGUMENTS. SINCE I JOINED IN DECEMBER LESS THAN YEAR I HAVE READ 40 POSTERS OR SO THAT HAD COMPLETE FALIURE. THE HARDENED GEAR TOOK OUT THE CAM AND PUT ALL THE METAL SHAVINGS IN THE ENGINE. I HAVE ALSO POSTED I WOULD NOT BUY A AMC WITH A HEI UNLESS IT WAS A DUI OR MSD.
I have asked Pacfanweb many times if he is going to post and push the HEI Distributor that he at least post all the truths and other options. I have also said if this continues I will reasearch all the posts of Failed HEI Installs and save them to copy and past to put an end to this. The problem is the next reader of this Thread 6 mo from now, buys the HEI on ebay, installs the new better not hardened gear and the saft is too long and binds the oil pump when clamped down and the engine fails due to failed oil pump fuction.
Here is a good honest write up by JeepHammer on Jeep Ignition
I get 21 mpg with the Stock DuraSpark. I used the TEAMRUSH iginiton upgrade by JeepHammer and Ford. This uses an adapter cap, so the cap can be larger in diameter and taller so the spark gets to the correct cylinder. I requires different wires to the more modern style with male terminal on the cap. It is also recommended that grounds be added to head (s) and a gound be added to the Black wire going into the DuraSpark ignition box. These SIMPLE changes improved mileage 2.5 mpg and 15% performance in pep and rpm range. Unbelivelable and TUNE UP PARTS. This is a comparison on rebuilt 258 with all new parts to start with, wires, plugs, cap, rotar, etc. Performacne on the V8 should even be larger because of the higher rpm range. YOu can buy a 1978 Distributor rebuilt from NAPA or similar for $60 if you have the DuraSpark Modual installed still. This is fully tuneable and is much less than the $450 for the DUI. Just a consideration.
THE BEST SOLUTION nobody has mentioned yet is to buy the 1978 DuraSpark stock distributor and buy a MULTISPARK IGNITON from MSD or SUMMIT RACING.
I purchased the Summit Digital MSD w/rev limiter. This is 5 full spark per fire and is better than the DuraSpark or HEI no ifs or buts. The Summit MSD can be had for as little as $130. The Digital MSD w/ Rev Limiter, $169, can be set to 4500 or 4700 rpm for the I6. VERY good thing to have if on the pedal and drive shaft breaks or something and keeps you from blowing engine. The MSD added 5 mpg to my hwy mileage but I did not notice any pep change. They even have the wire adapter so you can plug it right into the DuraSpark Distributor. With new wires this could be done for under $250.
A good coil to use with the DuraSpark or MSD is the used Ford E Coil. This can be used with 6 or 8. Can be had at the U pull JUnk yard with mtd bracket, connector, and coil for $4 and I even pulled a few extra connectors for same price. I had the orginal 30 year old oil filled coil and was still working but they do get tired.
Here is a good way to mount the used Ford E Coil in the stock location.
The last thing to change with the HEI, DuraSpark w/TeamRush, or the MSD Multi Spark Discharge it to open your spark plug gap to .040 to .045. This will drive the spark voltage up but still controllable. Do not go higher and do not do with the stock ignition with out doing the TeamRush you will get cross fire and arcing.
SPAREs.... I kept the duraspark igniton installed and with the plug in of the two input connectors, plug in the distributor, I have a spare trail ignition with no tools needed. I left the stock harness with not cuts and its all there.
The Cheapest option is the MSD if you do not have the DuraSpark Ignition Modual. It is also the best option and the Jeep Dealer will know how to work on the DuraSpark Distributor and it was made for the AMC engines. Low rpms with lots of torque.
Hope this helps,