90 YJ ??? What if??? - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > 90 YJ ??? What if???

TJ, YJ & LJ Drop Down Tail Gate Conversion KitGreat prices on seating!--Oconee Off-RoadTJ 5.25" Speaker Adapters - NalinMFG

Reply
Unread 06-20-2013, 05:04 AM   #1
Grudge-F
Registered User
 
Join Date: Jun 2013
Location: Mount Wolf, PA
Posts: 16
90 YJ ??? What if???

New member, second attempt at first post.
I and most of my coworkers are vets. This being said we tend to have different discussios than most. So... we got on the topic of an EMP proof Jeep. Most of us are current or former Jeep owners and all have experience with molding them. So to the part where I ask the question.


What is the most basic whire set up we can do on a YJ 258? I Dont want anything the motor doesn't need to run. This will be with; motor craft carb, manual trans, manual choke, and manual 4x4 cable. Thanks in advance for all the responces both helpful and otherwise!

Grudge-F is offline   Reply With Quote
Unread 06-20-2013, 05:12 AM   #2
jimbos76cj
Registered User
1989 YJ Wrangler 
 
Join Date: Jun 2007
Location: Florida
Posts: 427
To just make it run use a HEI distributor. You would need power for the dizzy and power for the starting circuit. Obviously you would need a basic charging system also. Actually if its a manual trans you don't need a start circuit.. Just a strong back to push it.

If you wanted to get super safe, no electronics you can go 4bt cummins with a manual fuel pump cable. Push start, and drive. No electronics needed, just make sure you park at the top of a big hill every time you park it.
__________________
88 YJ 35's 8.8 rear, family style roll bar, ax-15 external slave conversion, Custom double D fab dash 4" of lift taurus fan, Head light wiring upgrade, MSD 6al, JB conversions SYE, 258 with RV cam, Long tube headers, Borla exhaust. 1"mm, Auto meter gauges.
jimbos76cj is offline   Reply With Quote
Unread 06-20-2013, 05:46 AM   #3
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 14,550
Grudge if it has wiring and a computer the best you can hope for is to make it emc resistant, emp proof is not going to happen unless you run it with rubber bands. I work in an Electromagnetics test lab and I can tell you that anything that has electronics I can operate or cause to fail with the right frequecy and power level. If you are looking to make it resistant there we case studies done in the 50's and 60's with cars and consumer goods exposed to the emi from a nuclear blast. They were drivable after the emp pulse but were knocked out from the broadband pulse generated.

The nutter bypass gets rid of the computer, go to a old style point distributor and coil like the CJ and put ferrites on the power wires to the alternator and the coil. A shield can be made for the distributor and coil; we had them on the egyptian military jeep. Also twist all the power and ground leads. Run a ground strap for the hood and another to the exhaust.

That should do it!
Que89YJ is offline   Reply With Quote
Unread 06-20-2013, 05:46 AM   #4
Grudge-F
Registered User
 
Join Date: Jun 2013
Location: Mount Wolf, PA
Posts: 16
Can you get away with just the manual fuel pump on the 258? That's all my 74 CJ5-304 had. And it definitely used more fuel!
Grudge-F is offline   Reply With Quote
Unread 06-20-2013, 05:52 AM   #5
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 14,550
Yes, mechanical pump is what they came with.
Que89YJ is offline   Reply With Quote
Unread 06-20-2013, 05:57 AM   #6
Grudge-F
Registered User
 
Join Date: Jun 2013
Location: Mount Wolf, PA
Posts: 16
Que89YJ, Thanks for the good input! What would I need to make the shield??? Also thinking of making it gas / gasification capable.
Grudge-F is offline   Reply With Quote
Unread 06-20-2013, 06:04 AM   #7
Jonathanjr1
Registered User
2003 TJ Wrangler 
 
Join Date: Sep 2012
Location: albuquerque, New Mexico
Posts: 231
What about a steam engine and oil lamps for head lights. Or even have it pulled by a horse.
Jonathanjr1 is offline   Reply With Quote
Unread 06-20-2013, 06:14 AM   #8
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 14,550
There are 2 types of material for shield that you worry about permeability and permittivity. Permiability is the electrical field and it is easy to deal with. Shielding on a coax is a good example of shielding for it. Steel will work. Permittivity is magnetic and it is very very difficult to shield. There are subtances called Mu-metals that you use to shield for them. Exotic and expensive. They are generally not very malable without compromising the effectivness of the characteristics. The do come in a foil sort of like aluminum foil. You would make a steel cover for coil, and distributor making sure they have a good contact to ground then cover them with the mu-metal.
Que89YJ is offline   Reply With Quote
Unread 06-20-2013, 06:31 AM   #9
Grudge-F
Registered User
 
Join Date: Jun 2013
Location: Mount Wolf, PA
Posts: 16
OK. So where can I get mu-metal? This is a project for the fun of it only so we are not looking to go way overboard on expenditures.

Also the fuel pump; I was thinking my old 89 had both a mechanical and electric pump, but that was a total different project from days past. It wasn't even a jeep system I was thinking of!
Grudge-F is offline   Reply With Quote
Unread 06-20-2013, 06:52 AM   #10
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 14,550
The 4bt diesel mentioned doesn't need the electronics. The mu can be found on line. Just Google it.
Que89YJ is offline   Reply With Quote
Unread 06-20-2013, 07:03 AM   #11
superj
Registered User
1987 YJ Wrangler 
 
Join Date: Mar 2008
Location: corpus christi, texas
Posts: 6,329
the fuel pump is on the side of the block. passenger side.
__________________
Slow ride, take it easy
superj is online now   Reply With Quote
Unread 06-20-2013, 07:49 AM   #12
Grudge-F
Registered User
 
Join Date: Jun 2013
Location: Mount Wolf, PA
Posts: 16
Yea. Fuel pump was my past projects getting in the way of new ones! Way to many things going on up there!!!

The MU-metal is on eBay! Looks like about $150 for enough to do the job!

I have wanted to go 4bt for years but don't have the cash!!!

No comments on the gasification???
Grudge-F is offline   Reply With Quote
Unread 06-21-2013, 01:15 PM   #13
Grudge-F
Registered User
 
Join Date: Jun 2013
Location: Mount Wolf, PA
Posts: 16
Ok... so I just sent out an offer on a 94 YJ with a 4.0. Obviously the 4.0 has to go! I also sourced a 91 4bt. Will be scrapping a bread truck soon! So the frame off restoration will start in a week or two. Offer being excepted of course. Will need all the 4bt help I can get.
Grudge-F is offline   Reply With Quote
Unread 06-21-2013, 01:38 PM   #14
jimbos76cj
Registered User
1989 YJ Wrangler 
 
Join Date: Jun 2007
Location: Florida
Posts: 427
I thought this was a hypothetical discussion? The 4bt is a pretty comin swap now a days.. I have a buddy who did one on his yj and actually made $15 by parting out and scrapping the rest of a bread truck. Made decent coin from recying the aluminum side panels.. Make sure you pull it off and scrap it seperately so you get paid the higher price..
__________________
88 YJ 35's 8.8 rear, family style roll bar, ax-15 external slave conversion, Custom double D fab dash 4" of lift taurus fan, Head light wiring upgrade, MSD 6al, JB conversions SYE, 258 with RV cam, Long tube headers, Borla exhaust. 1"mm, Auto meter gauges.
jimbos76cj is offline   Reply With Quote
Unread 06-21-2013, 02:15 PM   #15
Dake
Senior Member
 
Dake's Avatar
1991 YJ Wrangler 
 
Join Date: Oct 2012
Location: , GA
Posts: 977
Just store extra parts in a faraday box. And put them on after the blast.
__________________
Waiting on my Rough Country lift to sag!
Dake is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.