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Unread 04-25-2013, 11:59 PM   #1
kovic
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Jeep 4.2 MSD ignition upgrade.

Hey Guys, I know a lot of you have upgraded your ignition. I plan on making my 1983 Jeep Cj5 a daily driver for a little while and am trying to figure out what I can do to make it more reliable.

4.2 liter, roughly 4000 miles, weber carb.

I already did the team rush, well upgrade the cap and roter, my on board computer was removed years ago all together.

Anyways, I read Jeephammer very good details on the updgrades, but I found myself still confused.

I am confused about CDI ignition, and MSD ignition, are they the same thing, or do they have to be done at the same time...

I know this is stupid but I am unsure.

I am also going to replace my coil, probably just the MSD blaster.

Anyways any help would be great, thanks

kov

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Unread 04-26-2013, 05:59 AM   #2
Matt1981CJ7
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MSD is just a particular brand of CDI (Capacitor Discharge Ignition).

Matt
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Unread 04-26-2013, 06:10 AM   #3
steveojeepster
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I did the Team Rush upgrades and installed the MSD 6A box and Blaster coil. Very happy with the performance. Tune your carb right and it'll start first turn every time.
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Unread 04-26-2013, 07:47 AM   #4
WindKnot
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^^^This^^^

I've found the spark to be so hot I can frequently skip using my manual choke and it will still start up right away.
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Unread 04-26-2013, 08:27 AM   #5
HALOjmpr
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I used the Streetfire MSD with a savings of about $60 and it does VERY well also. The difference more than pays for your MSD Blaster 2 upgrade.
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Unread 04-26-2013, 10:45 AM   #6
kovic
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Hey Thanks for the responses Guys, The 6al with the rev limiter is not to important with the inline 6 right.

Thanks for clearing that up

kov
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Unread 04-26-2013, 10:58 AM   #7
WindKnot
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Right. Not needed. The 6A is just fine. As mentioned the Street fire(?) will also work fine, just not as hot of a spark. A little less expensive. I went with the 6A anyways. YOUR choice though, wiring is the same.

Also, DON'T waste your time buying those new fangled spark plugs made from unobtanium. Good old Copper plugs really do work best... and they're cheaper.
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Unread 04-26-2013, 11:21 AM   #8
kovic
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Ok cool thanks. One other thing, As I had mentioned before my onbard computer, i Think that is what it is, it sat above the air condition vent fried a few years ago and shop removed it. Is this going to interfere with he MSD upgrade, is it needed?

Thanks

kov
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Unread 04-26-2013, 12:08 PM   #9
scrapman
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Quote:
Originally Posted by kovic View Post
Ok cool thanks. One other thing, As I had mentioned before my onbard computer, i Think that is what it is, it sat above the air condition vent fried a few years ago and shop removed it. Is this going to interfere with he MSD upgrade, is it needed?

Thanks

kov
Nope, shouldn't matter at all.
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Unread 04-26-2013, 01:42 PM   #10
kovic
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Right on, thanks guys, can always count on you all to help me out as you have done many times in the past

Looks like ill be getting the:
MSD 6a p/n 6200
MSD blaster 2 p/n 8202
I need this to right : MSD adapter p/n 8869 http://www.ebay.com/itm/MSD-Ignition...1ca3fa&vxp=mtr

Does that look about right?

Thanks guys

kov
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Unread 04-26-2013, 03:58 PM   #11
steveojeepster
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Lastly make sure you have good clean spark plugs. Webers can run rich if not tuned properly. Good luck
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Unread 04-26-2013, 04:23 PM   #12
kovic
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Yes, i have had plenty of troubles with my weber, but a lot of guys helped me out last year and I think I got it running pretty good. So the parts I listed, Are those the correct ones?

Thanks

kov
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Unread 04-27-2013, 06:50 AM   #13
HALOjmpr
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Quote:
Originally Posted by kovic
Yes, i have had plenty of troubles with my weber, but a lot of guys helped me out last year and I think I got it running pretty good. So the parts I listed, Are those the correct ones?

Thanks

kov
They look right. The adapter is nice if you plan on going back to the factory setup later, but you can solder, heatshrink and tape and it will work fine too. I am never going back factory so I opted for terminal ends to the coil wires and hard wired the distributor.
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Unread 04-27-2013, 10:03 AM   #14
kovic
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Thanks HALO,

I will probably do the adapter, and it looks like ill need the extension with that. I am not to good working with wires, I am not even sure where everything connects.

I also am going to replace my distributor, mine has a slight wiggle. Should I just get the stock replacement?

kov
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Unread 04-27-2013, 10:46 AM   #15
HALOjmpr
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Quote:
Originally Posted by kovic
Thanks HALO,

I will probably do the adapter, and it looks like ill need the extension with that. I am not to good working with wires, I am not even sure where everything connects.

I also am going to replace my distributor, mine has a slight wiggle. Should I just get the stock replacement?

kov
With the rush upgrade the stock distributor does great. There are plenty who opt for aftermarket distributors instead of CDI. It really is a matter of preference from all I have seen with the 258. The setup you are talking about is with the stock distributor though.
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