4.0 HO Ignition upgrade - JeepForum.com

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post #1 of 6 Old 08-09-2007, 12:45 PM Thread Starter
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1995 YJ Wrangler 
Join Date: Aug 2007
Location: Salina Kansas
Posts: 24
4.0 HO Ignition upgrade

Hey guys, just a quick question for someone who knows what they're doing, Im looking at upgrading my ignition/coil and I came accross this 1


my question aside from if you think its a good choice is that about half way down the description it links to a coil

(this coil)

My jeep is a 1995 and the coil displayed says is compatable with 1987-1990 YJs, any clue as to why or if thats even true and if so what kind of coil upgrade do you suggest


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post #2 of 6 Old 08-09-2007, 02:57 PM Thread Starter
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Location: Salina Kansas
Posts: 24
no one have any ideas? -bump
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post #3 of 6 Old 08-09-2007, 03:12 PM
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1990 YJ Wrangler 
Join Date: Jun 2007
Location: San Diego
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Seems like a lot of money for just a coil.

I just installed one of these last week and very happy, so far. Idles better and able to rev about 500 rpm higher without changing anything else. I still have stock carter carb (hopefull not much longer)


I have no direct experience with 4.0, since I have 4.2 but that's my 2 cents.
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post #4 of 6 Old 08-09-2007, 03:15 PM Thread Starter
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1995 YJ Wrangler 
Join Date: Aug 2007
Location: Salina Kansas
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thanks for the input, I also thought it seemed like a lot for a coil, but I figured with the new ignition the stock coil may not be able to handle it? Just seeing if anyone thought this coil had anything to offer above other aftermarket coils and if its even compatable for 95YJ
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post #5 of 6 Old 08-09-2007, 04:16 PM
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1993 YJ Wrangler 
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Location: Mesa, AZ
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I would stick to high performance engines on that type of coil. You aren't going to see a lot of a performance hike with the stock 4.0. I thought of that as well, and after some research, realized it wasn't for me.

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post #6 of 6 Old 08-10-2007, 01:16 AM
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1989 YJ Wrangler 
Join Date: Apr 2005
Location: Wilmington, NC
Posts: 5,766
livewires or something like that seems to be the "best" ignition upgrade i've seen first hand on a 4.0

i think quadratec sells their system.... it's just a coil and wires perhaps? i forget..... i wouldn't waste my money on the msd box though....

'89 Wrangler, 4.0/AW4, 106" Wheelbase, SOA, custom XJ packs, 2" Body. Front High Pinion Dana 44 w/yukon super-joints, chromo inners and outers, and a Lincoln Locker. Rear Dana 60 w/Yukon 1.5" 35 Spline chomo shafts and detroit locker. 5.38 Yukon Gears. Hydro-Assist, 39.5x18" Boggers on 15x12 RockKrawler's w/ 2.75" of backspacing. Comp cut, tube fenders, custom bumpers and rock sliders, fuel cell, CB, Stewart Warner Gauges, SmittyBilt XRC8 Winch, 140 Amp CS-144 Alternator, Electric Fan, and a cooler of beer. 3897 lbs

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