W114/280CE aftermarket electronic ignition ?? - Mercedes-Benz Forum

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post #1 of 13 (permalink) Old 01-22-2010, 10:18 PM Thread Starter
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Date registered: Sep 2009
Vehicle: 1972 W114 280CE Coupe
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W114/280CE aftermarket electronic ignition ??

Since starting to work on my W114 280CE ive never had it running so this last week eventually started looking at the ignition system and found that the Ignition amplifier is knackered and the ones ive seen are about $500, ive been looking into electronic ignition conversions and probably decided on getting the Crane XR700-0231.

Is anyone using this type on there car and does it do away with the ignition amplifier ???
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post #2 of 13 (permalink) Old 01-23-2010, 12:30 AM
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Yep, amp goes away. The crane and pertronix are more or less of the same operation - optical pickup and hall effect discharge. I installed a pertronix in my 108 4.5, and the car ran a hell of a lot better afterward. I paid something like $250 for the whole deal.
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post #3 of 13 (permalink) Old 01-23-2010, 08:02 AM
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I used the pertronix with flamethrower coil for about $140. Works great and easy to install. Got it from Summit Racing here in GA
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post #4 of 13 (permalink) Old 01-24-2010, 09:22 AM
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Hey Marcedesbenz, I'm trying to understand an issue I recently had with my 4.5 (currently with my dad). He was checking out the spark plugs and found them severely eroded. When you installed your flamethrower, did you re-gap the plugs to something greater than stock?

Anyone else experience plug erosion with aftermarket electronic ignition systems?
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post #5 of 13 (permalink) Old 01-24-2010, 10:18 AM
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No I didn't do anything different. I am still waiting for someone to chime in if I need a different set of wires. I am currently still using the 5k resistor wires with resistor plugs. I think I need to go to some lower resistance wires now. Can't get an answer on that. I haven't pulled my plugs since the pertronix install, if it ever quits raining I can check, but I haven't heard anyone else mention that. I have heard not to use any platinum plugs, but that is regardless of electronic/ points.
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post #6 of 13 (permalink) Old 01-25-2010, 06:38 AM
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I increased the plug gap to .032" and I probably could go to .035" with no problems. I'm using a Crane unit with an aftermarket coil. Get's rid of the spark amp box and the ballast resistors. ('73 280, '72 250C and a '74 280C). Stock plug wires and NGK plugs.
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post #7 of 13 (permalink) Old 01-27-2010, 03:50 PM
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I've used the Pertronix unit on a bunch of different cars using the original coil. They work great. Used the same plugs & wires. Hadn't thought about plug gap but I'll bet that .035 would be fine if the coil is up to the task.

If it's not broke it dosen't have enough features.
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post #8 of 13 (permalink) Old 01-27-2010, 10:21 PM Thread Starter
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I fitted the new electronic ignition system last night (Crane XR700-0231) taken roughly 2 hours to fully fit it and set it up !! Breifly had the car running by squirting fuel into the inlet manifold so its time to drain off the fuel system and tank with its 10+year old fuel !!
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post #9 of 13 (permalink) Old 01-28-2010, 04:37 AM
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Quote:
Originally Posted by kev 280CE View Post
I fitted the new electronic ignition system last night (Crane XR700-0231) taken roughly 2 hours to fully fit it and set it up !! Breifly had the car running by squirting fuel into the inlet manifold so its time to drain off the fuel system and tank with its 10+year old fuel !!
Looks like you're in for a cood gas tank & carb cleaning.

If it's not broke it dosen't have enough features.
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post #10 of 13 (permalink) Old 01-29-2010, 04:03 PM Thread Starter
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Quote:
Originally Posted by cadurning View Post
Looks like you're in for a cood gas tank & carb cleaning.
Sorted it tonight runs really good and great oil pressure !!! just need to go through the rest of the car and get it ready for the road !!!
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