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#1
08-22-2014, 02:46 PM
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w108 280s Crane or Pertronix?
So I am thinking of diving into this conversion but I am torn with what to go with
I have heard good things on both products and may be leaning to a Crane XR700 part number 700-0231. What else would be needed along with this...? A new coil too? http://www.summitracing.com/parts/crn-700-0231 I have no expierence with converting point to electric but I do understand the benefits. 1969 280s gas with dual carbs
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1969 w108 280s 
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#2
08-22-2014, 07:28 PM
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Crane or Pertronix
Like you I have no experience with either....I believe both systems and very good.....some say that Pertronix is easy to install and is more reliable....
Pull up the instructions PDF for the crane.... Cannot find detailed instructions for Pertronix.....much discussion by our members on this forum.....
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#3
08-22-2014, 07:53 PM
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If you're willing to wait another two weeks, I have a Pertronix + MSD 45kV coil ordered. I'll throw it in as soon as it arrives and let you know exactly what I did and what the results were.
FWIW, it was a huge improvement in cold start quality on my old W114.
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#4
08-22-2014, 09:28 PM
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Quote:
In the meantime folks please feel free to chime in
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1969 w108 280s
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#5
08-23-2014, 01:45 AM
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Pertronix
I have a Perortronix and mine and it works great! I was using the wrong coil first (for a 4 cyl), but with the correct coil it is super.
I've heard 2-3 cases of the Cranes failing, so I'd stay away. It's way more complicated too. It does not get much simpler than the Pertronix.
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Csaba 1972 280SEL 4.5, silver
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#6
08-23-2014, 09:44 AM
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Pertronix is what I used, installed , never looked back...
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Ron 2015 Porsche Cayman - Elizabeth 2011 Porsche Cayman - Bond,James Bond Sadly MERCEDESLESS - ALways LOOKING ! 99 E320 THE Queen Mary - SOLD 62 220b - Dolly - Finally my Finny! Sadly SOLD 72 450SL, Pearl-SOLD  16 F350 6.7 Diesel -THOR 19 BMW X5 - Heaven on Wheels 14 38HP John Deere 3038E Tractor -Mean Green 84 300SD, Benjamin -SOLD 71 220 - W115-Libby ( my first love) -SOLD 73 280 - W114 "Organspende" Rest in Peace 81 380 SL - Rest in Peace
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#7
08-23-2014, 10:44 AM
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Quote:
If you've got $450 or so to throw at the problem, the replacement 123-brand replacement distributors look like a great solution. I think user Palolo is running one in his 108.
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#8
08-23-2014, 07:29 PM
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Both are good upgrades. I've used both. I lean towards the Pertronix more since there are no external components. The Crane uses an external control box. Nothing wrong with it, it's just an additional bit of wiring. I ran the Crane for 3 years and until I blew it up, it worked flawlessly.
 I fried the opto-receptor in an attempt to direct drive the coil. Oops!
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“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.” ― Brian P. Cleary, You Oughta Know By Now
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#9
08-23-2014, 11:35 PM
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Quote:
For some reason I heard this issue was fixed with the ignitor 2...or would that be the same all around?
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1969 w108 280s
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#11
08-24-2014, 12:14 AM
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May I suggest a better solution. The 123 Ignition.
123ignition electronic ignition systems for classic cars
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Britton McIntyre 68 280 SE coupe 'Hairball' 70 280 SL 71 280 SEL - RIP May 2010
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#12
08-24-2014, 01:25 PM
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Quote:
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#13
08-26-2014, 01:04 PM
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So I decided on the Pertronix which should be delivered shortly.
Now I have another question on the install... I have the instructions and am now confused So if I am running a stock Bosch coil do I bypass the resistor or keep it in line? Instructions say it can go either way...
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1969 w108 280s
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#14
08-26-2014, 01:14 PM
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Also with the distro...
I asume the pertronix unit wires go out the direction of the yellow arrow. Whats going on with this ground circled in red? Do I bypass that as well? 
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1969 w108 280s
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#15
08-26-2014, 01:31 PM
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There several reasons why the 123 is superior.
First the other systems of electronic ignition (Crane or Pertronix) require that the original mechanical centrifugal advance system be still fitted which suffers uneven wear and consequent lumpy running of the engine because each cylinder has its own inaccurate ignition timing. Furthermore they all require a separate box for the associated electronics. The 123 ignition is different, all is contained in one simple module which just goes in place of the original points box, the points operating cam is removed along with the advance weights and their bearings which wear, two strong, small magnets slip onto the drive pins which previously held the advance weights. The most important advantages of the 123 ignition system is simple to installation without mechanical adaptations. It has a smoother engine torque curve. No maintenance – ever again! Variable dwell angle to prevent low speed overheating of ignition coil and make a better spark at all speeds. Better starting. Better emissions. Better fuel consumption. Built in LED for simple static ignition timing. I used a Crane and it failed after one year. The 123 is designed to last substantially longer. My 68' 280se coupe has run very well since I installed the 123. I believe any 40 year plus old auto should switch to this system.
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Britton McIntyre 68 280 SE coupe 'Hairball' 70 280 SL 71 280 SEL - RIP May 2010
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