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Old 11-12-2017, 10:10 PM
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Join Date: Sep 2000
Posts: 128
Ignition upgrade

People continue to tell me Mercedes 450 SLC needs copper plugs BECAUSE the ignition system has such low voltage/amperage.

So has anyone replaced the Mercedes coil and ignition module?

I have a MSD unit somewhere in my garage, I am assuming the distributor module can send the signal to the MSD unit.

Not trying for 75,000 volts, just more than the anemic 20,000 of the stock ignition module. I want to be able to replace everything as I have been saving every stock part I take off.
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Old 11-16-2017, 06:34 AM
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Join Date: Nov 2008
Location: bristol,tn
Posts: 5,449
upgrading ignition can really help with mileage,but don't expect horsepower gains.Older engines with less close tolerances,need a wider spark. most modern plugs use small diameter electrodes. A older motor would foul them quicker, with trash blowing around the combustion chamber.
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