Delco coil # 2178 needed for 33 roadster

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Need a pair of original Delco part # 2178 coils for my 1925 model 33 roadster.

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Two PA Society members offered coils much to my appreciation. Thank you!

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Chris, beware that these old coils are subject to breaking down electrically. The insulation around the windings of the transformer inside the coil will start to leak electric current and the coil’s output will decrease or completely fail.

So check the coils on good running cars, to test that they work correctly. Often the coil will work when color cool, but as the coil gets warm and the engine bay get HOT, then the coil will start to fail

I’ve had one of these coils act just like a lean carburetor, as the engine warmed up, the car ran weaker and weaker, like a lean mixture, but no missing, or backfiring. and the coil always had a hot blue spark at idle, and the engine idles smoothly. but would have very low power.

Just don’t get lead astray by assuming that a nice clean or even NOS coil is a good unit, it can have hidden issues.

Greg Long

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Greg – spot on with the coil. Had this happen on my ’38 Buick last year. Felt just like a carb issue when warm. By the time it out the carb sure was clean and adjusted well.

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As they say, 99% of all fuel delivery problems are electrical!

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Chris,

BTW, a few of we PAS guys have modern 6V coils mounted on the interior side of the firewall and have the wires covertly snaked to the distributor while having the original /correct coil APPARENTLY connected.

The wires from the original coil are long enough to just enter the loom and stop after one or two-inches.

They don’t connect, but look as though they do.

In that way, we are running off new coils.

Now some Gents may say that the old coils crank more power, but I DK on that matter.

Modern 6V coils are easily obtainable, like from a vintage VW parts supplier.

Peter

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I’ve also picked up 6v coils from NAPA as well but a VW place will most likely be cheaper.

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