1968 ignition coil

[greggome]

I need a coil for my 68 327/350. The coil in now is a chrome accel but its years old with no defining information on it. I see that after market coils have all types of Ohm ratings. i have seen .6 up to 1.5 primary resistance ratings on aftermarket coils. Looking at my shop manual I see a rating of 1.77 to 2.05 V-8 (non Transistor and .41-.51 V-8 (Transistor) primary resistance-Ohms for the coil(not sure what transistor vs non transistor is).

So far I have not seen any ratings as high as whats shown in the shop manual and i am confused as to what the importance of the Ohm level is. Most of the after market suppliers eg. accel mallory, pertronix indicate their coils fit my car but the ohm ratings are different. any ideas, suggestions, or comments on this?

 

[LLC5]

I need a coil for my 68 327/350. The coil in now is a chrome accel but its years old with no defining information on it. I see that after market coils have all types of Ohm ratings. i have seen .6 up to 1.5 primary resistance ratings on aftermarket coils. Looking at my shop manual I see a rating of 1.77 to 2.05 V-8 (non Transistor and .41-.51 V-8 (Transistor) primary resistance-Ohms for the coil(not sure what transistor vs non transistor is).

So far I have not seen any ratings as high as whats shown in the shop manual and i am confused as to what the importance of the Ohm level is. Most of the after market suppliers eg. accel mallory, pertronix indicate their coils fit my car but the ohm ratings are different. any ideas, suggestions, or comments on this?

Non Transistor would be points and condenser, and Transistor would be electronic ignition replacing the points and condenser in the distributer. If the ohm's are too low in a points and condenser ignition, the points will arc and go bad sooner than they should. If the shop manual states 1.77 to 2.05 ohms, and all you can find is a 1.5 ohm coil you should be ok using it as it is close enough. If you have an electronic ignition system in your distributer, then use the lower ohm rated primary side coil as it will build up primary voltage quicker, resulting in a higher secondary voltage to the plug wires. The transistor in an electronic ignition distributer will not arc or go bad at the lower ohm ratings (assuming that the system is a quality unit). Good luck with it.