Dynaflash8 Posted October 6, 2016 Share Posted October 6, 2016 My 1939 Buick Special refuses to run hot with Pertonics. Going to try one more time with Pertronics coil, new wires and spark plugs. Tried the car at both .028 and .035 spark gap using original AC-46 plugs a new original Delco coil plus old coil that was working fine. Same result: breaking down when hot. Bought new Pertronics coil and new custom wires. Now want to try with new spark plugs too. But I do not know what spark plug to buy or what gap. The wire guy said AC R47S set to 045. No such plug available. Anybody know the answer? If this doesn't work, going back to points and condeser. Car ran fine before. Same old story: If it ain't broke, don't fix it. Link to comment Share on other sites More sharing options...
Ben Bruce aka First Born Posted October 6, 2016 Share Posted October 6, 2016 Have you consulted with Pertronix? I installed Pertronix, along with their coil, in my '50. Never a moments trouble. Used the same plugs as before. I had changed to 12V. Am running .045 plug gap. Ben Link to comment Share on other sites More sharing options...
Daves1940Buick56S Posted October 6, 2016 Share Posted October 6, 2016 Try R46's, they are usually available on flea bay. One step cooler. Cheers, Dave Link to comment Share on other sites More sharing options...
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