07-09-2025, 07:26 PM
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#23
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Senior Member
Join Date: May 2010
Location: Charlotte NC KiWi-L100 available here
Posts: 3,262
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Re: Won't run past 3500 rpm
Quote:
Originally Posted by Southtowns27
UPDATE: It runs. I talked to a buddy that races a flathead at TROG and the like. He mentioned that his magneto had a tendency to burn the cores out of spark plugs and it'll act just like I described. I thought no way, but I was running a 60,000V coil, relatively high compression, and a large-ish plug gap. So what the heck, I threw a new set of plugs in it, put a stock coil back on, tightened up the gap and now it rips. The old plugs don't have continuity through them measured with a multimeter. I've never seen that before and would have NEVER guessed that was the issue. They look perfectly fine (not fouled, etc) but they're 100% bad...
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Fantastic. Stock ford ignition systems for the most part are Great.
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