RogerH Posted January 28 Report Share Posted January 28 (edited) 2 hours ago, Barry Bell said: Correct - never ever use a wire brush for reasons stated. And the firing end of ceramic was never glazed. - I was 32 years working for Champion Hi Barry Welcome to the forum. thanks for that. Your 32 year career would take you back to 1990 or so. Still quite modern car technology. How did champion make the plugs in the 1960's for example. I see the Vincent owners club were raising the same question 10 years ago. Champion had a manufacturing site at Hatton Cross Near Heathrow Middlesex. How did they make for example an L87 plug. Roger Edited January 28 by RogerH Quote Link to post Share on other sites
mleadbeater Posted January 28 Author Report Share Posted January 28 (edited) Yes, welcome Barry. So, as a “champion “ of spark plug manufacture (sorry), who maked the best and worst plugs? Or if you can’t comment, what makes a good plug and a bad plug? Mike Edited January 28 by mleadbeater addition Quote Link to post Share on other sites
Tim D. Posted January 29 Report Share Posted January 29 18 hours ago, Barry Bell said: Correct - never ever use a wire brush for reasons stated. And the firing end of ceramic was never glazed. - I was 32 years working for Champion Good to know. Tim Quote Link to post Share on other sites
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