28-07-2024, 01:18 PM
I have a 1930 Chummy with a 1934 engine, high compression head and L86C Champion plugs.
I don’t do many miles but on the last couple of runs of less than 5 miles one or more have failed. Definitely plug failure as I’ve done the screwdriver to block test to check. Today I replaced 2 and 3. Previously it was number 4.
Timing might be on the over advanced side but when the plugs are good it runs and pulls nicely.
Any thoughts on possible causes or alternative plugs would be welcomed
I don’t do many miles but on the last couple of runs of less than 5 miles one or more have failed. Definitely plug failure as I’ve done the screwdriver to block test to check. Today I replaced 2 and 3. Previously it was number 4.
Timing might be on the over advanced side but when the plugs are good it runs and pulls nicely.
Any thoughts on possible causes or alternative plugs would be welcomed