Re: Ignition tester

[JOSEPH BRINCAT]

OK , thanks Chris. I do understand the "hold the plug against the block" issue is far from a definitive test, but still looking for why "under compression" is any more valid than a wide gap test. Now maybe someone with more electrical smarts than I can come up with a chart comparing a given spark gap at various pressures ( PSI) against wider gaps in open air. My rule of thumb is that a good coil should be able to jump a spark across a 1/4 " gap in open air.

Joe B