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tubman · 11-07-2019, 11:54 AM

Ron, it was Sir Harry Ricardo. I can read what you wrote just fine.

I'll also second what you say about relocated extended tip plugs; my current '51 with a 255 Merc with carefully prepared Edmunds heads seems to have better "seat of the pants" performance than my old '36 coupe with a 276' Merc that I just bolted a set of Offenhausers on to without giving it a second thought. Now that I mention it, that car had an MSD ignition on it the produced quite a hot spark. I ran surface gap plugs in it (from an outboard motor) which sat flush with the surface of the combustion chamber, and it ran great and didn't foul. I had forgotten that until you jogged my memory.

11-07-2019, 11:54 AM	#68
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 10,319	Re: Spark Plug Protrusion into Head? Ron, it was Sir Harry Ricardo. I can read what you wrote just fine. I'll also second what you say about relocated extended tip plugs; my current '51 with a 255 Merc with carefully prepared Edmunds heads seems to have better "seat of the pants" performance than my old '36 coupe with a 276' Merc that I just bolted a set of Offenhausers on to without giving it a second thought. Now that I mention it, that car had an MSD ignition on it the produced quite a hot spark. I ran surface gap plugs in it (from an outboard motor) which sat flush with the surface of the combustion chamber, and it ran great and didn't foul. I had forgotten that until you jogged my memory.