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Ol' Ron · 11-02-2019, 11:03 PM

I don't understand why the aftermarket doesn't move the plug to the center of the transfer area and be done with it. This has allot of benefits, besides running into the exhaust valve. Run a power tip plug shorter flame front and shorter advance . economy and more. The original position over the exhaust valve was to keep the plug clean (burn off the carbon) . But the number of flathead cylinder heads sold is avery small percentage of the bottom line/ A wedge style combustion chamber and a corisponding wedge piston could give 9/10 compression in a 239 engine tha would still run on 87 oct. I tried to have EGGe make a set for me 20 years ago, but 600 bucks for the set was way beyond my means. But a few years they showed up at Bville. Sour grapes I know. but???

11-02-2019, 11:03 PM	#18
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,860	Re: Spark Plug Protrusion into Head? I don't understand why the aftermarket doesn't move the plug to the center of the transfer area and be done with it. This has allot of benefits, besides running into the exhaust valve. Run a power tip plug shorter flame front and shorter advance . economy and more. The original position over the exhaust valve was to keep the plug clean (burn off the carbon) . But the number of flathead cylinder heads sold is avery small percentage of the bottom line/ A wedge style combustion chamber and a corisponding wedge piston could give 9/10 compression in a 239 engine tha would still run on 87 oct. I tried to have EGGe make a set for me 20 years ago, but 600 bucks for the set was way beyond my means. But a few years they showed up at Bville. Sour grapes I know. but???