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tubman · 10-20-2019, 08:11 PM

I stick about 10 or twelve balls around the bottom half of the piston (the top half is in the transfer area and doesn't count). Let's face it; aluminum foil is cheap and easy to get.

BTW, I like the fact that you are taking this route, no matter what others say. In my opinion. the most effective thing you can do to get the maximum efficiency from a flathead is to get the "squish" right.

Oh, by the way, put a couple of balls on top of the valves. I have never had a problem there, but better to be safe than sorry.

10-20-2019, 08:11 PM	#4
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 10,316	Re: Location of tinfoil to check CR I stick about 10 or twelve balls around the bottom half of the piston (the top half is in the transfer area and doesn't count). Let's face it; aluminum foil is cheap and easy to get. BTW, I like the fact that you are taking this route, no matter what others say. In my opinion. the most effective thing you can do to get the maximum efficiency from a flathead is to get the "squish" right. Oh, by the way, put a couple of balls on top of the valves. I have never had a problem there, but better to be safe than sorry.