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A very basic web search revealed they are Keith Black pistons. They should say SL on one side and KB on the other.
Also, on the piston ring issue: I install with the compression ring gaps forward and backward(9 and 3 o'clock), oil ring up(noon). Other methods abound, but oil ring up is always good.
Thanks Danny, I did a quick search and didn't get any results. I for some reason missed the KB of the side. I focused on the LS. I believe the pistons are the cast Hypereutectic aluminum alloy and not forged, which seem to work fine in all but the most extreme situations. I have used Keith Black forged pistons on hot Corvair turbo engines so it is funny that I didn't recognize the pistons. Thanks again for the help Danny!
No problem, Jimmy. Just sorry we won't be hanging together in a month........
I am playing with the idea of building this type 4 out to a 2.6L or larger engine.
Just hung up the phone with Bill the engine builder and he is ordering the parts today to make the type 4 I bought from Chris Sutton into a 2786cc torque monster that will develop over 220 ft/lbs of torque at 3500 rpm. The build will consist of 104 P&C's and a 82mm crank. It should really push the soon to be engineless Puma down the road. Stay tuned.
