The pistons that will be hung on the
rods will be made by
Ross. These pistons are forged 2618 Aluminum. Ross has been
in the piston business for a long time and know what there doing.
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This is a shot of the top. These are
flat-top piston and have minus 6cc's domes. This means that which you
can see where the valve cut-outs are. I didn't want to go with a very
high compression engine because I will still be using pump gasoline.
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In this shot you can see how small the
skirts are which is because of the large stroke crankshaft. The skirts
would be larger if I had went with a smaller cubic inch motor. The
skirts are the area just below the wrist pin hole. Notice the pin hole
goes into the oil ring groove. Ross includes special lock rings to
prevent the bottom ring from spinning. If the bottom ring were to spin,
the gap between all of them might line-up and would have the potential
to have oil in the wrong places like the combustion chamber. Speaking of
oil, the two small holes in the oil ring groove next to the piston pin
hole are angle drilled to add oil to the piston pin. It's like this on
both sides. This is a very nice feature that Ross came up with.
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Ross did a very nice job of machining
the entire piston. Being a machinist, I know when someone has done a
good job and this is a nice piece.
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Here you can see what a nice job they
did on profile milling the sides. You can also see where Ross removed
material form the sides next to the wrist-pin area. The wrist-pins have
a .145" wall which is heavy and I might be getting some lighter
ones, but we'll see. Remember....all that weight add up ya know!
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