Join Date: Jan 2006
Location: Patricia, Alberta, Canada
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My neighbor uses TRW 2443 forged pistons in his 460 natural gas irrigation pumping unit. Reasoning of his engine builder was that it was better to burn the fuel in the cylinder than in the exhaust port. With the D3 heads, it's probably around 11.5 to 1, but since these things run at constant rpm, detonation isn't an issue. When you can get relatively "free' power like when raising the compression ratio, I would think it's going to help fuel consumption because the throttle isn't going to be open as far to achieve the rpm desired.
And they are tough pieces - his Murphy guage was plugged on his water pressure, and he ran out of water in the night( for the pump), and the 460 reved mental until it blew up. It broke the head off of the stellite valve, and the piston punched it right through the haed, and the cylinder split so bad you could easily see the inside of the block through it, and the piston was still in one piece. :shock:
668. The neighbour of the beast.