Quote:
Originally Posted by mgarblik
I think some of the Indian Adventures blocks were delivered with 3.25" mains. That would make a nice engine. Also a stock block 455 would be fine IMO with aluminum rods and light pistons. Probably want to keep the piston speed down a bit with that long stroke and high bearing speed. Properly built, it would be fine around 6500 RPM's. Tons of torque. Love to have that in a heavy street car.
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the piston speed is fixed to the stroke length, it can't be decreased at all with lighter parts. you'd have to destroke the crank to decrease the piston speed.
unless you meant probably want to keep the piston/rod weight down, with that high piston speed/bearing rubbing speed.