Quote: Hi Pat - forgive me, but isn't the "stroke" of the engine determined by the offset between the crank axis and the big-end crank pin? The swept voume is determined by the distance between the position of the crank pin at the bottom of the stroke and its position 180 degrees later at the top of the stroke. Moving the crank pin outwards will increase this distance, moving it in reduces it. Just changing the rod length will not alter the stroke - all you will do is move the swept volume up or down the cylinder - but it will remain the same. When a "stroker" crank is fitted, the crank pin is moved away from the crank axis (relative to stock) to increase the swept volume - and the rod length may be changed to stop the piston being pulled out of the bottom of the bore or to avoid the piston hitting the valves/head ...Is there enough "meat" in the crank webs to accommodate a moved crank pin and is there enough clearance between the rods and the bottom of the wiseco liners?
