Originally Posted by CarNoobLovingIt
So by increasing the distance you increase the size of the engine without actually increasing the size of the engine?
Yes, you increase the displacement, ie the volume of each cylinder, without increasing the external dimensions of the engine. This is done by swapping in a crankshaft with longer throws (arms). This means that you have to use either a shorter rod or move the wrist pin up on the piston or both. The stroker kit increases side loads on the pistons, and this as well as the h\physical space inside the engine limit how far you can go.