Yes you can lose both sections of the sump (alloy and steel) if you go dry sump. The oil pump is a separate unit on the front of the motor, driven by the timing belt, as they are on all "S" motors. Sam I wouldn't contemplate using a 2S setup. That's how you lose motors, especially for circuit work. The stock Beams setup is quite good, but if you really cant fit it go dry sump.