Originally posted by WS6
From what I understand, PS uses less than 1hp and that is when you are turning. In straight line, there is no HP gain at all with or without the pump. Only benefit is weight reduction.
I am going with a manual box on my T/A for a cleaner install with the new motor and for weight savings. The Alternator will be the only belt driver accessory on my car. 
I'm also switching to manual steering for those reasons. It's ALOT (... and I can't stress it enough) to change the plugs and oil filter on a RX7 with the PS and AC removed. It also makes engine swaps alot easier and faster along with a cleaner looking engine bay.