440 and metalstorm, Could the boost increase that metalstorm saw an indication that the new cam wasn't flowing as much? The only way that I can see a cam making more boost on a blower motor is it is not using as much of the intake charge and it is backing up more pressure, seen as boost; as the supercharger will always be pushing out the same amount of air as long as the pulleys are not changed. Or another reason is if the motor is being wound out at a higher rpm to spin the rotors faster to make more boost, ie. flow more air. Am I thinking correctly? I've followed metalstorm and am building a blown 440 and am trying to pick a cam/lifter setup. I have a procharged SBC that I put a 110 LSA cam in and seem to have no issues, with the reason being that the overlap will keep the street driven exhaust valves cooler. Dan.