[cmonref]

acapella8,

Do not be so quick to replace your blower motor on the engine. Once you get the plumbing right between the heat exchangers and the flappers, the flappers hooked up to the heat levers at the brake lever, and make sure that the ducting in the engine compartment is all present and connected and not leaking, you will find that you have PLENTY of heat -- even for Chicago.

The heater blower was added by Porsche to meet US specs for a heat system that would "work in the driveway" like a typical American car -- that is, heat moving being felt at idle. At anything above idle, the engine fan forces FAR more heat into the cabin than does that puny fan. Just hook up the ducting and unplug the motor (to prevent the inevitable screeching when it runs out of lubricant).