The car I’m working on will eventually retire to a leisurely life in Washington -a state well known for its rainfall. As such, I decided a good forced air system to heat the cabin and defog the windscreen was a good idea. I have the original fan impeller mounted on a modern motor in my Sprint and it works okay -you can feel a little moving air, but it’s not very impressive (admittedly most of my ducting is leaky original BS or ill-fitting replacement BS, so maybe an unfair test). Anyway, I was perusing the McMaster catalog when I found a 4″, 12 volt all-in-one in-line blower fan.
Applications: Sprint and sprint Veloce.
Failure mode: electric motor failure.
Current state of parts: repair original or find something to adapt in place of the original.

This is where the Air intake plenum lives. It’s designed to act as a ram-air and I imagine at over about 40 mph the air forced in is moving faster than the original fan could push it in. The rest under here looks pretty nice…
Continue reading “Heater part 3: Air intake, front, with motor 1493.54.708”