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PCA Member since 1988
Join Date: Feb 2018
Location: SW Washington State
Posts: 4,647
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I have a 1973 coupe with 1979 SC RoW engine and SSIs. When I initially installed the engine, I went with the engine shroud heater air supply, rather than a separate electric fan. I like to keep things simple. I live in the PNW too.
The heat varies greatly depending on my driving. Around town, I have to crank up more heat, but when I get on the highway, I have to reduce it a lot, otherwise it will get really warm, even in 20-degree outside temps. The electric fan provides a much more constant air flow, but the heat still goes up and down depending on how hard you are driving (and thus heating up the exhaust pipes). You have to continually adjust the heat output either way, so I'll stay with the engine air system. Defrost sucks either way, unless you can use your AC system to dehumidify incoming air, like modern cars do.
I have thought about how to prevent loss of engine cooling air during the summer. It hasn't been a problem for me yet, but I am thinking about putting some simple flat plate valves in the outlets from the engine shroud to the hoses. Then I can manually close them in the summer for maximum engine cooling.
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners.
Cars are for driving. If you want art, get something you can hang on the wall!
Last edited by PeteKz; 02-06-2023 at 10:15 PM..
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