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Join Date: Jan 2002
Location: I'm out there.
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Need thermostat education...
I think my '83 SC has 2 thermostats, right? One internal, finely machined thermostat and a second in-line mechanical thermostat in the right rear wheel well. ( I could easily be wrong about this.)
What are the opening temps for these t-stats? I presently have a trombone non-cooler. I am installing a Carrera cooler with fan and a B&B front cooler. The Carrera fan T-stat has a 100 degree switch. Do I need to change the other T-stats? I don't want to deprive my new coolers of oil till 240 degrees. Thanks. 
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10-23-2002, 04:01 PM
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Join Date: Apr 2002
Location: Santa Clara, CA
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Not to worry. The internal thermostat starts to open around 180F, the external a little higher. Your new coolers should be well fed!
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Chuck Moreland - elephantracing.com - vonnen.com |
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10-23-2002, 04:10 PM
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The internal and external cooler are controlled by the same mechanism ie the phase change of parafin from solid to liquid and back. In a model year they should be the same temp. There have been reports of variation however which I suspect are related to the timing where the hot oil doesn't get to the external thermostat untill after the internal one has been tripped for a while. Over the years the spec has ranged from ~80°C to ~87°C(~176°F-~189°F) The temperature of the phase change can only be changed by altering the chemical composition of the parafin.
The Carrera cooler electric fan comes w/ a thermstat that trips at ~188°F this temperature can be altered electrically but since your car will be overcooled a manual switch would be as usefull. The mod consists of a different thermoswitch which is available in 110, 99 or 91°C versions which are all available here at Pelican Thermoswitchs I would stick w/ the standard thermoswitch until I observed that there might be a problem somewhere down the road(not likely w/ your setup)
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Bill Verburg '76 Carrera 3.6RS(nee C3/hotrod), '95 993RS/CS(clone) | Pelican Home |Rennlist Wheels |Rennlist Brakes | Last edited by Bill Verburg; 10-23-2002 at 05:19 PM.. |
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10-23-2002, 05:15 PM
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Bill,
I got the 91C switch from Pelican. Now I'm wondering if I might run too cool. Guess there's no such thing. Just drive harder.
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10-23-2002, 06:47 PM
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1976 Porsche Carrera 3.0
1995 Porsche 993 Carrera Coupe
