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Thermostat: 87°C (B230FT) versus 92°C (B230FD) 900

posted by  fotajoye on  Sat Aug 8 17:31 CST 2009
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last visit: Wed Jan 9 18:24 CST 2013
[RELATED]

I have a '73 Datsun 240Z track car with an '82 turbo engine and inter-cooler. The information I read suggest running a 160 degree thermo instead of 190 degrees.
The reasoning has to do with the water cooling and oil cooling of the turbo bearing. The lower temperature helps to extend the life of the turbo by slowing down coking of the bearing. Additionally, the lower reflected heat from the radator to the inter-cooler helps reduce the heat of the compressed air flowing into the butterfly valve.

Perhaps this is in the thinking by the Volvo engineers. Even a reduction of 10 degrees would be helpful for a turbo engine.






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