Water Cooled Turbos

[isham-research.freeserve.co.uk at pop.pol.net.uk]

> can't resist a smile at the inclusion of sae papers in this context, but i
> digress....

Some of them are interesting, like the graph of component temperatures
after engine shutdown for air-cooled and water-cooled turbos included as
Figure 9 in Audi's SAE 860103.

Full SAE library reference is 0148-7191/86/0224-0103$02.50

P.S. Yes, air-cooled and not oil-cooled.  Oil plays no major part in
     heat removal - the key is airflow.  The way to cool a non-water
     cooled turbo is not to stop and idle the engine for 40 seconds,
     but to coast for the last 40 seconds of the trip and shut the
     engine off when you arrive.  With the car stationary, there's no
     airflow over the turbo and it cools mainly by radiation and
     convection, i.e., slowly.

--
 Phil Payne
 http://www.isham-research.freeserve.co.uk/quattro
 Phone +44 7785 302803   Fax: +44 7785 309674