<VV> Turbo Tidbits No Corvair

[Joseph Robbins]

In another life I drove semis with turbos and we always let them idle a
little before shutting them off, I always thought that this was to allow the
turbo to get to idle speed so it still wasn't spinning with no oil. 
Another tidbit was when I worked at a John Deere dealer and hauled tractors,
and those have turbochargers so the factory put a plug in the exhaust pipe
after they drove them on the trailer, same with combines. Why you ask, well
they discovered that if the motor shut down and the valves were in just the
right position, it would allow air in through the exhaust pipe as it went
down the road and that air going in could spin the turbo and with no oil,
cause a problem. If you ever see a tractor on a semi trailer and there is
duct tape on the exhaust pipe, now you know why.
Now you know way more than you ever wanted to know...

Joe Robbins
Head Trucker BBRT




-----Original Message-----
From: virtualvairs-bounces at corvair.org
[mailto:virtualvairs-bounces at corvair.org] On Behalf Of grant young
Sent: Sunday, January 21, 2007 7:23 AM
To: Virtual Vairs
Subject: <VV> Turbo Cooling Question

HI all. Thanks to many who provided insight on the PT Cruiser and HHR's. We
purchased a PT GT with the High Output 2.4 turbo engine, select shift
transmission, 17" wheels, leather, etc. I'm afraid that when the boost comes
in, it puts our cars to shame :-). But then, it doesn't have that great
Corvair style and engineering :-). My question is on the Corvair turbo,
however. The PT owners manual states that for normal driving, there is no
need to let the engine idle prior to shutdown, but if you have been driving
"aggressively" for a short period of time or driving with a heavy load (boy
that one is open for interpretation :-), then you should let it idle for 3
minutes prior to shut down. If you have been driving aggressively for a long
period of time, or towing a trailer, you should let the engine idle for 5
minutes, to allow the turbo to cool properly. I don't have a Corvair turbo
owners manual handy, but did it suggest such procedures? Thanks,
Grant
PS. The Pantera is in it's last 12 hours and has met our reserve, so if you
want at good deal you better jump in. It is at only $30,100 right now.


Grant Young
Wolf Enterprises
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