<VV> turbocharger cooling

[Frank DuVal]

I want to know why you have needed three thermistors.

Early (Spyders) turbos always seem to run hot on the gage. 500 here in 
the summer is common with high speed driving on the interstate. 475 for 
moderate interstate drivers... Early in my ownership I pegged the gage. 
Then I hooked up the buzzer properly! ggg

In 20 years of driving my Spyder, I never thought to idle before 
shutdown. The turbo never needed attention. I guess I'm lucky. That will 
change!

Frank DuVal

Dave Thompson wrote:

>OK,
>I have a 63 Spyder clone with a 64 drive train. I'm on my third thermister.
>Each one read slightly different on the CHT instrument so I know that the
>CHT instrument is not totally accurate. With that in mind, On surface
>streets, I currently indicate about 375 degrees. After a minute or two at
>freeway speeds it raises to about 425 degrees. I have never seen it get any
>higher than that. When I come off the freeway, it comes back down after a
>minute or two of surface street driving. If the CHT is above 375, I let my
>engine idle until CHT is around 375 before shutdown. However, if I drive for
>a few blocks and the CHT is at 375 or below, I just shut down when I stop. I
>use my CHT to determine if I need to idle before shutdown. Of course, if I
>had just jumped on it to get some boost, I let it idle or drive moderately
>for a few blocks before shutdown.
>
>With the string that is going on here I wonder if I should idle for a minute
>or so before every shutdown. What are you guy's opinions on my current
>procedure? Should I modify it? If so, How?
>
>Dave Thompson
>36 Spyder vert
>Westminster, CA
>
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