[sci.electronics] Need design help: Engine idler for turbo cooldown

mm@lectroid.sw.stratus.com (Michael Mahler) (05/31/91)

	I'd like some help, please.  I have a turbo driven car and
	am getting tired of having to wait for the turbo to cool
	down before shutting the car off (anywhere from 2-5 minutes).
	Sometimes I absolutely HAVE to get out of the car immediately
	upon arriving and just leave the car running, and I prefer
	not to do this.

	I'd like help designing a circuit that I could build and
	install that would let the car run an addition pre-selected
	time (AFTER I've removed that key from the ignition and 
	left the car) and then turn the ignition off.

	I would like to be able to vary the delay, whether by a simple
	pot or by a keypad entry, but that's not important right now.
	
	I'm looking for ideas? 

	Michael

	PS:  Yes, I know these are available from some places but
	I refuse to pay $100.00 for $10.00 worth of of parts.

-- 

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What's said above has nothing at all to do with what's
said by the company I work for.

bill@thd.tv.tek.com (William K. McFadden) (06/08/91)

As I understand it, the reason for leaving the engine running is to
circulate the turbocharger's cooling oil.  I have heard about add-on
kits that consist of a pump that circulates the oil for a few minutes
after you shut off the car.  This would probably do what you want.
-- 
Bill McFadden    Tektronix, Inc.  P.O. Box 500  MS 58-639  Beaverton, OR  97077
bill@tv.tv.tek.com, ...!tektronix!tv!bill                 Phone: (503) 627-6920
"Wouldn't it be nice to live in a society where people were more important than
rules and the intent of the law more important than the letter?"