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- From: ed@northstar.Stanford.EDU (Edward Wilson)
- Subject: Re: Oil Coolant Engines?
- Message-ID: <1993Jan27.172345.21647@leland.Stanford.EDU>
- Sender: news@leland.Stanford.EDU (Mr News)
- Organization: stanford
- Date: Wed, 27 Jan 93 17:23:45 GMT
- Lines: 25
-
- > Air cooling alone is insufficient for modern engines. The
- > distortions due to temperature gradients are unacceptable in a
- > high-precision engine. You need some kind of liquid
- > convection. Water is ideal in almost every way; oil is less
- > ideal for pumping and heat transfer, but could greatly simplify
- > the castings and plumbing.
- >
- > Tom Leone <tgl@slee01.srl.ford.com>
-
- This all makes a lot of sense, but what about the 911 turbo (somewhere
- around 300 HP, as I remember), using ~11 quarts of oil for
- cooling/lubrication? What do they do to get around these problems you
- point out?
-
- Related note: would this make air-cooled engine designs tend to be
- underpowered (for example, my '81 Vanagon, which does 0-60 in 21.2
- seconds), since they can't handle the thermal gradient and can't be
- pushed too hard (i.e. the fuel injection is designed to limit peak
- power, prolonging engine life). Is this how motorcycles get
- significantly more power per cc - at the cost of engine lifetime?
- Where does the 911 fit in here?
-
- Just wondering ...
- Ed Wilson
- ed@sun-valley.stanford.edu
-