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- Newsgroups: alt.hotrod,wiz.hotrod
- Path: sparky!uunet!rsiatl!hotrod
- From: hotrod@dixie.com (The Hotrod List)
- Subject: Smokey's Amazing Engine
- Message-ID: <#ncsqvd@dixie.com>
- Date: Tue, 26 Jan 93 22:31:34 GMT
- Organization: Dixie Communications Public Access. The Mouth of the South.
- To: hotrod@dixie.com
- Reply-To: hotrod@dixie.com
- Posted-Date: Tuesday, Jan 26 17:31:30
- X-Sequence: 3629
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- X-Gifs-From: ftp.nau.edu
- Approved: jgd@dixie.com
- Lines: 33
-
-
- Its amazing that people still remember that article on
- Smokey's Amazing Engine from 10 years ago. It was in the
- April 1983 issue of Popular Science (the National Enquirer
- of scientific literature). I've used the article as part
- of a final exam problem I give in my Internal Combustion
- Engines class. The article says the intake manifold
- pressure is only 0.5 psi above ambient but the exhaust gas
- is passed through a heat exchanger to heat the intake air
- to 400 deg F. This is supposed to ensure fully vaporized
- fuel which is part of his secret. His patent is supposed
- to explain how he can run the engine with a high intake
- temperature without knock. The article also says that he
- gets a peak torque of 165 ft-lb at 4400 rpm with a 78 cubic
- inch two-cylinder engine. The engine is four-stroke, spark-
- ignited and carbureted.
-
- Any engine with a 400 degree intake temperature will have
- a very poor output because of a low volumetric efficiency.
- However, the real problem comes when you calculate the
- brake mean effective pressure for his engine. Using the
- numbers given above, the BMEP comes out to be 319 psi.
- I contend it is not physically possible to get this high of
- a BMEP in a naturally aspirated engine running on regular
- unleaded gasoline (as Smokey says he is). Most naturally
- aspirated engines run in the range of 100-130 psi.
-
- To be fair to Smokey, I suppose its possible he was
- mis-quoted. However, the most frequent question my
- students ask is: "just what is this guy smoking?"
-
- ----------
- Posted by: emory!IASTATE.EDU!jvg (Gerpen J Van)
-