DIY_EFI Digest             Sunday, 24 March 1996       Volume 01 : Number 085

In this issue:

	Re: thermal effects of combustion chamber
	Re: Blackbird

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From: Corey Cole <colec@xxx.edu>
Date: Sat, 23 Mar 1996 13:45:22 -0700 (MST)
Subject: Re: thermal effects of combustion chamber

On Thu, 21 Mar 1996, Edward Hernandez wrote:
> 
> 1) The Jag is a 5.3L V12 while the Caddy is a whopping 8.2L V8. That 
> means that each cylinder of the Jag is less than HALF the size of the 
> Caddy. At equal burn rates, the Jag is much more likely to finish 
> combustion before the end gas detonates than the Caddy. That said, I 
> would venture an educated guess that the Jag chambers burn faster than
> the Caddy's, giving it another advantage.
I'm pretty sure that the Jag V-12 uses a "May" combustion chamber 
designed for ultrafast (real technical term there...ultrafast) 
combustion.  It allowed the Jag engineers to go with sky-high (yet 
another technical term) compression ratios while still meeting emissions
targets.  For info on the May combustion chamber, check out Richard 
Stone's book "Introduction to the Internal Combustion Engine".  There are 
three case studies on engine design, and the Jag V-12 happens to be one 
of them.

 Corey Cole					colec@xxx.edu
 '65 Skylark
"Knowledge is power...but cubic inches help."		Go #24!!!!!
 
I was drunk the day my mom got out of prison
and I went to pick her up in the rain.
But before I could get to the station in my pick up truck,
she got runned over by the darned old train...
						David Allen Coe
						Steve Goodman

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From: Corey Cole <colec@xxx.edu>
Date: Sat, 23 Mar 1996 14:03:30 -0700 (MST)
Subject: Re: Blackbird

On Fri, 22 Mar 1996 steveb@xxx.com wrote:

> WRT SR-71 and it's fuel ...
> 
> on cam.  I had noticed that there was a group of '50's american cars up 
> ahead so I thought it was one of them.  It turned out that I was wrong ...
> to spin the engines of the SR to the point where they could start they had
> built an APU that was built from a pair of Buick small-blocks, coupled 
> together through turbo-hydramatic trannies, which would then connect to 
> the shaft that spins the turbine/compressor shaft of the jet engine.  They 
> had really tricked the motors with all kinds of chrome and performance 
> goodies.  

Not to quibble, but I've seen that particular card in a book...Them are 
Nailhead 425s, not small blocks...As a Buick fanatic, I try to keep up 
with every use these engines get.


 Corey Cole					colec@xxx.edu
 '65 Skylark
"Knowledge is power...but cubic inches help."		Go #24!!!!!
 
I was drunk the day my mom got out of prison
and I went to pick her up in the rain.
But before I could get to the station in my pick up truck,
she got runned over by the darned old train...
						David Allen Coe
						Steve Goodman

------------------------------

End of DIY_EFI Digest V1 #85
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