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1. Octane (score: 1): Author: "John Beckett" <saltracer@servusa.com>; Date: Fri, 16 Jul 2004 13:06:52 -0400; Question: Why do the low compression (I think 9 to 1) NASCAR motors run hotter combustion temps then the 12 to 1 motors? Believe the fuel is different too as the low compression motors may have to ru; /html/land-speed/2004-07/msg00271.html (6,564 bytes)
2. RE: Octane (score: 1): Author: "Dave Dahlgren" <ddahlgren@snet.net>; Date: Fri, 16 Jul 2004 14:30:20 -0400; because they are less efficient thermally. probably not affect timing at all. that is more linked to bore size and chamber design. dave; /html/land-speed/2004-07/msg00275.html (7,193 bytes)
3. Re: Octane (score: 1): Author: "John Burk" <joyseydevil@comcast.net>; Date: Fri, 16 Jul 2004 14:25:11 -0400; John - Could be with less compression and spark lead combustion is slower and the exhaust is hotter which heats the exhaust jackets more .; /html/land-speed/2004-07/msg00276.html (6,383 bytes)
4. Octane (score: 1): Author: Scott Cowle <scowle@mentorcollege.edu>; Date: Tue, 20 Apr 2004 09:39:34 -0400; Is it possible to use too high an octane rating, My understanding is that the higher the rating the slower the rate of burn. So logically one would want only enough octane to cover detonation- Is thi; /html/land-speed/2004-04/msg00256.html (7,277 bytes)
5. RE: Octane (score: 1): Author: "Dave Dahlgren" <ddahlgren@snet.net>; Date: Tue, 20 Apr 2004 10:07:53 -0400; Actually it is not even close.. most modern fuels burn at relatively the same speed. It is all in the chemistry as to how they resist detonation and octane number is only part of the issue. The best; /html/land-speed/2004-04/msg00257.html (8,467 bytes)
6. Re: Octane (score: 1): Author: "Thomas E. Bryant" <saltracer@awwwsome.com>; Date: Tue, 20 Apr 2004 07:57:09 -0700; The short answer...YES. This is probably one of the average driver's most misunderstood facts about fuel today. (We in the performance arena have a little better handle on it) Oil companies heavily; /html/land-speed/2004-04/msg00260.html (8,424 bytes)
7. Re: Octane (score: 1): Author: RACE427@aol.com; Date: Tue, 20 Apr 2004 18:22:21 EDT; The higher the octane of gasoline the lower the BTUs. Higher octane means lower heat energy, therefore lower expansion of gases to push the piston down to create power and torque.; /html/land-speed/2004-04/msg00273.html (7,214 bytes)
8. Re: Octane (score: 1): Author: Chris Harris <yesford@clear.net.nz>; Date: Wed, 21 Apr 2004 11:39:03 +1200; down to Thanks for that Tony. Now that's a little gem I wasn't aware of. Chris Harris.............NZed; /html/land-speed/2004-04/msg00275.html (7,444 bytes)
9. Re: Octane (score: 1): Author: RACE427@aol.com; Date: Tue, 20 Apr 2004 22:31:24 EDT; I was under the impression that richer mixtures run cooler than lean ones?; /html/land-speed/2004-04/msg00280.html (7,113 bytes)
10. Re: Octane (score: 1): Author: "Thomas E. Bryant" <saltracer@awwwsome.com>; Date: Tue, 20 Apr 2004 21:13:02 -0700; I was taught that the hottest mixture is about 10% on the rich side. Lean mixtures burn pistons because the heat is applied to the piston for a longer period of time, a slower burn. I'm not saying th; /html/land-speed/2004-04/msg00283.html (7,430 bytes)
11. RE: Octane (score: 1): Author: "gary baker" <lsr350@hotmail.com>; Date: Wed, 21 Apr 2004 20:16:43 +1000; Gary _________________________________________________________________ You could be a genius! Find out by taking the IQ Test 2003. $5.50 (incl GST). Click here: http://sites.ninemsn.com.au/minisite/t; /html/land-speed/2004-04/msg00284.html (8,793 bytes)
12. RE: Octane (score: 1): Author: "Dave Dahlgren" <ddahlgren@snet.net>; Date: Wed, 21 Apr 2004 07:16:14 -0400; You might want to read this and think about it a little more.. http://www.ercracingfuels.com/sxs1.htm please explain the BTU concept again?? here some others to ponder... http://www.cs.uu.nl/wais/htm; /html/land-speed/2004-04/msg00285.html (9,787 bytes)
13. RE: Octane (score: 1): Author: "Dave Dahlgren" <ddahlgren@snet.net>; Date: Wed, 21 Apr 2004 07:22:55 -0400; Nice well thought out choice of fuels.. When you hook up the rear tire it might change the tune up so don't get too comfortable yet. You are not makeing HP if the wheel is spinning or at least not lo; /html/land-speed/2004-04/msg00286.html (9,249 bytes)
14. Re: Octane (score: 1): Author: Bryan Savage <basavage@earthlink.net>; Date: Wed, 21 Apr 2004 11:23:02 -0700; The highest octane ERC gas, A-18C @ >120.3 also has the highest BTU @ 20,122. The burn rate is determined by the chemistry. A-18C @ >120.3 burns faster than 110K @ 115.5. and A-8C @ >120.3 burns slo; /html/land-speed/2004-04/msg00288.html (7,764 bytes)
15. Re: Octane (score: 1): Author: "Thomas E. Bryant" <saltracer@awwwsome.com>; Date: Wed, 21 Apr 2004 15:31:28 -0700; I had a similar experience several years ago while attending a Seminar by Champion Spark Plug. They had an engine on the dyno equipped with spark plugs which indicated cylinder temperature. A little; /html/land-speed/2004-04/msg00289.html (8,242 bytes)

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