Mailing List lml@lancaironline.net Message #31064
From: <Sky2high@aol.com>
Sender: <marv@lancaironline.net>
Subject: Re: [LML] Re: Lower Cowl Air Temperature - Induction Air - Heater Air Temp
Date: Sun, 07 Aug 2005 23:25:28 -0400
To: <lml@lancaironline.net>
In a message dated 8/7/2005 2:22:55 P.M. Central Standard Time, walter@advancedpilot.com writes:
Yep, the purpose of the carb atomization is to make smaller droplets
that then can be more easily vaporized while the F:A mixture is still
in the induction system.  The better that is accomplished, the better
the F:A balance between cylinders.

Walter,
 
Better, but never very good..  Gary's comment is also slightly suspect because Taylor indicates injected engine air temp can be and has been measured at the cylinder (It's Sunday, and I am tired of Google searches at the end of the week)..  Carb engines are notorious for the poor F/A balance in each cylinder - air just doesn't seem to make it around the different corners to get good results..  I have been reading Taylor and simple comments will no longer work for me without data.  We can have our beliefs to be whatever we want but injected engines can achieve a greater efficiency than carbed ones....besides the splash that is vaporized on hot cylinder surfaces, there is clearly atomization, atomization that can be enhanced by proper inserted air under pressure or, no additional air is required at all if a sophisticated multi-port electronic injector is used.  Honda will show the way........
 
Anyway, I give up on this thread because Octane and timing, valve characteristics and induction mixture swirl are at least as important as air temp and compression ratio when one is thinking about detonation.  There just ain't no simple answer.  Experimentation is still possible....
 
My personal brain timing has now been retarded to avoid self-detonation..........
 
Scott Krueger AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL (KARR)



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