From: charliesiv@att.net
To: lancair.list@olsusa.com (List Lancair)
Subject: ROP vs LOP
Date: Wed, 02 May 2001 13:22:26 +0000
Message-Id: <20010502132226.HRFP2578.mtiwmhc26.worldnet.att.net@webmail.worldnet.att.net>
Reply-To: lancair.list@olsusa.com

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I'm glad to see George B. entered our discussion. 
I have two comments that I would enter for our readers 
consideration.

First, John Deakin's article "Those Fire Breathing 
Dragon's" used GAMI data and charts that were based on an
0-470 nonturbo engine. 
George, in his comments to the List referenced a TIO-540 
(Lycoming). 
I maintain that while the comparison is not oranges and 
apples, it IS green cooking apples, to Golden Delicious 
apples.  
I maintain that George's statement that-- given the 
conditions of 100 degrees ROP, 100 L. L., hottest CHT 
420F, "will run one or two cylinders continuously in 
light detonation, as measured by the FAA's current 
detonation criteria" --IS NOT necessarily applicable to 
the TSIO 550. Even individual model numbers (B vs E) 
engines or early cylinders vs late model cylinders may 
skew the data. And even engine to engine configuration 
(intake turbulence due to pipe misalignment etc. etc.) 
would negate the comparison.
Secondly, no reference is made in any of the comments as 
to longevity and life expectancy of cylinders operated 
at LOP. I doubt that operation LOP (without additive 
insertion (MMO)) will ever equal (hours) at ROP due to 
the aforementioned lack of upper cylinder lubrication.  
Here again, data collection needs to be from like make- 
model.
Even George requires data from YOUR engine prior to 
selling you GAMI injectors.

Charlie K.

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