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Re: New (2006) TSIO550E Lean of Peak (LOP)
Operation
Who amoung us has asked for a fix or refund from TCM based on the
EGT/GPH spread >0.4 gph? Before I launch into that discussion
with TCM, I'd like some substance and history on previous discussions
of a similar nature.
Likewise, I'd love to see others' EGT spread vs mixture (gph)
data for the TSIO550, particularly from those that claim a tighter
spread, so I can reference this info in my discussions with TCM.
Specify if these are GAMI injectors or TCM injectors.
Help me...
Jeff L
From: Walter Atkinson <walter@advancedpilot.com>
I shoot for a .3 GAMI spread or
better. Some engines can run acceptably smooth with a .4
spread.
Frankly, yours are not much better than
many of the old standard TCM injectors. I'd want TCM to fix
that, or give me a refund.
Walter
From: "Jeffrey
Liegner, MD" <liegner@earthlink.net>
Date: November 26, 2006
6:44:05 PM PST
To: lml@lancaironline.net
Subject: Re: New
(2006) TSIO550E Lean of Peak (LOP) Operations
George is the most renowned advisor on
tuned injectors and engine management.
What I thought was a fairly tight
grouping of EGT peaks with the new TCM engine appears to be less than
optimum compared to GAMI standards.
Replotting the data with more carefully
analysis at the peak temps:
PEAK Fuel
Flow
Cylinder 1: 21.1
gph
Cylinder 2: 21.6
gph
Cylinder 3: 21.1
gph
Cylinder 4: 21.8
gph
Cylinder 5: 21.0
gph
Cylinder 6: 21.6
gph
Spread: 0.8 gallons per hour
(This stuff is
fascinating)
Posted for "George Braly" <gwbraly@gami.com>:
Jeffrey,
If that is a TCM copy of GAMI's fuel
injector set up, they you need
to ask for your money back.
That is a fairly lousy set of fuel /air
ratios.
Your #4 consistently is the leanest cylinder and
your # 1 & 5 are
consistently rather much richer ( by 1 gph or so).
This is not a trivial issue for one of the se
engines. They tend to
operate much better with the F/A ratios such that the
spread in fuel
flows is down around 0.3 gph.
Regards, George
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