Today's Message Index:
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1. 03:13 PM - Rotax E-Learning video on detonation and pre-ignition (Roger Lee)
2. 03:55 PM - Re: Rotax E-Learning video on detonation and pre-ignition (rparigoris)
3. 04:42 PM - Re: Rotax E-Learning video on detonation and pre-ignition (Roger Lee)
4. 08:13 PM - Re: Rotax E-Learning video on detonation and pre-ignition (rparigoris)
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| Subject: | Rotax E-Learning video on detonation and pre-ignition |
FYI
Rotax E-Learning video on detonation and pre-ignition.
Watch it.
http://rotax-owner.com/index.php?option=com_content&view=article&id 1:detonation&catid=15:training&Itemid=174
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Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=322879#322879
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| Subject: | Re: Rotax E-Learning video on detonation and pre-ignition |
Hi Roger
Thx. for posting link to video on Detonation and Pre-ignition.
They mention in the video use of a Carbon Monoxide tester to determine you are
running rich enough (the more Carbon Monoxide present the richer you are running).
I know Rotax wants you to measure the Carbon monoxide on each cylinder of
a 914 when you are creating "War Emergency Power" (above 108% power).
Have you ever measured Carbon monoxide? Can you go into details of how you plumbed
to measure and what monitor you used.
If you don't have any experience measuring Carbon Monoxide, can you point me to
someone who has?
I purchased one of these and am getting closer to using it:
http://www.europaowners.org/forums/gallery2.php?g2_itemId=78722
BTW I have modified my intake system (intercooler).
Thx.
Ron Parigoris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=322884#322884
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| Subject: | Re: Rotax E-Learning video on detonation and pre-ignition |
Hi Ron,
I confess I do not really have any experience with the carbon monoxide tester.
It usually isn't needed for a 912, but certainly could be helpful with the 914.
There just isn't many 914's around. little by little they are growing, but at
$31K not very fast. The second hand military ones aren't even supposed to get
on the market, but a few individuals have managed to get their hands on a few
and then they make the claim about an overhaul, but it is superficial at best.
A real overhaul on a 914 would cost a pretty penny. I don't know of a sole
using the CO tester.
Sorry
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Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=322887#322887
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| Subject: | Re: Rotax E-Learning video on detonation and pre-ignition |
Hi Roger
Thx. for the reply.
I purchased one from Bing (same one Eastwood sells). My idea is to test one cylinder
at a time by running the sample tube inside the cockpit (through one of
my Ultimate ventilators) to the tester which will be inside the cockpit. I will
have a valve on it where it will be filling cockpit with carbon monoxide for
only a very short time (of course ground testing only).
I don't like lean too much when making serious horsepower. As a matter of fact
I am going to taint my mixtures above 65% a slight bit on the rich side as confirmed
by this Carbon Monoxide tester and my Split Second O2 sender and display.
I am incorporating the ability to lean by allowing the tube going from the
airbox which is at airbox pressure to the carb float bowls to leak via a needle
valve to the balance tube. The "hand in the breeze" higher pressure portion
of the airbox that feeds the rich side of the enrichment solenoid will not be
effected at all. As a matter of fact I am incorporating an emergency "rich" switch
that will allow me to energize the enrichment solenoid anytime I like. There
will be a LED that will show when the solenoid is energized, which is also
nice to know when the TCU is supposed to be doing the energizing over 108% power.
If for any reason my circuit failed for some reason, things are running lean
for some reason or things are starting to run hot, I will energize the enrichment
solenoid. I am installing a diode to protect the TCU from back feeding
from my overriding power just in case there is something in the TCU that wouldn't
like too much to be back fed.
Anyway plan is to use two UMA EGTs, a UMA fuel flow gauge (two Flowscan 201Bs and
a Matronics box to subtract return flow) and Split Second O2 gauge to help
me finda proper proper mixture from slight rich at 75% or less. I will have ability
to run slight rich if things are a bit hot. Over 75% power I will err a
bit rich side and over 100% or 115% near max. rich of what Rotax has to say.
Ron Parigoris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=322899#322899
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