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Tim Olson
Joined: 25 Jan 2007
Posts: 2881
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 Posted: Mon Jun 07, 2010 5:23 am Post subject: EGT probes |
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Following up on this....
This weekend I had my first real hard EGT probe failure. It went
from working fine to reading 70-90 degrees, while all other
engine parameters and temps were normal. So it looks like I
finally failed an EGT probe from wear/burnout. I'm at
just over 625 hours, on the black type GRT probes. Now that
I had one go, I'll probably just replace the whole set of 6,
and keep the other 5 for spares or swap-in testing/troubleshooting.
Out of curiosity David, what did you find for the difference
in price between the EI probes, and the GRT white colored
better quality probes?
Tim Olson - RV-10 N104CD
do not archive
DLM wrote:
[quote] I talked to Sandy and the very low reading indicates it is open and
reading the temp of the internal EIS. My number two was like that and
when removed was burn off to 3/8" I sent the list a picture recently. I
am going to buy a set of EI quick response probes. I have been assured
that they will work in place of the GRT probes (we will see). Got a good
quote.
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dlm46007(at)cox.net
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| Posted: Mon Jun 07, 2010 6:27 am Post subject: EGT probes |
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The GRT probes $45 and $36; The EI probes were $70; total was $433 including
shipping. These ae the fine point probes and are the small diameter probes;
the list for $104. I called and talked to Matt at EI. These are fast
response P-110.
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Tim Olson
Joined: 25 Jan 2007
Posts: 2881
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| Posted: Mon Jun 07, 2010 7:08 am Post subject: EGT probes |
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I'm not sure if I'd want to go smaller if they're much smaller in
diameter though.....additional exhaust leakage could erode the hole,
at least unless you can get a tight seal even though they're
skinnier. My original GRT probes were plenty fast in response for
me....but that does bring up the issue of I need to also find out if
the "better" GRT probes are the same diameter an response. The old
probes served me real well except I'd have hoped for 1,000 hours or so
on the lifetime. Not sure what's practical....I've never flown a
plane over 625 hours before, so I don't know what expected lifetime is.
Tim
On Jun 7, 2010, at 9:14 AM, "DLM" <dlm46007(at)cox.net> wrote:
[quote]
The GRT probes $45 and $36; The EI probes were $70; total was $433
including shipping. These ae the fine point probes and are the small
diameter probes; the list for $104. I called and talked to Matt at
EI. These are fast response P-110.
---
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dlm46007(at)cox.net
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| Posted: Mon Jun 07, 2010 7:41 am Post subject: EGT probes |
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The probes are the same size as the GRT; that is why a chose them ; i would
not need to redrill the holes.
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Tim Olson
Joined: 25 Jan 2007
Posts: 2881
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| Posted: Mon Jun 07, 2010 7:59 am Post subject: EGT probes |
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Cool. I'll look into both then. My old plane had EI probes and they
were plenty fast and accurate too. If they both work great, I'd
gladly pay more for ones that will last a long time. At least these
gave me >25% of TBO. At 50% I probably wouldn't blink.
Tim
On Jun 7, 2010, at 10:35 AM, "DLM" <dlm46007(at)cox.net> wrote:
[quote]
The probes are the same size as the GRT; that is why a chose them ;
i would not need to redrill the holes.
---
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Bob Turner
Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA
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| Posted: Mon Jun 07, 2010 9:32 am Post subject: Re: EGT probes |
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Just as a baseline:
We had the original GEM (slow) probes in a 182 and after 1500+ hours no probes had yet failed. However, I think "fast" probes are thinner and will give less service life than "slow" probes.
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_________________
Bob Turner
RV-10 QB |
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