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Old 12-02-2002, 09:02 PM   #1
Tobey
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Default autometer egt gauges, what egt probe are you using?

just called summit and they couldn't give me a definate answer on which one to buy. just did a search with little luck, any ideas? i'm guessing the 5249 kit will work, but i can't see a picture of it anywhere on autometers website.

from the pics of their other probe kits, it doesn't look like these screw in? maybe it's the pcitures or i'm not seeing it, but i'm lost.

any help would be greatly appreciated.............
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Old 12-02-2002, 09:14 PM   #2
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I got the 5249 kit and it is the screw in type. you will have to tap the manifold with an 1/8" npt tap for it to fit. here's the pic from summit
Not exactly the same as the one you get but it's pretty close. BTW I have heard the Westach probe reacts a bit faster but mine seems to work well enough for what i use it for. good luck-James
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Old 12-02-2002, 11:37 PM   #3
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that's great info, thanks!!
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Old 12-02-2002, 11:48 PM   #4
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Quote:
Originally posted by jjunior887
BTW I have heard the Westach probe reacts a bit faster but mine seems to work well enough for what i use it for. good luck-James
I've heard the exact opposite. The sheilded tip on the westach probes should be more durable. They do make an exposed tip part, but they didn't reccomend it when I talked to them, said it wouldn't last long.
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Old 12-03-2002, 12:42 PM   #5
Tobey
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last question on that 5249, do i need a sendor or does that probe wire into the gauge itself? i just want to make sure i order everything at once!

thanks for the info~
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Old 12-03-2002, 02:09 PM   #6
D_REX
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Quote:
Originally posted by Tobey
last question on that 5249, do i need a sendor or does that probe wire into the gauge itself? i just want to make sure i order everything at once!

thanks for the info~
The gauge should come with everything you need to interface to the probe.
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Old 12-03-2002, 06:55 PM   #7
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Quote:
Originally posted by D_REX


The gauge should come with everything you need to interface to the probe.
What he said. Glad i ended up with the autometer probe, I never heard a bad thing about Westach until you said something. Makes sense though. Thanks-James
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Old 12-03-2002, 08:05 PM   #8
Tobey
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i have had autometer in the pats and they were always good to me about fixing something, and their customer service rocks. i think the autometer would be better to use just because it is meant to work with their gauge. however having never seen either the guage or the probe, the other may work just fine.

anyway, i do thank you guys for the insight, it's much appreciated!
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Old 12-03-2002, 11:13 PM   #9
Wombat North
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Tobey
Got this from Autometer last year.

Thank you for your further inquiry. The 4365 is a competition gauge
set-up and thus is designed with higher accuracy and response time than
the 4344 which is designed more as an entry-level kit for a more
every-day type of use where durability is more of an issue than response
time. The following information is part of a write up by one of our
engineers regarding EGT's and specifically the differences in the
various types of thermocouples that we have available:

"When choosing EGT probes, one needs to consider the tradeoff between
longevity and response time. Auto Meter's 4365 uses standard type-K
thermocouple probes of which four types are available.


1) Model 5249 Severe Duty Closed Tip Probe for use with a Weld-in-Bung

This probe offers the most longevity for severe applications.
It has the slowest response time but is recommended when longevity needs
to be maximized in severe applications that employ turbo or super
charging, nitrous oxide or diesel fuel with water injection.

2) Model 5244 Standard Duty Open Tip Probe for use with a Weld-In-Bung

This probe inherently has the quickest response time of all available
type-K probes, as the junction is isolated and openly extended beyond
the probe's body.
It is not possible to make a response time faster than this probe offers
unless you decrease the overall mass of the weld point. This in turn
would drop the reliability under high temperatures.

Use this probe in Gasoline or Alcohol applications where a quick
response time is desired.

3) Model 5243 Severe Duty Open Tip Probe for use with Weld-In-Bung

This probe is also quick to respond but offers improved reliability by
retracting the junction to a point just above the probes body for more
severe applications.

Use this probe for all severe applications that demand a quicker
response time. Although it is compatible with all fuels, open probes
should not be utilized with diesel engines that employ water injection.
This probe is also not recommended for turbo-charged drag racing engines
that retard timing to quickly spool-up the turbo.



4) Model 5247 Standard Duty Open Tip Probe for use with a Clamp-Around
mount

This probe has the same operational characteristics as the 5244 but is
designed for a quick and simple "Street" installation that does not
require welding.



Type-K EGT Operation Primer

If applied correctly, Type-K EGT thermocouples are fairly rugged devices
considering the environment that they are required to operate. They
obtain durability with simplicity. Like any thermocouple, Type-K
thermocouples use two dissimilar metals that are welded together. The
Type-K materials are Nickel-Aluminum and Nickel-Chromium. Any two
dissimilar metals that make contact will form a small thermoelectric
voltage measured in thousandths of volts. The voltage is dependent upon
the temperature of the contact point of the metals. As most things
developed from nature, this voltage is non-linear over temperature. But
assuming the metals remain in contact, the small voltage will always be
there and the voltage values will always be the same for any given
temperature. Thermocouples are self powered devices that convert
temperature to voltage, this makes them attractive for a variety of
applications which measure temperature. The Type-K thermocouple
temperature range is -450F to +2500F. The corresponding voltages
offered are -6.456 mV to 54.856 mV (0.054856 Volts) respectively.
Because the voltage output is so small, amplification is required to
make the signals obtained from the sensors do useful and intelligent
work (ie: record values and trigger outputs). All amplification requires
external power, so expect a connection to your vehicle's power source to
make the system function.

I hope this information proves to be both helpful and inciteful to you
when you make your choices regarding which of our products will be best
for your application.

Thanks!

Kris
Tech/Service
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Old 12-03-2002, 11:20 PM   #10
Wombat North
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BTW
I use the 4365 comp gauge and the 5249 Severe Duty Closed Tip Probe. 2 in fact, 1 in each manifold.

I'm happy with these
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Old 12-04-2002, 02:49 AM   #11
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Hey guys!
I bought the sport-comp egt gauge. it came with a probe. the part number for the kit is 3344. is this probe okay to use? is it still fairly accurate? i was thinking of upgrading later on.
thanks
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Old 01-31-2004, 04:51 PM   #12
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Quote:
Originally posted by scubaracer
Hey guys!
I bought the sport-comp egt gauge. it came with a probe. the part number for the kit is 3344. is this probe okay to use? is it still fairly accurate? i was thinking of upgrading later on.
thanks
According to this thread, you have the 5249 probe

http://forums.nasioc.com/forums/show...highlight=3344

But everytime I'e seen the 3344 sold, the picture shows a clamp-on probe. Does yours clamp on or screw in?
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Old 01-31-2004, 05:45 PM   #13
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I have the 3344 gauge...it comes without a probe as the probe kit is sold seperate to suite the needs of the customer.
I am using the 5249 probe with it and it is a screwed in type.
It is fast acting and has worked trouble free for ~10k miles so far.
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Old 01-31-2004, 06:08 PM   #14
Aaron'sWRX
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http://www.westach.com/products.htm ... I went with a Autometer EGT gauge but didnt trust their probes. I bought a 1/8th NPT Type K probe from Westach. They are about $50 dollars. Westach has been around since the 1940's making products for aircraft, agricultural, and Auto. Check them out.
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Old 07-09-2004, 09:23 PM   #15
cky211
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I just bought a 3 gauge set from a guy here on the board.
My EGT gauge is the 3343 and here is a picture of the probe. The Autometer instructions mention a ceramic washer which I don't have. Where do I get one?

Anybody out there use a probe like this? Any leaks? I would rather weld in a bung myself and have it thread in but I think that would require buying another probe.

-Scott A.


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Old 07-09-2004, 11:19 PM   #16
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Quote:
Originally posted by cky211
I just bought a 3 gauge set from a guy here on the board.
My EGT gauge is the 3343 and here is a picture of the probe. The Autometer instructions mention a ceramic washer which I don't have. Where do I get one?

Anybody out there use a probe like this? Any leaks? I would rather weld in a bung myself and have it thread in but I think that would require buying another probe.

-Scott A.


If it were me, I'd flush the clamp on probe that you have and buy the 5249 kit and use it.

The washer. most likely, is available from Autometer.
They DO have very good customer service, in my experience
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