I am considering installing a Aerospace Logic 6-point CHT gauge to monitor the temps on the O-470R in my C180.

https://www.aircraftspruce.com/catalog/ ... o6chtb.php

Does anyone have any experience with this unit? Looking for any and all feedback.

Do you have EGT installed?

Is this gauge tso'd for certified aircraft? I know, I know, many will argue that these kinds of instruments don't have to be tso'd.....but.....try to convince your mechanic and/or the FSDO of that.

AC Spruce sells a LOT of non certificated stuff, and USUALLY they're pretty clear about what's tso'd and what's not. I'd check with them prior to ordering.

A CHT gauge is not required per FAR 91.205, BUT, it may be a requirement on the aircraft's equipment list or TCDS.

MTV

There is a single point CHT on Cylinder #3. Can any of the 180 gurus here confirm that #3 is the "hot one"?

mtv wrote:Is this gauge tso'd for certified aircraft? I know, I know, many will argue that these kinds of instruments don't have to be tso'd.....but.....try to convince your mechanic and/or the FSDO of that.

AC Spruce sells a LOT of non certificated stuff, and USUALLY they're pretty clear about what's tso'd and what's not. I'd check with them prior to ordering.

A CHT gauge is not required per FAR 91.205, BUT, it may be a requirement on the aircraft's equipment list or TCDS.

MTV

It is TSO'd and meets an SAE spec. "Cylinder head temperature functionality is TSO'd and
meets the temperature accuracy requirements of SAE AS8005 for a Class IIa (+/-1%) instrument."

I was looking at an EI UBG-16 engine analyzer, but realized that I don't need that much info without fuel injection, which enables much more precise management than the old Marvel Schebler.

It actually says Cylinder #1 on the TCDS. That doesn't seem like it would be the hot one. I will find out if this is accurate when I install the six pointer. My FWF is bone stock, except for the 88 inch prop.

I would 337 an engine analyzer.

* CHT
* EGT
* FF
* Carburetor temp

8GCBC wrote:I would 337 an engine analyzer.

* CHT
* EGT
* FF
* Carburetor temp

I will do this eventually. I am mostly concentrating on keeping my setup usable, and doing one big project per year to minimize my down time. My schedule won't allow me to gut and strip the entire airplane and rebuild without taking it out of service for four years, as I tend to dig very deep if I commit to an undertaking like this. I reworked the FWF this winter (need to monitor temps for break in), interior in the fall, Sportsman STOL and wing paint next winter, then the instrument panel the following winter (at which time I will install the full blown engine monitor).

CHT would be quite good. You probably can't run LOP with that carb so EGT is all relative. Monitoring CHT will give you indication of health of all cylinders. Mixture can be richened for cooling as well as cowl flaps if you have them. Who sells it?

Scolopax,

Where is aircraft based? Are you near Bend, OR ?

The unit is from Aircraft Spruce Flightlogic.

The aircraft is based at BDN 8GCBC.

Scolopax wrote:
There is a single point CHT on Cylinder #3. Can any of the 180 gurus here confirm that #3 is the "hot one"?

No expert, but #3 is the "hot one" on my 0-470-R. This was also the case on my old 470-L.

I use the JPI 700 and really like it. Also, have the single point CHT gauge on #1 cylinder, not sure why #1 but thats where it has always been.

Skalywag wrote:

Scolopax wrote:
There is a single point CHT on Cylinder #3. Can any of the 180 gurus here confirm that #3 is the "hot one"?

No expert, but #3 is the "hot one" on my 0-470-R. This was also the case on my old 470-L.

I use the JPI 700 and really like it. Also, have the single point CHT gauge on #1 cylinder, not sure why #1 but thats where it has always been.

This here is on the Type Certificate Data Sheet for the Cessna 180: "The cylinder head temperature probe location is No. 2 cylinder through S/N 18051445, No. 1 cylinder S/N 18051446 through S/N 18052500, No. 3 cylinder S/N 18052501 and up. "

Scolopax wrote:I am considering installing a Aerospace Logic 6-point CHT gauge to monitor the temps on the O-470R in my C180.

https://www.aircraftspruce.com/catalog/ ... o6chtb.php

Does anyone have any experience with this unit? Looking for any and all feedback.

Aerospace Logic make nice gear, I've installed their volt/ammeter on a 206 and the quality was excellent. But that's a lot of $$ if you're going to upgrade later.... Have you looked at the Insight G series?

onefitty wrote:

Scolopax wrote:I am considering installing a Aerospace Logic 6-point CHT gauge to monitor the temps on the O-470R in my C180.

https://www.aircraftspruce.com/catalog/ ... o6chtb.php

Does anyone have any experience with this unit? Looking for any and all feedback.

Aerospace Logic make nice gear, I've installed their volt/ammeter on a 206 and the quality was excellent. But that's a lot of $$ if you're going to upgrade later.... Have you looked at the Insight G series?

The Insight equipment looks nice! Thanks for the recommendation. I will dig a little deeper i to these before making up my mind.

I had an Insight G1 installed in my LRB, Lycoming O-360, last year. It was one of the first, so it's had a few glitches, which Insight has resolved--their customer service is excellent. I like it, because the color changes tell you at a glance what's going on, and it makes for pretty easy leaning. What has surprised me, and which I assume is true of other engines as well, is that which cylinder runs the hottest (CHT or EGT) or which cylinder peaks first varies from time to time. My 2 back cylinders run hotter than the front ones, but otherwise there's quite a variation, depending on altitude, OAT, etc.

Cary

I looked that product line up at AC Spruce. Pretty expensive for just CHT.
As others have said, maybe shop a bit more. If you have to run 6 probe wires through the firewall, might do EGT as well. Not a whole lot more labor in the end. Probes seem to last pretty well.
And the 470 will vary from season to season on temps.

Scolopax,I should be receiving my Insight g2 for our o-470k on Friday. We are still a few weeks out on flying,but I will give you more info as I get acquainted with it. As onefifty said Insight is building a quality product,and for me having six cht-egt-fuel flow-oat-bus voltage and last but certainly not least (carburetor inlet temp) is a great bang for your hard earned buck.

Forgive me if this has been addressed already but,
Is it your intention to replace your current CHT indicator with this one? And if so is this unit certified as a primary instrument? Simply being TSO'd is not an indicator of this. It may or may not matter to you, but if this instrument has not been certified as a primary, and the CHT is on your aircrafts TC, you will still need to leave the original in place.
The JPI 830 which a fantastic unit is an example of this situation .... Now that doesn't mean you couldn't try for a field approval to replace the old gauge with this one, but I'd get it approved before I ante'd up if it were me.

Take care, Rob

The Aerospace Logic and Insight units are are approved on all Cessna 180s as primary CHT gauge.

http://www.aerospacelogic.com/docs/AML%20SA02825NY.pdf

http://www.insightavionics.com/pdf%20fi ... %20STC.pdf

Insight seems like the most bang for the buck, though there's not much to do with the EGT in the 180, the carb temp gauge might come in handy. Thanks for the great info everyone!

I would argue that you still want 6 probe EGT on a O-470. I have seen many induction leaks on the log induction and that would give you lean cyl down stream that would be picked up by the 6 cyl EGT. EGT is also the quickest indication of problems with the engine vs. CHT. $1000 for 6 CHT isnt bad but I didnt see bayonet probes as an option just spark plug. If you fly alot and will be keeping this plane I would go all in and get the newest complete system you can afford. 6 cyl EGT CHT FF Oil T / P . Mine have paid for themselves many times over. I am very interested in the Insight G3 with vibration analysis. If that was an option when I installed mine I would have tried that one. I want spark analysis on a oscilloscope. Flew my turbine yesterday and only had 1 egt no cht.