Thermocouple on 661 - got it working.

[Redbull661]

well this is the first successful run with the thermocouple. It's interesting. Still thinking about it.
How fast it cools with saw off. how fast it cools with saw idling. Rate of heating up. Rate of cooling down. Peak temps. start temps. lol

You guys give me your thoughts (note you'll probably have to watch the video full screen to see the temp #s

36" .404 RS 7pin cross cut

29.9 sec on first cut with a max temp of 446F then 31.5 sec on 2nd cut with max temp of 489F

36" .404 RSLF 8pin noodle

 

[Deets066]

well this is the first successful run with the thermocouple. It's interesting. Still thinking about it.
How fast it cools with saw off. how fast it cools with saw idling. Rate of heating up. Rate of cooling down. Peak temps. start temps. lol

You guys give me your thoughts (note you'll probably have to watch the video full screen to see the temp #s

36" .404 RS 7pin cross cut

29.9 sec on first cut with a max temp of 446F then 31.5 sec on 2nd cut with max temp of 489F

36" .404 RSLF 8pin noodle

Where is the thermal coupler reading from?

 

[Redbull661]

copper washer mount. (you take the crush washer off the spark plug.)


first try was with a probe down into the combustion chamber. @Tbrown rigged up a decomp to accept it. Measured combustion temps which were around 1850F. It was interesting but not what I was wanting to measure really. I wanted to measure Jug temp. So bought a new washer style.

http://thesensorconnection.com/


idea is to be able to measure the jug for changes in temp from various modifications and for the Oil test I want to do. Seems to be working. Thinking next step is to mix up some different oil and gas mixtures and run a small test to see what happens.

 

[Deets066]

I've been thinkin about doin this too. But measuring egt's

 

[jake wells]

i have seen it all now.

 

[Manofstihl066]

Nice bar!

 

[maulhead]

i have seen it all now.

No you haven't, in the next test a 2nd probe will be placed to measure anorectal temps, while testing MM vs TM 661's....

 

[jake wells]

No you haven't, in the next test a 2nd probe will be placed to measure anorectal temps, while testing MM vs TM 661's....

ano who?

 

[Clemsonfor]

Subscribed

Sent from my SM-G900V using Tapatalk

 

[tree monkey]

i have seen it all now.

knowledge, my friend

 

[jake wells]

knowledge, my friend

i have seen many things but i lack knowledge.

 

[CR888]

The laser gun heat thingy can now be given to a man with a clipboard in a restaurant where it belongs testing coolroom food delivery temps.

 

[CR888]

If you had a chainsaw dyno (easy peasy huh!) along with the thermocouple, that would be one hell of a tuning centre. Working out what temps produce max HP and where HP falls away with increased heat. But even with what you have good knowledge can be gained testing muffler port sizes, screens, jetting, different porting, effects of timing changes and a bunch more.

 

[porsche965]

I've used thermal probes in intercoolers fed by turbochargers. HP is always relative to temperature. An air probe in the muffler would be more instantaneous of temperature change than a thermocouple. Not sure how much but it would be. Reminds me of the pyrometers I had installed in the exhaust manifolds of the Mack 575hp Superdogs 20 years ago.

Great information Red Bull.

 

[lwhaples]

Enjoy watching all your testing vids.Cool stuff!

 

[EvilRoySlade]

For testing purposes Julian I would run with both the spark plug and comp release thermocouple to gather data. Document how those two act for a variety of cuts, fast, long, cool down, even oil types/ratio.

Once you've built some data you could switch back to just the spark plug. Porting changes and oil stuff will affect combustion temps some though.

Honestly, I would research snowmobile tech. They've already done what we're trying. Although they have reeds and cooling. I would seriously look into installing a lambda sensor, that info would be huge.

 

[Stihl working Hard]

well this is the first successful run with the thermocouple. It's interesting. Still thinking about it.
How fast it cools with saw off. how fast it cools with saw idling. Rate of heating up. Rate of cooling down. Peak temps. start temps. lol

You guys give me your thoughts (note you'll probably have to watch the video full screen to see the temp #s

36" .404 RS 7pin cross cut

29.9 sec on first cut with a max temp of 446F then 31.5 sec on 2nd cut with max temp of 489F

36" .404 RSLF 8pin noodle

Great thread as usual @Redbull661 thanks for sharing

 

[Derf]

idea is to be able to measure the jug for changes in temp from various modifications and for the Oil test I want to do...Thinking next step is to mix up some different oil and gas mixtures and run a small test to see what happens.

AWESOME experiment!

 

[EvilRoySlade]

I really like the dyno idea. Build a chain with no cutters, short double ended bar, hydraulic pump on the other end. Pressure gauge in line with a needle style valve to restrict flow. Your flow number really doesn't matter, you just need psi reading. Run some wood cuts with both TT hooked up then do the same hook to pump, play with valve until you get similar RPM and temps. Now you're close. Save on chain sharpening and wood to find. You can always test on wood for real world data.

 

[Deets066]

This has also been done. I wish Chad was still around, I liked his threads