Hello!

I've installed the Trailtech Vapor on my Gs500. Its working quite good, but one concern i have is the temperature.
Today, driving to work, it reached 123 C (maybe itll do even more if i go further.)

The measurement is done with a spark plug ring. What's the temperature im supposed to get? is 123 C dangerous? 90 C is usually the operating temperature of an engine.

Short answer....you're fine with that temp.

Long answer:

When we talk "engine operating temperature"...well there are several temperature items we are concerned with...and they all have different "normal" readings, and different "red lines".

Oil temperature
Water Temperature (not on aircooled engine)
Cylinder Head temp
Exhaust gas temperature

(could be others)

Oil temp varies as to where the reading is taken in the system....internal oil temps should go above boiling point of water...but usually where probes are installed is in cooler place so just below boiling for water is good...too cool of oil means water stays in engine = corrosion

Water temp goes right around water boiling too...due to pressure system, it does not boil....but less than boiling point is also good...


Cylinder head temp is MUCH higher......125C seems fine, to low IMHO....I don't know specs for GS500....But for my airplane redline is 425 F=218 C


Exhaust gas temperatures go really high...used in airplanes to adjust fuel air mixture..

Quote from: Krav on September 15, 2014, 01:27:39 AM
Hello!

I've installed the Trailtech Vapor on my Gs500. Its working quite good, but one concern i have is the temperature.
Today, driving to work, it reached 123 C (maybe itll do even more if i go further.)

The measurement is done with a spark plug ring. What's the temperature im supposed to get? is 123 C dangerous? 90 C is usually the operating temperature of an engine.

Okay, okay. Right now i have my High sensor set to 175C and my danger to 200C Thats about safe then, i guess?

If i were to connect the sensor to the exaust though, would i be able to read the temp, and see when running lean for example? That would be a great idea! Is that doable you reckon?

Quote from: twocool on September 15, 2014, 04:07:46 AM
Short answer....you're fine with that temp.

Long answer:

When we talk "engine operating temperature"...well there are several temperature items we are concerned with...and they all have different "normal" readings, and different "red lines".

Oil temperature
Water Temperature (not on aircooled engine)
Cylinder Head temp
Exhaust gas temperature

(could be others)

Oil temp varies as to where the reading is taken in the system....internal oil temps should go above boiling point of water...but usually where probes are installed is in cooler place so just below boiling for water is good...too cool of oil means water stays in engine = corrosion

Water temp goes right around water boiling too...due to pressure system, it does not boil....but less than boiling point is also good...


Cylinder head temp is MUCH higher......125C seems fine, to low IMHO....I don't know specs for GS500....But for my airplane redline is 425 F=218 C


Exhaust gas temperatures go really high...used in airplanes to adjust fuel air mixture..

Quote from: Krav on September 15, 2014, 01:27:39 AM
Hello!

I've installed the Trailtech Vapor on my Gs500. Its working quite good, but one concern i have is the temperature.
Today, driving to work, it reached 123 C (maybe itll do even more if i go further.)

The measurement is done with a spark plug ring. What's the temperature im supposed to get? is 123 C dangerous? 90 C is usually the operating temperature of an engine.

Krav, I think anywhere you put a temp sensor will just need monitored for an average reading. See what it averages cruising around town, highway temps, stuck in traffic, etc, and making note of whether it is raining outside and other variables. Riding on the hottest days of summer will give you higher readings than a chilly autumn morning.

Aye, thats true. in the end, maybe only time will tell :p

But right now, i wanted to set a warning light for high, and Danger on my Trailtech Vapor.
With the (apperently wrong) knowledge i had, i set it up for 100 and 120 C because i thought it should be running 90 in optimal working temp.

Now that i see that i was wrong there, i would like to know, what is about right Ill just monitor the temps myself for a bit i guess

Do not try to use a cylinder head temp probe to measure exhaust gas temp...there should be a different specialized probe for that , as the temp range is way  different / higher for exhaust gas...like 1500 F.

Exhaust gas temp could be used for analysis of mixture...but really not too useful in GS500 application...in airplanes the mixture can be controlled and varied by the pilot..needed due to operations at high altitudes..you must lean the mixture as you go higher ....


Cookie

Quote from: Krav on September 15, 2014, 04:33:13 AM
Okay, okay. Right now i have my High sensor set to 175C and my danger to 200C Thats about safe then, i guess?

If i were to connect the sensor to the exaust though, would i be able to read the temp, and see when running lean for example? That would be a great idea! Is that doable you reckon?

Quote from: twocool on September 15, 2014, 04:07:46 AM
Short answer....you're fine with that temp.

Long answer:

When we talk "engine operating temperature"...well there are several temperature items we are concerned with...and they all have different "normal" readings, and different "red lines".

Oil temperature
Water Temperature (not on aircooled engine)
Cylinder Head temp
Exhaust gas temperature

(could be others)

Oil temp varies as to where the reading is taken in the system....internal oil temps should go above boiling point of water...but usually where probes are installed is in cooler place so just below boiling for water is good...too cool of oil means water stays in engine = corrosion

Water temp goes right around water boiling too...due to pressure system, it does not boil....but less than boiling point is also good...


Cylinder head temp is MUCH higher......125C seems fine, to low IMHO....I don't know specs for GS500....But for my airplane redline is 425 F=218 C


Exhaust gas temperatures go really high...used in airplanes to adjust fuel air mixture..

Quote from: Krav on September 15, 2014, 01:27:39 AM
Hello!

I've installed the Trailtech Vapor on my Gs500. Its working quite good, but one concern i have is the temperature.
Today, driving to work, it reached 123 C (maybe itll do even more if i go further.)

The measurement is done with a spark plug ring. What's the temperature im supposed to get? is 123 C dangerous? 90 C is usually the operating temperature of an engine.

Quote from: Krav on September 15, 2014, 04:33:13 AM
Okay, okay. Right now i have my High sensor set to 175C and my danger to 200C Thats about safe then, i guess?

If i were to connect the sensor to the exaust though, would i be able to read the temp, and see when running lean for example? That would be a great idea! Is that doable you reckon?

[/quote]

Just read this and thought of something. Krav, if you are concerned with running lean, look at the first post in this thread:

http://www.dotheton.com/forum/index.php?topic=60728.msg688798#msg688798

I know it's not a GS500, but the concept is the same. He used an oxygen sensor to determine when he was running lean / rich. Might not be of any use to you, but more knowledge never hurt anybody.....

I was thinking about installing one of those before, but as far as i can see, i have to drill into m exhaust then. Maybe twice even! Not something i want to be doing (or i'd have to weld it at work). Next to that, an A/F sensor kit all inclusive is Expensive! DAYUM I cant bear the cost for one right now.

But ill keep it in the back of my head.

Did a little touring yesterday, and i got up to an average of 135 C

The gs500 really does not need to be heavily instrumented...it has the "idiot light" for oil pressure...
What more do you need?   They typically run trouble free for many miles........

With instruments you will needlessly drive yourself batty watching the needles move one or two notches.

Cookie

Quote from: Krav on September 16, 2014, 12:43:02 AM
I was thinking about installing one of those before, but as far as i can see, i have to drill into m exhaust then. Maybe twice even! Not something i want to be doing (or i'd have to weld it at work). Next to that, an A/F sensor kit all inclusive is Expensive! DAYUM I cant bear the cost for one right now.

But ill keep it in the back of my head.

Did a little touring yesterday, and i got up to an average of 135 C

Well, i would like some assistence with tuning my carbs though. Knowing at what throttle position its running rich/lean at would save me a lot of fiddling and time. im quite sure its not running optimal with main jet, Needle and air screw :p I miss some top end power, have a massive deadspot at half gas, and its not very nervous at the low end of the throttle.

If only the airscrew wastn on the bottom of the carbs its hard to reach now, and i have to take off the carbs to adjust it, then reassemble the whole thing, see how it runs. Not really an option in my mind.

Wow...you've got problems!   I think Buddha is your only hope at this point!


How come everybody gets into such problems?   I just turned 44,000 miles without an issue at all!

Then again, I don't mess with stuff which already works fine..(jets, exhaust, air filers etc)


Cookie

Quote from: Krav on September 16, 2014, 04:31:14 AM
Well, i would like some assistence with tuning my carbs though. Knowing at what throttle position its running rich/lean at would save me a lot of fiddling and time. im quite sure its not running optimal with main jet, Needle and air screw :p I miss some top end power, have a massive deadspot at half gas, and its not very nervous at the low end of the throttle.

If only the airscrew wastn on the bottom of the carbs its hard to reach now, and i have to take off the carbs to adjust it, then reassemble the whole thing, see how it runs. Not really an option in my mind.

I do mess with stuff :p I did install some podfilters.
I knew i had to tune the carbs, and im used to be having to tune the carbs on my mopeds, scooters and stuff. The easy thing there is that you can usually adjust mainjets, pilot screws and stuff like that in a second. Now i have 2 carbs, and i need to remove the tank and carbs to do a little adjustment. then put everything back, and drive for a bit again. Its hardly doable :p if i had a rolling road, that would be MUCH of a help. But since i dont, ill have to leave it at this i guess.