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Author Topic: Exhaust Temperture  (Read 695 times)

Offline Gary Anderson

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Exhaust Temperture
« on: February 16, 2008, 06:50:12 PM »
Hi Randy, help a old guy out. I forgot what exhaust temp. from most 60 size engine.  I believe its around 200 to 250 degrees? Don't get old, can't remember anything. I'm just playing around with different exhaust system, lost my temp gauge. I wanted to test temp at engine and then test at the end of exhaust system. Just was interested how many degrees is lost from engine to end of muffler. I'm always doing something stupid, I have different mufflers and testing to see the different power of the engine on the different muffler set up's. I have a digital fish scale, going to see if there is a different pull bye using different exhaust systems. Just having fun, appreciate any input, thank you, Gary
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Offline Russell Shaffer

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Re: Exhaust Temperture
« Reply #1 on: February 16, 2008, 08:04:55 PM »
If you are talking Fahrenheit,   that has to be low.  I melted solder on a home made manifold this summer on a bench run.  Lead melts at way over 200. 
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Russell Shaffer
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Just North of the California border

Offline Gary Anderson

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Re: Exhaust Temperture
« Reply #2 on: February 16, 2008, 08:46:04 PM »
Quote from: Russell Shaffer on February 16, 2008, 08:04:55 PM
If you are talking Fahrenheit,   that has to be low.  I melted solder on a home made manifold this summer on a bench run.  Lead melts at way over 200. 
Hi Russell, wow you must be running very hot. I use 95/5 solder and can put it in the exhaust stream and it does nothing. Melting point is 450 degrees Fahrenheits. and I make all my mufflers with this solder. Was the set up for a pipe type system? Does a pipe system run hotter than a regular type? What size motor did you melt the solder with? You're correct I believe water at sea level boils at 212 degrees. If you spray water on the head of a hot engine it seems to boil. Thank you for your input, Gary
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Offline Russell Shaffer

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Re: Exhaust Temperture
« Reply #3 on: February 17, 2008, 07:54:49 AM »
It was an Enya 19.  I made a manifold from a brass strip and a copper elbow.  So it was attached directly to the exhaust port.  The elbow fell off after 2 or 3 minutes. 
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Russell Shaffer
Klamath Falls, Oregon
Just North of the California border

Alan Hahn

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Re: Exhaust Temperture
« Reply #4 on: February 17, 2008, 10:27:06 AM »
I am guessing the differences may be in how the engine is running. If it is 4 stroking or a rich 2 stroke, I bet the solder will hold (lots of fluid coming out the exhaust port), but if in a strong or lean 2 stroke, it might be pretty hot.

Of course if you get a lean run...... Better plan for that!
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Offline RandySmith

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Re: Exhaust Temperture
« Reply #5 on: February 17, 2008, 11:44:46 AM »
Quote from: Gary Anderson on February 16, 2008, 06:50:12 PM
Hi Randy, help a old guy out. I forgot what exhaust temp. from most 60 size engine.  I believe its around 200 to 250 degrees? Don't get old, can't remember anything. I'm just playing around with different exhaust system, lost my temp gauge. I wanted to test temp at engine and then test at the end of exhaust system. Just was interested how many degrees is lost from engine to end of muffler. I'm always doing something stupid, I have different mufflers and testing to see the different power of the engine on the different muffler set up's. I have a digital fish scale, going to see if there is a different pull bye using different exhaust systems. Just having fun, appreciate any input, thank you, Gary

Hi Gary

That will  vary a large amount,mostly depending on how lean or rich you are running, EGT  can run 500 degrees at the header / motor, and down to less than 200 degrees at the back of the pipe. This was just an example.Most All exhaust system will have different  temp reading.
Some 4 cycles will hit over 1000  degrees.
The only way to know for sure is to use a meter  such as the laser temperature   guns. I sell 2 of these at reasonable prices, and they are commonly availible at many places

Randy
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Offline Jim Oliver

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Re: Exhaust Temperture
« Reply #6 on: February 17, 2008, 02:23:03 PM »
During my time in the RC Pattern Wars, one of the guys had an EGT probe in the exhaust of his 1.20 4 stroke.  He said the mix was right when the EGT was ~1300*F. 

Sounds hot, but is in the range of full size airplane piston engine exhaust systems.  The actual reading is very dependent on the exact location of the probe in the exhaust stream.

Fun stuff!!

Jim
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Offline RandySmith

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Re: Exhaust Temperture
« Reply #7 on: February 17, 2008, 03:05:42 PM »
Quote from: Jim Oliver on February 17, 2008, 02:23:03 PM
During my time in the RC Pattern Wars, one of the guys had an EGT probe in the exhaust of his 1.20 4 stroke.  He said the mix was right when the EGT was ~1300*F. 

Sounds hot, but is in the range of full size airplane piston engine exhaust systems.  The actual reading is very dependent on the exact location of the probe in the exhaust stream.

Fun stuff!!

Jim

Hi Jim

You are correct, a lot of guys were melting aftermarket aluminum  mufflers  off of their 4 strokes several years  back, this requires temps  above 1100  degrees, much much hotter  than the 2 strokes

Randy
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