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I really lost myself this weekend

 
  #381  
Old 02-12-2019, 10:57 AM
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What would cause the temperature to teach beyond what is considered normal?
 
  #382  
Old 02-12-2019, 11:09 AM
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not moving in very hot temps might make it overheat.
 
  #383  
Old 02-12-2019, 11:09 AM
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Originally Posted by splattttttt View Post
What would cause the temperature to teach beyond what is considered normal?
timing incorrect
jetting/afr incorrect, intake leak
sumping
constant lugging
too long in the burnout pit
 
  #384  
Old 02-12-2019, 12:45 PM
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Okay, thanks!
So would it be safe to assume that if the head temps reach a critical temperature reading., that the engine oil temps would reflect that?
I’m sure the answer is yes.
And for that reason, I have to ask that if oil gemps are high, then it would be safe to assume temps at the head would also be high?
Again, I would expect this answer to be a yes too.
So then why go through the trouble of checking head temps when a simple analog oil tank cap would do the same?
 
  #385  
Old 02-12-2019, 12:51 PM
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Originally Posted by splattttttt View Post
Okay, thanks!
So would it be safe to assume that if the head temps reach a critical temperature reading., that the engine oil temps would reflect that?
Iím sure the answer is yes.
And for that reason, I have to ask that if oil gemps are high, then it would be safe to assume temps at the head would also be high?
Again, I would expect this answer to be a yes too.
So then why go through the trouble of checking head temps when a simple analog oil tank cap would do the same?
I would think head temps can run quite a bit higher than oil temp.
 
  #386  
Old 02-12-2019, 02:33 PM
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Correct on that Chef.
470*on heads vs. 225* for the oil bag
But do each of these two temperature readings tell different stories? Or will one Reqding be enough to go by to determine an issue that is driving up the temp.
 
  #387  
Old 02-12-2019, 04:25 PM
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Originally Posted by splattttttt View Post
Correct on that Chef.
470*on heads vs. 225* for the oil bag
But do each of these two temperature readings tell different stories? Or will one Reqding be enough to go by to determine an issue that is driving up the temp.
Haven't read through the thread or what is trying to be accomplished - ( I just dropped by because I hadn't heard from Schex in a while ). If specifically looking at temp to reduce wear - lube breakdown - warpege - tuning to reduce temp for a reason unknown to me IDK. I know Schex is a wrench/Tech by profession, so there is value to tracking the specific area temp. I'm just a guy who likes EVOs because they sound good and are almost bullet-proof.
 
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  #388  
Old 02-12-2019, 05:19 PM
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Matt briught up a very good subject regarding heat. Seens as though there may be a lot to learn how to best measure it. Many here use different methods. Is there a best ine? And what will knowing how hot things get... Why does it matter? And we know it does. Heat is bad. Bad I tell ya!
 
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  #389  
Old 02-12-2019, 08:33 PM
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The best way to sense combustion chamber temperature is a probe right in the chamber. Since that's not very feasible, nor would it give accurate temps with is extreme fluctuation between combustion stroke and intake stroke, the common methods of temp sensing are EGT and cylinder head. I've go the EGT port in the exhaust 3" away from the head, and now I've got the spark plug thermocouples under the spark plugs. I've read that under the spark plugs is the best place to sense head temps since it's hottest right there.

If you look at engines in more critical applications, like small aircraft, EGT and cylinder head temp gauges (read under spark plugs) are common instruments in the cockpit.
 
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Old 02-12-2019, 08:35 PM
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Originally Posted by LQQK_OUT View Post
If one wanted to read head temperature, couldn't I just use an infrared laser thermometer? It doesn't have logging capability, but at least I don't have two unsightly wires on my engine. Plus I now have the ability to measure other points on my motorcycle, like exhaust, electrical circuits, etc.

https://www.harborfreight.com/121-in...ter-63985.html
Go up about 10 posts from yours to see why that's not accurate enough for my needs.

I have one of those, I use it to measure oil temps for frying fish.
 

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