DaveFJ
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| posted on 20/5/08 at 03:56 PM |
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temperature sensor
My post on another thread has got me thinking......
Does the temprature sensor connected to Megasquirt perform any function once the engine reaches operating temp?
reason I ask is that when the engine is warmed up megatune reports a steady 102 degrees regardless of the temp on the water temp gauge which can vary
from 90 - 120 degrees (although I don't know how accurate that is!)
has a look at my calibration figures for the sender and I can see that when you reach 85 degrees C you are only seeing a couple of ohms difference for
a degree change as opposed to 25-30 ohms change around the 35 dgree mark... (if you see what I mean)...
therefore the sender is much less sensitive at normal operating temps
so - back to my question...
Does it matter? once the sender tells MS that the engine has warmed up does it play any other part? or am I safe to ignore it?
to avoid the inevitable question: Yes I have properly calibrated using megatherm and flashed the update to the MS unit and added the files to
megatune....
[Edited on 20-5-08 by DaveFJ]
Dave
"In Support of Help the Heroes" - Always
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turbodisplay
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| posted on 20/5/08 at 08:31 PM |
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The sensor is non linear hence the difference in sensitivity.
Once the engine is considered warm there is very little info required, on to of the range ecu i think timing is adjusted, fuel remains the same.
Some OE ECUs actally change the driving resistor for the sensor at a cetain temp to make the output more linear.
Darren
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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darrens
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| posted on 20/5/08 at 09:55 PM |
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controls my rad fan
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