JohnK Posted December 11, 2005 Share Posted December 11, 2005 Does anyone know what effect air speed has on temp sensors. For instance putting a sensor directly in the post IC hose. Link to comment Share on other sites More sharing options...
merckx Posted December 11, 2005 Share Posted December 11, 2005 bump:) Link to comment Share on other sites More sharing options...
TLicense Posted December 11, 2005 Share Posted December 11, 2005 Does anyone know what effect air speed has on temp sensors. For instance putting a sensor directly in the post IC hose. Do you mean like "wind chill"? Link to comment Share on other sites More sharing options...
Todd Posted December 11, 2005 Share Posted December 11, 2005 Do you mean like "wind chill"? http://www.weatherimages.org/graphics/new_windchill.gif This is for body temps but guessing (dangerous) same principle for your measurements? Link to comment Share on other sites More sharing options...
MrRalphMan Posted December 12, 2005 Share Posted December 12, 2005 I don't think wind chill applies to sensors... Wind chill is the lowering of the body’s temperature, sensors don't have this so will not be affected. I seem to remember a demo of this once, only when they wrapped the sensor in a damp cloth did it show the wind chill. Have a look http://observe.arc.nasa.gov/nasa/earth/wind_chill/chill_home.html, I really like the shivering man!!! Paul. Link to comment Share on other sites More sharing options...
merckx Posted December 12, 2005 Share Posted December 12, 2005 Are these temperature sensors any good? Can anyone recommend a good quality one? Link to comment Share on other sites More sharing options...
eyefi Posted December 12, 2005 Share Posted December 12, 2005 Are these temperature sensors any good? Can anyone recommend a good quality one? there already is one on the intake plenum, near the map sensor. Link to comment Share on other sites More sharing options...
merckx Posted December 12, 2005 Share Posted December 12, 2005 there already is one on the intake plenum, near the map sensor. Does this mean a gauge can be used to display an output from the ecu? Link to comment Share on other sites More sharing options...
JohnA Posted December 12, 2005 Share Posted December 12, 2005 windchill is related to sweat evaporation from the skin. It may be the case that your temp sensor doesn't sweat (check with the manufacturer, lol....) Link to comment Share on other sites More sharing options...
Dragonball Posted December 12, 2005 Share Posted December 12, 2005 Have a temp sensor for the I/C - and will be doing our own soon £40.00 Link to comment Share on other sites More sharing options...
JohnK Posted December 12, 2005 Author Share Posted December 12, 2005 Well With a temp sensor in free air in front of the throttle butterfly, I am seeing temps of between 5 and 15 degrees above ambient, but after a run when the engine is off this goes upto around 60c. The sensor has been calibrated in a static enviroment. So whats the concensus of opinion, is it a false reading due to air speed? Link to comment Share on other sites More sharing options...
eyefi Posted December 12, 2005 Share Posted December 12, 2005 Does this mean a gauge can be used to display an output from the ecu? it could if the gauge was calibrated to the sensor. i could tell you what voltage relates to what temp, you could just read it with a multimeter if you didn't want yet another gauge in the car. Link to comment Share on other sites More sharing options...
JohnK Posted December 12, 2005 Author Share Posted December 12, 2005 Im using a stand alone gauge and sensor. Link to comment Share on other sites More sharing options...
eyefi Posted December 12, 2005 Share Posted December 12, 2005 So whats the concensus of opinion, is it a false reading due to air speed? nah, sounds realistic, not too sure what your charged air cooling setup is. Link to comment Share on other sites More sharing options...
JohnA Posted December 12, 2005 Share Posted December 12, 2005 If the sensor is placed *after* a water injection point, then yes, you'd have 'windchill' effect. Otherwise you wouldn't. With the engine off there is no airflow, so it would just show the air temp inside the throttle body --- easily 40C above ambient Link to comment Share on other sites More sharing options...
JohnK Posted December 12, 2005 Author Share Posted December 12, 2005 nah, sounds realistic, not too sure what your charged air cooling setup is. Thats the thing, I have a stock side mount that has seen better days, Im trying to work out if its a problem, by these results it isnt and a FIMC is a waste of money. (waits for traders to spring to the defence of FIMC's) Link to comment Share on other sites More sharing options...
TLicense Posted December 12, 2005 Share Posted December 12, 2005 by these results it isnt and a FIMC is a waste of money. Yup, well I say that.... The benefit of a larger intercooler will be instead of being 5-15 degs above ambient, it may be 2-10 degs or something. Link to comment Share on other sites More sharing options...
eyefi Posted December 12, 2005 Share Posted December 12, 2005 Thats the thing, I have a stock side mount that has seen better days, Im trying to work out if its a problem, by these results it isnt and a FIMC is a waste of money. (waits for traders to spring to the defence of FIMC's) do you get the same results on a hot dry day or a sustained high boost run? Link to comment Share on other sites More sharing options...
JohnK Posted December 12, 2005 Author Share Posted December 12, 2005 Assuming my readings are correct. Link to comment Share on other sites More sharing options...
TLicense Posted December 12, 2005 Share Posted December 12, 2005 do you get the same results on a hot dry day or a sustained high boost run? I imagine my SMIC is probably in much the same state. (Some fins damaged - general abuse from 12 years of driving - no core damage) and my temps remain absolutely solid at 1.1 bar right up to the red line. Link to comment Share on other sites More sharing options...
JohnK Posted December 12, 2005 Author Share Posted December 12, 2005 do you get the same results on a hot dry day or a sustained high boost run? I have just put it in (for a lot less than £40) and we are a running short of hot dry days at the moment. However I was giving it some stick. As you would expect the higher the car speed the cooler the temps. Link to comment Share on other sites More sharing options...
JohnK Posted December 12, 2005 Author Share Posted December 12, 2005 I imagine my SMIC is probably in much the same state. (Some fins damaged - general abuse from 12 years of driving - no core damage) and my temps remain absolutely solid at 1.1 bar right up to the red line. Im running a T61, EGTs rarely go north of 840. Link to comment Share on other sites More sharing options...
TLicense Posted December 12, 2005 Share Posted December 12, 2005 I have just put it in (for a lot less than £40) and we are a running short of hot dry days at the moment. However I was giving it some stick. As you would expect the higher the car speed the cooler the temps. Mine remained absolutely steady as a rock, no gain or loss. Perhaps that's a sign of my poorly IC, perhaps it should drop as I'm going quicker. Link to comment Share on other sites More sharing options...
TLicense Posted December 12, 2005 Share Posted December 12, 2005 Im running a T61, EGTs rarely go north of 840. Sounds pucka dink to me then mate. An inlet temp reduction of 1 degree will approximately equal a reduction of 1 degree in EGT, if all else is well. But with those kind of numbers it sounds pretty sound. Link to comment Share on other sites More sharing options...
TLicense Posted December 12, 2005 Share Posted December 12, 2005 Out of interest what are people generally regarding as the max EGT? I know sub 900 is good. (Hence why 840 degs is good, unless you're going to go somewhere 60 degrees hotter than it is when you did your measurements) Link to comment Share on other sites More sharing options...
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