Patch how-to: manifold air temperature logging
#201
Could be due to sensor placement. Mine is in the UICP. Yours is in the IM.
#207
Evolved Member
iTrader: (2)
My observations go along with mrfred, but I as well have my sensor in the UICP.
I would think that the temp in the UICP would be a better representation of true temps because if the IM is heat soaked, it will create a boundary layer of air that is artificially higher in temperature than the rest of the air in the volume of the IM. For example, if you graphed the temp of air right at the interface of the IM metal to the center of the IM, it would start higer, then curve down to the actual temp.
So, what tephra is seeing may be the misrepresentation of the true intake temps due to the sensor reading this heatsoaked layer. That's just my opinion.
I would think that the temp in the UICP would be a better representation of true temps because if the IM is heat soaked, it will create a boundary layer of air that is artificially higher in temperature than the rest of the air in the volume of the IM. For example, if you graphed the temp of air right at the interface of the IM metal to the center of the IM, it would start higer, then curve down to the actual temp.
So, what tephra is seeing may be the misrepresentation of the true intake temps due to the sensor reading this heatsoaked layer. That's just my opinion.
Last edited by l2r99gst; Jan 11, 2009 at 06:00 PM.
#208
EvoM Guru
iTrader: (6)
well basically:
UICP: more accurate measurement of post IC airtemp, less prone to HS as UICP is thin and will change temp easier
IM: more accurate measurement of actual temps (ie TB coolant) however much more prone to HS as IM is thick+touching head
if Mikes test of the temp reducer gasket works then I think that would be a go-er.
Mike can you also test blocking off the TB coolant? (Maybe in the US you guys need this, but here in Australia temps RARELY go below 10degC
UICP: more accurate measurement of post IC airtemp, less prone to HS as UICP is thin and will change temp easier
IM: more accurate measurement of actual temps (ie TB coolant) however much more prone to HS as IM is thick+touching head
if Mikes test of the temp reducer gasket works then I think that would be a go-er.
Mike can you also test blocking off the TB coolant? (Maybe in the US you guys need this, but here in Australia temps RARELY go below 10degC