DashDyno SPD 535d Dyno Plot

M5 TT · 08-24-2009, 04:50 PM

link not working?

milesr3 · 08-25-2009, 04:04 AM

Have just driven 120miles from home to the airport this morning and the Intake Air Temperature was no more than 2-8C warmer than the 13C ambient. This must be measuring the intake air temp (as it says) somewhere around the airbox or MAF.

I got an email back from Auterra support this morning stating that a lot of additional parameters, like charge temp and catalyst temp were added to the OBD spec in '07, so they won't be available from my '05 car unless I get a CIP software update I guess.

M5 TT · 08-25-2009, 06:38 AM

Yeah I can only get the same as you. My car had latest CIP Sept 2008

F104 · 08-27-2009, 04:53 PM

Don't know what's going on - i lost IAT & don't know what i saw in the past

My car has been evolve'd this week and goes beyond believe in 3rd/4th gear accelerations. In addition my efficient dynamics alternator control started working again. On the dashdyno (line plot) i can now see it works as advertised- it hasn't at all in the last 12 month or so. Fuel economy is up by 10% - wow.

IAT is gone though. I now get the same as you guys, 2-3 degrees over ambient no matter what I do. I disconnected the temp sensor on the pipe from intercooler to engine, and still get the same readings! I'm baffled as to what i read in the past, and what I see now. I can only find 3 sensors: boost on the inlet manifold, temp (the one i disconnected), and MAF after the airfilter. I can still read MAF and MAP with the disconnected temp. sensor. Anyone knows how this works? Does a MAF provide temperature signal too?

Following the remap I wanted to see how improved airflow thru the intercooler affects IAT. I'm now driving for 300+mls without fan and fanshroud (the whole thing is in trunk in case i get a high coolant alarm - 2 minute job to put it back..) without issues. Coolant runs at peaks 2-3F higher, that's all. The fan shroud blocks like 50% of free flow thru the intercooler core (on E92 320d). But now i don't have IAT I can't measure/plot this. What is the OBD air intake temp reading??

08-24-2009, 04:50 PM	#23
M5 TT Captain 179 Rep 657 Posts Drives: F90 M5 Join Date: Sep 2008 Location: UK iTrader: (0)	link not working? __________________ 540i GTR-R35, F90 M5, X3MC, RS3, RS7, M5, S7, S3, RS3, RS6, GTR R35, 996 Turbo, M5, RS6 V10, Cayenne Turbo S
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08-25-2009, 04:04 AM	#24
milesr3 Private First Class 10 Rep 193 Posts Drives: 535d SE Join Date: May 2009 Location: Suffolk, UK. iTrader: (0)	Have just driven 120miles from home to the airport this morning and the Intake Air Temperature was no more than 2-8C warmer than the 13C ambient. This must be measuring the intake air temp (as it says) somewhere around the airbox or MAF. I got an email back from Auterra support this morning stating that a lot of additional parameters, like charge temp and catalyst temp were added to the OBD spec in '07, so they won't be available from my '05 car unless I get a CIP software update I guess.
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08-25-2009, 06:38 AM	#25
M5 TT Captain 179 Rep 657 Posts Drives: F90 M5 Join Date: Sep 2008 Location: UK iTrader: (0)	Yeah I can only get the same as you. My car had latest CIP Sept 2008 __________________ 540i GTR-R35, F90 M5, X3MC, RS3, RS7, M5, S7, S3, RS3, RS6, GTR R35, 996 Turbo, M5, RS6 V10, Cayenne Turbo S
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08-27-2009, 04:53 PM	#26
F104 Captain 19 Rep 732 Posts Drives: E92 320D M-sport Join Date: Apr 2008 Location: belgium iTrader: (0)	Don't know what's going on - i lost IAT & don't know what i saw in the past My car has been evolve'd this week and goes beyond believe in 3rd/4th gear accelerations. In addition my efficient dynamics alternator control started working again. On the dashdyno (line plot) i can now see it works as advertised- it hasn't at all in the last 12 month or so. Fuel economy is up by 10% - wow. IAT is gone though. I now get the same as you guys, 2-3 degrees over ambient no matter what I do. I disconnected the temp sensor on the pipe from intercooler to engine, and still get the same readings! I'm baffled as to what i read in the past, and what I see now. I can only find 3 sensors: boost on the inlet manifold, temp (the one i disconnected), and MAF after the airfilter. I can still read MAF and MAP with the disconnected temp. sensor. Anyone knows how this works? Does a MAF provide temperature signal too? Following the remap I wanted to see how improved airflow thru the intercooler affects IAT. I'm now driving for 300+mls without fan and fanshroud (the whole thing is in trunk in case i get a high coolant alarm - 2 minute job to put it back..) without issues. Coolant runs at peaks 2-3F higher, that's all. The fan shroud blocks like 50% of free flow thru the intercooler core (on E92 320d). But now i don't have IAT I can't measure/plot this. What is the OBD air intake temp reading??
	Appreciate 0 Quote