Quote:
Originally Posted by Mag
yes the cylinder head gases are routed to the throttle body location. But these temps must be in the 100C's. (more reason to install a vent to atmosphere oil catch tank)
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Yes, and I think some of that heat soaks the area around the throttle body, perhaps even the airbox (making it an interheater, I guess).
Quote:
Originally Posted by Mag
The MAF is before the TB, on the airbox, so is that to say the TMAF is not located behind the throttle body then? If not, then this temp sensor should be getting hit with only ambient air. I'd think the ecu would want to take IAT temp post SC because this is the charge right before combustion, so seems counterintuitive. hmmm...
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I would have thought that it would be useful to measure the temp of the charge after the IC too.
Maybe it has something to do with the evolution of the ECU; the N/A version of the car only needs the temp and flow from the TMAF at the airbox.
Quote:
Originally Posted by Mag
on your graph, whats the yellow temp? if it's downstream and it's not the "TMAP IAT" location on the exit side of IC, did you put a probe here?
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The yellow temp is cooling air from the roof duct after it's passed through the IC. The sensor I used to measure cooling air flow through the IC has a thermocouple and pressure sensor too, so I was able to take all that data at the same time.
Quote:
Originally Posted by Mag
nice job on plotting the graph, thanks for doing that.
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You're welcome, and thanks for the data
Quote:
Originally Posted by Mag
Oh... note checked multiple times with an infrared gun pointed at IAT location (at idle), and it matches the IAT reading. But this could just be a coincidence.
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Yes, at idle the SC is bypassed, so the air coming in from the airbox is not compressed, and should be roughly the same temp post IC.