Quote:
Originally Posted by BMWM.D.
I understand that the ECU doesn’t use IAT2 directly, but it is a big part of the manifold air temp calculation as far as I know. But like you mentioned, it’s a good PID to use for diagnostic purposes — which is why I was referencing it in this situation. MAT is what I pay attention to when logging.
That said, does an LT1 even use manifold air temp?
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I believe the LT1 uses manifold air temp which is still a calculated nmber, but I am not 100% sure.
For the LT1 we have to isntall a pigtail harness to run the IAT2 which then reads as IAT1 through the OBDII port to the P3 gauge. This is the temp that is way off on mine.
I spoke with a buddy at GM yesterday and it seems the ZL1 often runs very hot with no worries of temps exceeding 140's-150s.
Can someone provide a log showing that the blower temps are only 10* higher than the ambient outside air? This morning the blower was 100-110 with outside temps of 55* and high humidity(it is misting here in Houston). Once I got into stop and go traffic the temps climbed up to the 130s from lack of air flow.
One other thing that was mentioned was a possible heat shield between the valley cover/heads and the blower. Is this a stock part that I should have under my blower? Is it possible I am seeing higher temps due to heat transfer from the engine?
Thanks everyone for your help here. I am learning on my first supercharged vehicle and every piece of advice is appreciated.