IAT Temps for PD Blowers

[zaquhree]

This is why I loved the Paxton

Iats 4-10* above ambient traffic or moving
Iats 120-140* on 14lbs after the 1/4

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[Obsol3te]

Impossible.

I can provide video if need be, but i assure you. That's what mine are reading

 

[908ssp]

I can provide video if need be, but i assure you. That's what mine are reading

Then it is wrong. Period end of story impossible to run lower than ambient without ice for more than a few seconds. Pumping air increases heat it is a law of thermodynamics.

 

[Obsol3te]

I have to agree with a conventional air to water Intercooler system your never gonna get ambient temps,except for the first minute. The only way you could see less than ambient is if you have an ice box. Something is wrong with your IAT2 reading.

1. Where is your IAT2 sensor located?
2. What brand is the sensor.
3. What system is used to read it, like PCM or Ngauge?

IAT2 sensor is reading compressed cooled air in the discharge manifold. Sensor us either stock or it was included in my KB kit. And the pcm is reading it through the dash

 

[zaquhree]

Yeah there is absolutely no way that sensor is calibrated. You can not be cooler than ambient with any FI without spraying CO2, adding meth, or some ICE in the IC on a very cold day.

 

[Roh92cp]

IAT2 sensor is reading compressed cooled air in the discharge manifold. Sensor us either stock or it was included in my KB kit. And the pcm is reading it through the dash

Ok it's part of the KB kit right, but then where are you seeing AIT2 readout from the dash. The center dash readout only has IAT1 reading from the MAF pre compressor. I think what you are referring to is the inlet air which is usually 6-10 degrees above ambient.

 

[Obsol3te]

Ok well, then its iat1? Going to verify in a minute and disconnect that sensor.
Here's a video at cruise which is pretty hard to do with a manual holding a phone

 

[Roh92cp]

Ok well, then its iat1? Going to verify in a minute and disconnect that sensor.
Here's a video at cruise which is pretty hard to do with a manual holding a phone

Too funny "what's cruising Dad"? ooh ah, "looking for hot babes"' but tell mommy it's just means driving around:lol:

you are looking at the inlet air stream before the supercharger heats the air. The thing that is strange is that can't be correct either becuase the inlet air is ambient air plus engine bay heat depending on location. If your moving getting air moving through the engine and inlet it typically is 10 degrees above ambient and if it s sitting in traffic sucking in hot engine air as well as inlet pipe heating up it will get to 50 or more above ambient again depending on inlet location or if you have an enclosed air box. Something is not right with your inlet air temps and it's important for the ECM to have a correct reading. I would get this checked out with your installer or KB.

 

[Obsol3te]

It's not pulling air from the engine bay like your Whipple setup. It's buried into the fender and is pulling air from the cut lower splash guard. So literally pulling outside cool air. So, I'll take it as that's my iat1 reading then. Still need to verify by pulling the connector on that discharge manifold. It was a home install btw

 

[thatmustang609]

Maybe Travis or Mike can answer this but 90% sure KB is pulling the MAF temp sensor wire and relocating to the manifold allows them to measure post blower IATs

 

[Obsol3te]

Maybe Travis or Mike can answer this but 90% sure KB is pulling the MAF temp sensor wire and relocating to the manifold which is also a way of measuring IATs

Actually yes, I do remember cutting into the harness. Fairly certain that's my iat2 man

 

[Roh92cp]

It's not pulling air from the engine bay like your Whipple setup. It's buried into the fender and is pulling air from the cut lower splash guard. So literally pulling outside cool air. So, I'll take it as that's my iat1 reading then. Still need to verify by pulling the connector on that discharge manifold. It was a home install btw

That's what I thought, but still it's not reading correct, becuase you can't get lower than ambient form the inlet becuase there is still heated air from the road surface and fan wash that will get to it in some way.

Where is the mass air meter located in the inlet track?

 

[z06psi]

I am 10 to 14.9959693939 degrees over ambient even after doing several pulls on the highway.

 

[Roh92cp]

Maybe Travis or Mike can answer this but 90% sure KB is pulling the MAF temp sensor wire and relocating to the manifold allows them to measure post blower IATs

Actually yes, I do remember cutting into the harness. Fairly certain that's my iat2 man

That would answer to why the dash readout for inlet air temp is below ambient, it's not a valid reading anymore and is displayed incorrectly on the dash. Again it's impossible to think you have below ambient coming form the inlet and even more impossible without an ice tank to have below ambient post compressor AIT2.

 

[Roh92cp]

I am 10 to 14.9959693939 degrees over ambient even after doing several pulls on the highway.

This is relating to PD supercharger IAT's my friend. It's also been tested and known that the MAF's built in IAT Sensor is not a fast reacting sensor and can take up to 10 seconds to catchup. This was tested by Dept of Boost against a very accurate and fast reacting thermo couple sensor system.

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