Stock Iat Location

[DTru 0]

I was wondering about the links to the threads about IAT's that you mentioned in one of the threads below. Could you provide the link please? I know the fender pull intake is very popular on this forum but I am not a fan of moving the IAT sensor.

IMO the only way to see how the intake really affects temps is to test it with the sensor in the stock location. Do you make any intakes with this set up?

[Guest Daparrothead]

The main reason the sensor is relocated is because in the stock location the sensor gets heat soaked, which gives you false readings to begin with.

[novawagonmaster 62]

IAT sensor works fine in either location.

[Hemi57 51]

Here is a link to a discussion I had with Diablo over the long and short IAT. Diablo - IAT

[DTru 0]

The main reason the sensor is relocated is because in the stock location the sensor gets heat soaked, which gives you false readings to begin with.

I understand that there is heat soak but I am skeptical about it being false. This reading is just one of many variables in the fuel/air spark timing equation and I am uncomfortable with changing a variable that I do not fully understand. Even if it is reading higher than the actual intake air, who is to say that the engineers didnt already take that into account when programming these equations?

Sitting in traffic you are cooking your intake tube which will heat the air inside. Some say the air is moving too quickly to heat up but I am skeptical about that also.

Regardless, moving the IAT and saying that the temperature drops are all due to the intake is like placing the IAT sensor outside of the vehicle and saying I just created a cold air system. I know that is an extreme example and I am not saying this is what anyone is doing its just to make a point.

I dont doubt that this system actually brings in colder air as its creating a direct path from the bottom of the fender and using materials that have been proven to dissipate heat quickly. I am just saying that you wont know its true effect unless the test is done with the IAT in the stock location.

[novawagonmaster 62]

I have run the LMI "Ture CAI" system (with the filter down behind the fog light), and a custom "headlight" CAI. The true system placed the IAT in the 90* bend behind the headlight. The custom headlight CAI placed the IAT in the 90* bend right at the throttle body.

Both air intakes showed IAT's very high during staging, and both intakes showed IAT's reaching ambient temps during the 1/4 mile run. The difference was in how fast temps went to ambient. The true cai took 5 or 6 seconds to reach ambient. The headlight cai (with the IAT sensor right near the throttle body) reached ambient in 1.5 seconds! And both were using the good old short IAT sensor.

Based on what I have logged, you can put the IAT sensor anywhere in the duct work between the filter and the throttle body, and it ain't going to make a measurable difference.

[DTru 0]

Wow 1.5 seconds after heat soak is amazing and thats in the stock position. Would be awesome if someone came up with a system like that, that was practical for daily driving.

I still think a test of the fender pull with the stock IAT location vs the new location would have different results.

Might have to buy a new sensor extender and run a few tests myself. I actually have two sensors, I would just need to drill a hole roughly in the location of the true cai and see if there is a difference. It wouldnt be 100% accurate since the cai directs the air through the tube but it might give me some idea as to the temperature differences between the two locations.

[novawagonmaster 62]

I still think a test of the fender pull with the stock IAT location vs the new location would have different results.

I doubt it, but if you have the time and resources to verify, that would finally put it to rest.

[legmaker 43]

Wow 1.5 seconds after heat soak is amazing and thats in the stock position. Would be awesome if someone came up with a system like that, that was practical for daily driving.

I still think a test of the fender pull with the stock IAT location vs the new location would have different results.

Might have to buy a new sensor extender and run a few tests myself. I actually have two sensors, I would just need to drill a hole roughly in the location of the true cai and see if there is a difference. It wouldnt be 100% accurate since the cai directs the air through the tube but it might give me some idea as to the temperature differences between the two locations.

Sorry I missed this......

Moving the IAT sensor to the stock location will have a very small difference. Matter of fact, the record holder for a stock 6.1 n/a challenger was a LMI True CAI user with the sensor in the "stock" location. I move the sensor upstream to gather the most accurate sampling of the air coming into the intake. The difference between the two locations of the sensor will not have the difference that you think. Bottomline, the True system is one of the best systems for this platform for capturing the most, or closest to, ambient air as possible for a street car.

[Speedy 247]

Has there been any testing of the LMI on PD supercharged applications to see if there is any benefit? I was going to mount a remote thermometer on my car at the Mopar CAI location and do a test, then mount the same thermometer down behind the fog light and run a 2nd test to see if there was any temperature reading difference. I figure this will tell me the temp of the air that would be drawn in to the intake at each location.

If something similar has already been performed it would save me the time.

[DTru 0]

I forgot about this actually but thanks for replying.

I did some more reading and ran across a post where someone tested a few different locations with the stock setup and there wasnt much difference like you said.