Mod your ACT Sensor And Gain HP?!

PERRIN_Jeff said:

I want to make sure that everyone knows there are two IAT readings. Just to make sure you are looking at the IAT reading in Ktuner? In the Ktuner software, the have the charge temp sensor displayed as IAT, but I am not sure what Hondata uses. To me, the charge temp sensor should be labeled differently to ensure people don't think its the air temp sensor that is in the MAF/intake system. I mention this because If you have heat soak issues, I would make sure you are not looking at the wrong IAT reading. Secondly, if you have an aftermarket intake you could be seeing heat soak issues because of how the intake was designed. I have even seen heat soak issues and high intake air temp readings on the stock intake under extreme conditions (even on the dyno). As once that air box heats up, it makes for high readings during stop and go traffic and even under track conditions.

And you are correct, it is not that the air temp it self is causing a loss in power, it is the ECU pulling back the power because of the air temps. Two solutions: Find the other air temp related table (Ktuner has one of them exposed that limits boost based on air temp) in the ECU and modify it, or make for more accurate air temp readings. In the land of Subaru's, these tables are exposed and modified easily. This helps with making consistent power in a broader range of conditions without an unnecessary reduction in power. An example is, a dyno run with the intake air temp (at the MAF sensor) reading 110F versus 70F doesn't change the actual power at the wheels.

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idragmazda said:

Thanks for clarifying. Yes I’m talking about the temperature post intercooler going into the engine (not the temp at the intake as that in my opinion is much less important since it’ll get heated up anyway through the turbo etc.)

Looking forward to peoples experience with this.

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fk8mike said:

did mine,sensor was on the cage to so placed on the center no oil(meth/catchcan)BUT i removed all the small pieces and

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RedGiant217 said:

This mod will bring the temperature readings down...and make them inaccurate.
That shroud is most likely intended to reduce air flow over the sensor to get more accurate/consistent readings. By removing the shroud, you are allowing air to flow more directly on the sensor which will cause convection and lower readings.
It may be producing more power, but I'd be worried about side effects of the ECU getting false temp readings.

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RedGiant217 said:

This mod will bring the temperature readings down...and make them inaccurate.
That shroud is most likely intended to reduce air flow over the sensor to get more accurate/consistent readings. By removing the shroud, you are allowing air to flow more directly on the sensor which will cause convection and lower readings.
It may be producing more power, but I'd be worried about side effects of the ECU getting false temp readings.

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FK8_K20c1 said:

IMO they are not false temps. It is what really the engine is breathing. There are tables to reduce or not reduce timing per temperature based on the ACT. If the engine is receiving cold air why take power away by the sensor reading higher than it should?

I did the mod myself and ordered a new sensor to have it as spare unmodified. I will be doing more testing and dataloging to see the impact of this. I did noticed colder temps than before and iat1/act being colder than iat2. Overall lower temps even at low speeds where the act/iat1 tend to skyrocket.

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PwrOfDreams said:

What a breakthrough find. Before this mod I thought my newly installed PRL intercooler wasn’t working because the high temps are not going down when driving moderately. It would either raise or stay the same with minimal change. Now the temps are reduced in partial throttle and not only at WOT.

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