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Combating Intake Heat Soak

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#41 ·
Sladek said:
what would be the difference in this versus something like a CAI? other than the hole that leads directly out front isn't it essentially the same?
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The main thing, to me anyhow, is its easier to change the filter this way. Also, unless you use a foglight bezel to add fresh (ram) air for the CAI, then this setup will still run a little cooler.

FWIW, when I was researching this idea here is what I came across:

Stock aribox averaged +4 to +8*F above ambient
CAI averaged +2 to +6 above ambient
Short Ram intake (Cobb SF) averaged +25 to +30 above ambient
(I am quoting from memory so these numbers are very close, but might be slightly off)

My setup however, seems to average +0 to +2*F above ambient

***all these temps are at speed.
 
Discussion starter · #42 ·
Sladek said:
what would be the difference in this versus something like a CAI? other than the hole that leads directly out front isn't it essentially the same?
Click to expand...
It would be more or less the same if the short ram was effectively enclosed and blocked from underhood heat.
 
Discussion starter · #46 ·
#47 ·
joejoe69 said:
AEM only recently released their CAI for the 2015 STI. I went with the Cobb SF because the OTS was readily available to run it before my protune. I have no issues whatsoever with the OTS other than the heatsoak.

I also have something planned that can't be done with the AEM configuration.
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Do you think the differences between the AEM and COBB intake warrant the exclusion of the COBB intake map from working with the AEM intake?

Also, I'm having the hardest time waiting to see what you come up with so I can decide if I can copy it or not :lol:
 
Discussion starter · #48 ·
Revrseat70 said:
Do you think the differences between the AEM and COBB intake warrant the exclusion of the COBB intake map from working with the AEM intake?

Also, I'm having the hardest time waiting to see what you come up with so I can decide if I can copy it or not :lol:
Click to expand...
Yes. In previous years, Cobb offered separate OTS maps for each intake. But if you were to get a protune, it wouldn't matter.

The box is nearly complete, just waiting to see how it does on its own before I jump into the next stage for heatsoak prevention.
 
Discussion starter · #51 ·
I finally finished the box this morning but I still have to fab the front lower section to block heat entirely. This is the one of many features which differentiates my box box from Cobb's, in addition to the airbox material and tighter seal. I also have to wait for 10' of rubber edge to arrive then I can start gathering data and update the 3rd post. But let me tell you, at its current state, it's already making me smile.

Everything all bolted up. But it still needs extra thermal protection.



Heatshield Products Lava Mat. Resistant up to 1200°F, 2000°F spontaneous. Looks sexy like carbon fiber. The lid brackets are secured by 90° bent 1/8" aluminum with expansion nuts. DEI thermal barrier is also added inside the box for extra heat prevention.



Dropped in and secured.





Looks closer to stock from the top than Cobb's.




Hope you enjoyed the progress.
 
Discussion starter · #57 ·
I have read that the IAT sensor is combined with the MAF sensor. So it's pre-intercooler. If it was after the intercooler, readings would be much higher because the air is already compressed by the turbo.
 
#58 ·
joejoe69 said:
I have read that the IAT sensor is combined with the MAF sensor. So it's pre-intercooler. If it was after the intercooler, readings would be much higher because the air is already compressed by the turbo.
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That is why I was asking. Why is there so much emphasis on pre-intercooler readings when that air is compressed resulting in increased heat? Might as well focus on a intercooler efficiency instead of intake shielding. The most relevant data is the IAT readings from the air that is about to enter the engine, which is post intercooler.
 
#59 ·
shoe3k said:
That is why I was asking. Why is there so much emphasis on pre-intercooler readings when that air is compressed resulting in increased heat? Might as well focus on a intercooler efficiency instead of intake shielding. The most relevant data is the IAT readings from the air that is about to enter the engine, which is post intercooler.
Click to expand...

True, but the temp (density really) of the air entering the air compressor housing directly effects the efficiency of the turbo and effects the air density of the compressed air.
 
Discussion starter · #60 ·
shoe3k said:
That is why I was asking. Why is there so much emphasis on pre-intercooler readings when that air is compressed resulting in increased heat? Might as well focus on a intercooler efficiency. The most relevant data is the IAT readings from the air that is about to enter the engine, which is post intercooler.
Click to expand...
As the ECU recognizes higher IATs, it will retard timing to save the engine, which in turn lowers power production. Ever wonder why the engine is happier or makes more power (even boost creep) in colder weather?
 
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