Thread: FS: ~~~ BDJ Duel Intake - $300 OBO ~~~
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Old Jun 13, 2011 | 03:16 PM
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onehundred80
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Default Re: FS: ~~~ BDJ Duel Intake - $300 OBO ~~~
Originally Posted by XXxx_Totmacher_xxXX
cooler air? Have you gone out and felt the heat soak any intake including stock sees on this platform? I challange you to go do 3 WOT pulls, pull over and hold your hand directly on your CAI for more then 5 seconds...

I would argue the Inlet Air Temps / Charged Air Temps hardly vary outside a reasonably measureable amount between this intake, Rob's intakes or a stock intake. Thats not even discussing all these larger pully cars running the S/C at it's brink and really kicking up those charged temps.

Thats not to say I'm discrediting Rob's intakes, I like Rob and have supported him well before the crossfire community even came about. I will say though his Intake makes more power over stock through the removal of bottle necks, a smart free flowing design and use of high quality materials. I wouldn't attest any repeatable and measurable gains to reduced Charged Air Temps which is the question at hand. Rob's work is top notch, Welds are beautiful, materials are picked for quality not quantity and his service is bar none.

I saw no drops in power pull after pull with this intake which would provide worst case heat soak conditions sitting on a dyno without even a fan on the intake.
I have measured the temperature all over the stock engine cover (na) and I have found temperatures up to 160 deg F. which is due to long term heat soak.
Air passing through the system travels so fast it will not pick up too much heat as it does not stay in the system too long.
Air from in front of the radiator will be cooler than air picked up inside the engine bay as the majority of that air has passed through the rad fins which are designed to transfer heat to the air.
Your argument is that air exiting the short intake will be as cool as air exiting the longer intake situated in front of the rad.
I doubt that you can argue that the extra length of intake is as good a heat exchanger as the rad.
Your dyno pulls are a comparison of apples and apples and not apples and oranges.
The air exiting the rad is only a few degrees warmer than the air entering the front face of the rad but that air is also warmed by the engine to some degree.
My original argument was about the low and high end differences of the two systems and not about overall efficiency.
Physics says that the lower the initial temperature the better and I believe that the intake in front of the rad is the best. The actual power difference may be less than thought though.