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Old 03-24-2013, 10:21 PM   #1
Blades
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Mythbusted about cold air intake



These guys make a pretty cool video .. i think those that send $400 on a tube and cone should dyno there cars before and after.

http://youtu.be/gCi2yo4UqPI

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Old 03-25-2013, 09:17 AM   #2
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surprised no one commented yet
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Old 03-25-2013, 09:56 AM   #3
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These guys are a joke. Dyno's can't recreate real life conditions Arek. I tuned my M3 on the dyno, than went out and did data logging on the highway and the values were totally different.
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Old 03-25-2013, 11:01 AM   #4
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These guys are a joke. Dyno's can't recreate real life conditions Arek. I tuned my M3 on the dyno, than went out and did data logging on the highway and the values were totally different.
Some e90 guy did a dyno test with 4 different CAI .. only one that gave him dyno results was the euro airbox (bmw performance model) and the ECIS replica type. You can't tell me that any type of CAI will improve performance (ebay $20 intake for example) just because its a cone over the stock box.
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Old 03-25-2013, 10:10 PM   #5
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I think like it was said already, you would have to tune the amount of fuel being injected.

Whats the point of a cold air intake? Get cooler air. Cooler air is denser and has more O2, which should make the engine more effecient.

But whats the o2 density between 10 degree celsius air and 25 degrees celsius air.
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Old 03-25-2013, 10:14 AM   #6
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It's also kind of bunk doing that test on a boosted car...
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Old 03-26-2013, 11:06 AM   #7
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It's also kind of bunk doing that test on a boosted car...
Exactly this... lol... IAT's will match what the IC can cool basically.

Most CAI's will show gains not because of placement, but because of flow increases... if the factory setup isn't restrictive in the first place, gains will be minimal... If the aftermarket setup is worse (maybe not with flow capacity, but say with velocity and/or turbulence) you might loose power.

On NA cars, a CAI will show gains if the induction air is coming from a colder area then the engine bay of course.
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Old 03-26-2013, 11:27 AM   #8
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Exactly this... lol... IAT's will match what the IC can cool basically.

Most CAI's will show gains not because of placement, but because of flow increases... if the factory setup isn't restrictive in the first place, gains will be minimal... If the aftermarket setup is worse (maybe not with flow capacity, but say with velocity and/or turbulence) you might loose power.

On NA cars, a CAI will show gains if the induction air is coming from a colder area then the engine bay of course.
Here is another video they did on a non boosted car .. just called it PODs in Australia i guess

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Old 03-26-2013, 12:34 PM   #9
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Here is another video they did on a non boosted car .. just called it PODs in Australia i guess

Yeah... the classic hot air intake lol. The filter is sitting at the back of the motor and they are running with the hood closed on the dyno. No surprise that it made less power. The stock air box on that car is definitely superior to that set-up.
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Old 03-26-2013, 03:49 PM   #10
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Here is another video they did on a non boosted car .. just called it PODs in Australia i guess
Exactly the results I would have expected...

Hot air intake (cone filter) in the back of the engine bay vs. the stock airbox which is designed to pull cooler/fresher air.

Cooler air = denser = more power...

Another useless test from these guys
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Old 03-26-2013, 04:21 PM   #11
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Exactly the results I would have expected...

Hot air intake (cone filter) in the back of the engine bay vs. the stock airbox which is designed to pull cooler/fresher air.

Cooler air = denser = more power...

Another useless test from these guys
unless tests but funny how many people pop open there hood and I see the same type of hot air set-up.
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Old 03-25-2013, 11:18 AM   #12
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I don't think that's what he's saying. Just that their method of busting the myth is kind of BS.

I will agree that expecting the gains that some companies advertise just by slapping on their filter is retarded. The stock intake system would have to be pretty poorly designed to be holding back 10hp. Not only that, but WOT maps are usually fixed maps anyway, so unless the car happened to be running too rich to begin with, without re-tuning the fuel map any extra air isn't going to make extra power without extra fuel. It's the part throttle areas where gains that don't show up on the dyno might be noticed.
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Old 03-25-2013, 01:05 PM   #13
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I don't think that's what he's saying. Just that their method of busting the myth is kind of BS.

I will agree that expecting the gains that some companies advertise just by slapping on their filter is retarded. The stock intake system would have to be pretty poorly designed to be holding back 10hp. Not only that, but WOT maps are usually fixed maps anyway, so unless the car happened to be running too rich to begin with, without re-tuning the fuel map any extra air isn't going to make extra power without extra fuel. It's the part throttle areas where gains that don't show up on the dyno might be noticed.
Ya that makes sense .. someone should through this into a civic forum

I think 90% dont do any re-tuning to the fuel maps / ecu
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Old 03-25-2013, 01:24 PM   #14
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Haha I would say 95%
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Old 03-25-2013, 03:28 PM   #15
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On an M5, it has been proven a few times that CAI actually cause it loose power. Some guy did before/after dyno's and compared a couple of different intake set ups. I am going to try to find the thread.
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