CAI for sr20det

[warauto]

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[heavenboundkevin]

why would someone do that, instead of using an intercooler set up.?

[warauto]

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[warauto]

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[mandoz85]

Your turbo compresses the air coming in so a CAI is pointless, thats why you have an intercooler.

[Sileighty_85]

for a DD this is the cloest thing you wanna use for a CAI
Trident Marine 400 402 Series Vent Duct W Wire Black Or White 3" Black Vinyl Vent Hose 50'Bx - 4023006BX - BoatersWorld.com (http://www.boatersworld.com/product/MP80817191.htm?utm_medium=cpc&utm_source=ShopZilla)

If you stick and intake filter outside IE in the lower fender infront of the tire, if you drive it in the rain your turbo is gonna suck up water if you hit a puddle.

for a track only car thats not driven in the rain yeah it might help a little

[burnsauto]

won't help. its useless.


the air is compressed aka... its heated.

Use an intercooler, if thats not good enough CO2 the thing or nitrous sprayer.

[warauto]

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[fliprayzin240sx]

Ultimately, the charged air temp coming into your intake manifold isnt going to be that much cooler to make a difference.

[warauto]

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[bejota180sx]

have u taken no physics class? compressed air no matter HOW COLD heats up while being compressed, so its cold the heated then cold again by the intercooler... what's the point when it's the same as heated then cooled down...

I've seen a bunch of GTIs and SRT-4 with cold air intakes and i really have no idea why... they should really make any effect...

try it and take data of everything, maybe you can prove it does help... it's not hard making a cold air for a SR engine...

[fliprayzin240sx]

I'm sure they've tested this theory out here in Japan already...if this idea was a good idea, they would have made a cold air intake for turbo applications a loooooong time ago, even if its just a gimmick.

You want cooler air...ditch the stock IC.

[fromxtor]

^^One more time, it's interCOOLER. The charge air coming out of your turbo which is hot, gets cooled down via the intercooler. Trying to cool down a turbo's intake air is like trying to spit on a forest fire trying to put it out.

[chituntang]

Cooling 10 degree for intake temp is different from cooling 10 degree after the turbo compress it. Once the cool air goes in and out of the turbo, it is not cool anymore. 10 degree cooler before turbo will not be 10 degree cooler after the turbo. And if it makes a 1 degree difference? Why the hell you are doing it?

[warauto]

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[warauto]

Cooling 10 degree for intake temp is different from cooling 10 degree after the turbo compress it. Once the cool air goes in and out of the turbo, it is not cool anymore. 10 degree cooler before turbo will not be 10 degree cooler after the turbo. And if it makes a 1 degree difference? Why the hell you are doing it?

Your intake temp to the turbo is 150 degrees, for instance the compressed air comes out at 200 degrees then the intercooler takes it down 50 degrees and then it enters the TB 150 degrees, not taking into consideration other variables...roughly.

On now intake temp 140......compressed air 190...intercooler to TB (new temp) 140 degrees.

[projectRDM]

You're arguing a pointless argument.

Placing the air filter outside the engine bay also creates added distance, so the air velocity through the intake pipe will still heat it up as it travels farther.

The turbo will continually add more heat the hotter it gets, so no matter how much cooler the air is to begin with it's constantly heated more and more as it's compressed. A turbo is basically a heat pump anyway.

Heatsoak from the intercooler will lose some efficiency as the engine is run longer, so the 'cooler' air you're trying to gain will see less effect as it's cooled.

The best you could ever hope for is maybe a drop of 3-4 degrees by placing the filter outside, and you'd lose that the minute the car reached operating temperature.

On an NA car where the air is suctioned in, there's more of a benefit but even in that respect the length and design of the piping has an effect due to velocity changes.

[warauto]

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[bejota180sx]

wouldnt heat wrapping IC piping keep the heat inside also, meaning that the pipes could not cool down by expeling (sorry if i wrote this wrong) the heat?

[warauto]

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[warauto]

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[s13kid989]

honestly... you are retarded and don't understand...IT'S FUCKING POINTLESS.

:]

[johngriff]

Warauto,

How many other knowledgeable people are you NOT going to listen to?

You started a thread asking a question to prove a point YOU have pre-determined.

Colder Air = Denser air, which makes cold air critical to improving air volume in a NATURALLY ASPIRATED ENGINE.

As soon as you compress the air, that means dick. Compressed air at 10c is still 10psi, at 20c its still 10psi, if you want MORE air, you increase boost.

Air temperature is critical only to pre detonation in a Forced Induction engine.

Helping hands for that setup is the Intercooler, a Cold INTAKE manifold (think carbon fiber) and aluminum intercooler pipes to quickly exchange heat. Cooling the intake air to the turbo is not going to make ENOUGH of a difference, especially when it is run next to the exhaust system of the car (ie the turbo).

If you have high under hood temps its probably because your IC and Radiator ducting is nothing but dildos. Straighten that out, then you won't heat soak the rest of your underhood components.

Or.

Prove us all wrong with some Experimental Evidence rather than empirical evidence (http://wiki.answers.com/Q/What_is_empirical_evidence).

[bejota180sx]

"i feel it better" doesn't prove anything, at least not in this thing we are talking about... kinda like saying, i installed lighweight lugnuts, i feel the reponse better (something like that, it's a example!!)


do some dyno runs and prove us wrong, i remember learning that crap in high school and first year in college, compressing air makes it's temp raise... simple physics...

[steve shadows]

Your turbo compresses the air coming in so a CAI is pointless, thats why you have an intercooler.

I used to think this as well but it actually does contribute to a few things.

Hot Air at your intake increasing the air temps in the turbo and also effects how much harder your Intercooler has to work. You need to invest in a good intercooler but cold air charge entering the front of the turbo does have some great benefits.

This was actually tested and proven by using our air temp logger on the Dyno Dynamics on countless cars. The effect on getting some air flow to peoples air intakes on their turbo were noticed right away in low end and top end power curve shape and peak numbers. It also greatly effected air charge temps before and even after the intercooler (espeically if the intercoolers were tube and fin and smaller in size).

I would definitely suggest routing the air filter on the front of the turbo in a way where it can at least suck air with plenty of room around the filter, i.e. it is not shoved into a part of the car fender where it is congested, and then I would find a way to funnel some air with a dryer duct up to the area for the filter is resting, for the best results.

Cheers

[duffman1278]

Compression of a lower temperature will give you a lower compressed temperature after wards. To say that by the time it gets to the turbo it will heat up is not really all that true. I really don't think the amount of heat inside the engine bay will be hot enough enough, and transfer fast enough to return the cooler air collected, back to the air at which a short ram intake would collect.

[S14DB]

Ideal gas law - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Ideal_gas_law)
Adiabatic process - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Adiabatic_process)

[Z32TT-R]

wouldnt heat wrapping IC piping keep the heat inside also, meaning that the pipes could not cool down by expeling (sorry if i wrote this wrong) the heat?

correct, now that its wrapped the air inside cannot dissipate easier trapping hot air in your i/c piping basicly IMO dumb thing to do take the heat wrap off

[duffman1278]

Ideal gas law - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Ideal_gas_law)
Adiabatic process - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Adiabatic_process)

Bingo!

Air = ideal gas

Although I wouldn't fully say that it's an adiabatic process however the amount of heat coming in or out of the system might be negligible.

[johngriff]

funnel

And I just fell out of my chair laughing.

Not that your observations weren't right, it was you I was waiting for in this thread all along:love:

[warauto]

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[g6civcx]

This is easy to figure out. Buy a temp probe with a datalogger. Plug it into the charged pipe near the TB. Then drive around and see what happens.

Do the same for the CAI.

Compare.

Then you know what CAI does for air temp.

[bejota180sx]

also log what happens with the heatwrap, see the difference...
be sure to test it at different times, kinda like... what it does at idle, what it does at highway, track days, short runs, long runs... the more info the more a conclusion can be made if it does make a significant improvement, if any...

if u want to lower intake temps, i don't know why i hadn't given this idea, i've seen some good results with taking the intake piping and where the filter goes on our driver's wheel well side in that area you can make like a chamber... kinda like a aluminum plate similar to the brake heat shield, and separate a bit where the filter takes air from... sorry if i didn't explain myself better im kind of in a hurry, i'll post pics when i have the chance later on tonight...

[drftmark]

This is an easy task, try this:
1.Make the intake tube do a 180 degree turn and go inside through the firewall, then make sure the tubing connects to one of the a/c ducts.
2.Turn the a/c on to full cold, and make sure you have the fan speed on full blast to keep the turbo spooling
3.Go do 10 minute burnouts after with the amazing power you gained

[warauto]

No more threads from me. Thanks

[S14DB]

Way to chickenshit out. Now people can't learn from your mistake.