Engine/Power - EJ25T (STI and 2006+ WRX) Discussions about the USDM 2006+ WRX and WRX STi 2.5 liter turbo flat-four.

intake for sti

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Old 09-21-2003, 06:28 PM
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get regular one
CAI will get u a lot of weird engine noise, and u can't clean the filter easily
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Old 09-24-2003, 07:27 PM
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CAIs dont really matter with turbos and intercoolers
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Old 09-26-2003, 12:55 PM
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With FMIC:

Flip your intake manifold, delete A/C compressor, and run much shorter piping...
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Old 09-27-2003, 09:43 PM
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not cheap, and I don't know who makes the piping

Originally posted by metoo
Great idea! Should only cost about 20 bucks and 30 minutes of your time.
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Old 09-28-2003, 10:31 AM
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http://www.kaynzengineering.com/stealth.htm

The longest part about getting to this air filter and cleaning it is.. jacking up the car. Otherwise it will take you 5 minutes max.
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Old 10-11-2003, 11:38 PM
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Heres what I did about a CAI, works great

I was going to get an AEM CAI butafter hearing all the problems with using a CAI, I figured I would just get one of the Ebay reverse engineered CAIs, if it didnt work out, Im only out 35 bucks. I hook it up and it does just what everyone says it will, good down low, but by fourth gear I can only make 9psi, by 6th im making 4 I go to put to stock box back on and notice the the hole with the rubber gasket in the stock box that goes down to the snorkel actually fits and makes a perfect seal over the secondary CAI pipe, the one that goes sown into the fender well! so I install the stock box back with the CAI pipe feeding into it and just cut out the paper element, works like a charm! I get better bottom end and response and no problems with boost, best of all it looks completely stock
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Old 10-14-2003, 08:58 PM
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Originally posted by tm999xxx
umm...cold air into hot turbo...just get a short ram
Ram airs are bad. How is using hotter air than the factory intake gets possibly better? "Cold Air" intakes aren't really any better. The best case scenario for an aftermarket intake is that it works exactly the same as stock. If it flows more than stock, your MAF readings will be off, and the car will run lean. If it reduces flow, which some intakes do, the car runs rich. The worst part is that intakes have different effects at different loads and different RPMs.

As for sound, if you remove the silencer and plug the holes in the fender, it will be just as loud as an aftermarket intake, only cheaper and safer.
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Old 10-14-2003, 09:03 PM
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cold air is better because it's dense... more air = more power. Even if that greater quantity of air is going to be immediately heated up it's still there and in greater quantity... = more power

and besides the intake side of the turbo is hot... but not as hot as the exhaust side so cold air does matter before it hits the intercooler.

Unless I just have that totally wrong. In which case I want pictures!!!
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