To Intake or stay stock airbox - Subaru WRX Forum
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post #1 of 23 Old 08-29-2013, 07:25 PM Thread Starter
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To Intake or stay stock airbox

I am currently running Stage2 HWG with an Invidia Q300 TBE and K&N drop in filter in my 2012 WRX hatch. I have read many negative posts about the drop in. I ran a datalog from 2K to 7K RPM's. I sent the report to Cobb and they wrote me back saying how my datalog looks real strong and healthy and how the K&N drop in is either a hit or miss, in my case it is a hit. Now, the dilemma is whether or not I should keep what I have since it is running great or go with an after market intake.

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post #2 of 23 Old 08-29-2013, 07:33 PM
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The Cobb maps should work well with their SF intake so I see no reason to not consider upgrading.

If you get the version with the airbox your IATs should stay pretty cool and your car will sound a good bit better from the less silenced design.
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post #3 of 23 Old 08-29-2013, 08:34 PM
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Not trying to threadjack but what are idea iat's? I say go with a intake that's compatible with your Cobb map, op. If i remember correctly the stock intake on the 08+ is a little more restrictive than the previous models where they were good up to 350-400 hp. Maybe someone more savvy on the newer models can confirm that.

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post #4 of 23 Old 08-29-2013, 08:43 PM Thread Starter
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My datalog did not record my IAT. When I'm driving, the difference between ambient air and intake air is usually within +or- 4 degrees.

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post #5 of 23 Old 08-29-2013, 09:06 PM
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I was under the understanding that the 08+ stock intakes were good up to 400 hp

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post #6 of 23 Old 08-29-2013, 09:54 PM
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^you could be right. Thought i read something somewhere that they were more restricted. I could be wrong though and i don't want to put any false info out there. If they are good then the op should put that cash somewhere else like a pro tune unless he is wanting to hear that sweet intake song we all love. Now that I think about it, the iat's have a lot of variables. I'm sure cai, sri, and ambient temps all factor in. Reason I was curious is because mine always seem high.

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post #7 of 23 Old 08-29-2013, 10:14 PM Thread Starter
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With the K&N filter I can hear the spool up from the turbo really well. I can't seem to cruise with my windows up just so I can hear it. I might just go ahead and invest in an AEM cold air. Cobb has a map already for it, and I wouldn't mind increasing the sound of my car.

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post #8 of 23 Old 08-29-2013, 11:04 PM
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I have an aem cai with the cobb ots stage 2+aem and it really brings the turbo sound out. I personally love it. I definitely recommend the aem over the cobb intake. The sound you get now probably isn't anything close to an aem cai. Fyi if you're looking for aem summit had them the cheapest and I got it the next day with free shipping.

Get a tbe and you have some wonderful songs to be played lol.

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post #9 of 23 Old 08-29-2013, 11:08 PM
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You'll get some people telling you the stock airbox is good up to xx power... But so is the stock catback, stock intercooler,stock headers, stock clutch, etc....

In my opinion upgrades are for people who want power... A car with stage 2 will make x power... A car with stage 2 and an intake will make x power plus 10-15 hp...

Lets just say (generic numbers here) a stage 2 wrx makes 220 whp.... Well with headers, intake, ported turbo, bigger intercooler... Etc.... You could make 250-260 whp.... As long as you are tuned for it...

An intake will make your car sound cooler... As far as safe, your acessport or whatever you use for tuning should have a data logging option. Log your knock, your timing, and your air fuel mix. As long as there isn't knock your solid... If there is... Add a little more fuel at that point in the tune... In my opinion anyone with a "tuned" car with upgrades should be logging their car and know at least a little about what's happening. Generic stage 2 maps are usually pretty safe, but lets say your car is a black sheep and is knocking or running lean... I wouldn't change an ecu map without logging it at least once or twice in different conditions.
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post #10 of 23 Old 08-29-2013, 11:43 PM Thread Starter
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I completely understand. I've datalogged during the hottest part of the day, 98℉, and again at night at 74℉. Both times I didn't get any knock. I know my engine is running great with the K&N drop in, but I think my OTS Stage2 HWG tune will benefit more from an AEM CAI

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post #11 of 23 Old 08-30-2013, 12:12 AM
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You may be right, getting the intake and any other parts you might want... As long as you log you should be safe... Once you get all the parts you want get a protune and take full advantage of the intake and everything else
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post #12 of 23 Old 08-30-2013, 03:41 PM
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Just run the stock airbox and save yourself the money to spend on something else...

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post #13 of 23 Old 10-09-2013, 09:47 PM
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What do you guys think of the K&N CAI not the drop in. K&N has always made great intakes. With the AEM how much of a chance is there to actually suck up any water?
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post #14 of 23 Old 10-09-2013, 09:52 PM
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how are u going to tune the intake? cobb or protune?
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post #15 of 23 Old 10-09-2013, 10:23 PM Thread Starter
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Okay, here is my verdict. I have now been running AEM CAI with my Cobb stage2+AEM. I have noticed better throttle response, more top end pull, and overall better performance than my K&N drop in filter. Some may experience different results or have their own philosophy on the issue, but my dive into the aftermarket intakes was well worth it. I appreciate everyone's input when I started this thread, but I am really glad I checked it out on my own.

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