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Old 05-21-2013, 12:44 PM   #1
new wrx 13
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Default New Air Filter

I just put in a new air filter. Its a AEM flat panel oem replacement. My car is a 13 WRX. I was wondering about safeness after talking to Cobb tuning. They told me +08 WRX's are very sensitive to air adjustments. I'm not getting any cel or any other lights or problems. The company that I bought it from said there would be no problems. Does anyone think I should have any worries with this filter?
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Old 05-21-2013, 12:50 PM   #2
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Nah, issues mainly happen when you change the piping/flow of air (CAI/short ram). A drop-in filter won't hurt ya.
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Old 05-21-2013, 01:01 PM   #3
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Just check your fuels trims using your AP. (AF Learning #1 A,B,C,D) They should all be +/-5 % (+/-3% are optimum).
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Old 05-21-2013, 01:59 PM   #4
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Quote:
Originally Posted by tec_41 View Post
Nah, issues mainly happen when you change the piping/flow of air (CAI/short ram). A drop-in filter won't hurt ya.
A drop in filter CAN change the MAF readings.
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Old 05-21-2013, 02:02 PM   #5
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Quote:
Originally Posted by HinshawWRX View Post
A drop in filter CAN change the MAF readings.
Oh stop! I'm sure it DOES, but not to a point where the car can't compensate. It's like the difference between a filter being a little dirty and replacing it with a new one.
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Old 05-21-2013, 02:25 PM   #6
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Thanks for support. I guess if I don't have a cel its probably not enough too be concerned with.
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Old 05-21-2013, 02:29 PM   #7
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Quote:
Originally Posted by nmlittlebigman View Post
Just check your fuels trims using your AP. (AF Learning #1 A,B,C,D) They should all be +/-5 % (+/-3% are optimum).
I don't have one yet.
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Old 05-21-2013, 02:32 PM   #8
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Quote:
Originally Posted by new wrx 13 View Post
Thanks for support. I guess if I don't have a cel its probably not enough too be concerned with.
Damage can occur before the car has a chance to illuminate your c.e.l.
It's generally better to be preventative than it is reactive. The latter can cost you big money.
Without monitoring your car you have no idea what kind of risk you are taking. Oh well
good luck
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Old 05-21-2013, 03:13 PM   #9
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It would not be a bad idea to check the cars AF learning, but it is unlikely that a drop in filter will make any drastic changes.
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Old 05-21-2013, 03:14 PM   #10
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Quote:
Originally Posted by new wrx 13 View Post
Thanks for support. I guess if I don't have a cel its probably not enough too be concerned with.
Or you could just put your stock airbox back on since changing it for what you do does zero for you performance wise.

Why risk it?
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Old 05-21-2013, 03:16 PM   #11
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Originally Posted by Napalm3nema View Post
Or you could just put your stock airbox back on since changing it for what you do does zero for you performance wise.

Why risk it?
He has the stock airbox, just a different filter.
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Old 05-21-2013, 03:34 PM   #12
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Quote:
Originally Posted by nmlittlebigman View Post
Damage can occur before the car has a chance to illuminate your c.e.l.
It's generally better to be preventative than it is reactive. The latter can cost you big money.
Without monitoring your car you have no idea what kind of risk you are taking. Oh well
good luck
Your telling the OP to buy a cobb ap to monitor the engine after an air filter swap?? lol Hell then I guess you gotta go buy a ap to monitor the dirtiness of the stock filter then.. Im sure he is still under warranty and I am sure a drop in filter won't void him of it so the big money part isn't really an issue.

I agree that you should buy an accessport but aem knows their business well and I highly doubt you will have any issues with a drop in air filter..
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Old 05-21-2013, 04:03 PM   #13
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I put in a K&N in my 08 WRX and had no problems before I went stage 2 and got a SF intake. OP you should be fine with that filter.
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Old 05-21-2013, 04:20 PM   #14
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Quote:
Originally Posted by .Boston. View Post
Your telling the OP to buy a cobb ap to monitor the engine after an air filter swap?? lol Hell then I guess you gotta go buy a ap to monitor the dirtiness of the stock filter then.. Im sure he is still under warranty and I am sure a drop in filter won't void him of it so the big money part isn't really an issue.

I agree that you should buy an accessport but aem knows their business well and I highly doubt you will have any issues with a drop in air filter..
I didnt tell him to buy an AP. I assumed that he had one because he mentioned Cobb in the first post. I just advised him to be safe he should monitor his fuel trims to find out what if any effect the filter has. As HinshawWRX said drop ins CAN affect your maf scaling.

Roll into a dealership with an aftermarket filter in the event your car throws a c.e.l. If it happens to be a system lean code or worse...ahh nevermind I'm sure he would throw his o.e.m filter back in the box.
So much for trying to help.
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Old 05-21-2013, 04:29 PM   #15
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Quote:
Originally Posted by .Boston. View Post
Your telling the OP to buy a cobb ap to monitor the engine after an air filter swap?? lol Hell then I guess you gotta go buy a ap to monitor the dirtiness of the stock filter then.. Im sure he is still under warranty and I am sure a drop in filter won't void him of it so the big money part isn't really an issue.

I agree that you should buy an accessport but aem knows their business well and I highly doubt you will have any issues with a drop in air filter..
No one said to buy an AP. The point is drop in filters CAN and HAVE affected maf scaling. Is that to say you should be worried? Not entirely likely. Just note that it is possible to do so.

That being said, there are MANY forms of engine management that can tune a car, the AP is only one of them. Also, with a 2013 model the stock air filter is likely fine, in the case it isn't, put whatever you want in. I wouldn't over pay for an AEM/K&N personally hoping it gets gains anywhere.
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Old 05-21-2013, 09:05 PM   #16
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Quote:
Originally Posted by HinshawWRX View Post
No one said to buy an AP. The point is drop in filters CAN and HAVE affected maf scaling. Is that to say you should be worried? Not entirely likely. Just note that it is possible to do so.

That being said, there are MANY forms of engine management that can tune a car, the AP is only one of them. Also, with a 2013 model the stock air filter is likely fine, in the case it isn't, put whatever you want in. I wouldn't over pay for an AEM/K&N personally hoping it gets gains anywhere.
I just asked Cobb if they had that canned tune already if I was to buy AP. I just don't have money for AP yet. Maybe I will put stock filter back in till I get AP.
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Old 05-21-2013, 09:09 PM   #17
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The aftermarket filter won't do anything for you, with or without a Cobb Accessport. It might sound a bit different but nothing more unless you start making bigger power.

I'd just return it and get an AP, or leave it stock if you're worried about your warranty.
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Old 05-21-2013, 09:42 PM   #18
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AEM says it won't void warranty.
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Old 05-21-2013, 10:16 PM   #19
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I just asked Cobb if they had that canned tune already if I was to buy AP. I just don't have money for AP yet. Maybe I will put stock filter back in till I get AP.
Stage 1 would be a tune for you. Stock or with an aftermarket supported intake. (Hint, Cobb SF intake or AEM cold air intake. Not a drop in filter)

Quote:
Originally Posted by new wrx 13 View Post
AEM says it won't void warranty.
Of course they do. I know Ebay has plenty of power chips that say the same thing.

Listen, go ahead and keep it. Just don't expect any gains out of it. An AP (or any sort of real tuning for that matter) will gain you much more. Slow down, read Unabombers Manifesto, and learn.
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Old 05-21-2013, 10:35 PM   #20
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Sounds good. Thanks for your help.
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Old 05-22-2013, 04:24 PM   #21
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The stock filter isn't as restrictive as people think, especially for a mostly stock car.

Even with a cai, tuning is required to make gains (and to keep your engine safe). So, realistically, a panel filter might yield no gains.
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