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Old 10-10-2010, 10:18 AM   #1
kansai104
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Default is this a good setup for 2.5i?

recently i bought the K&N apollo intake and megnaflow for 2010 2.5i

i m wonderin, is this a good setup for 2.5i??? plz let me know thnx

http://www.knfilters.com/search/prod...?Prod=57A-6040

http://www.magnaflow.com/02product/s...ne=all&id=7783

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Old 10-10-2010, 11:59 AM   #2
.HaVoK.
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I would just stick with a K&N Drop in filter.
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Old 10-10-2010, 01:55 PM   #3
kansai104
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Quote:
Originally Posted by .HaVoK. View Post
I would just stick with a K&N Drop in filter.
So the exhaust system is not good?? I been told. That with that Apollo filter + mengaflow system isvpretty decent setup...
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Old 10-10-2010, 02:16 PM   #4
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the magnaflow is great quality and usually looks fairly stock, other than that it's just your opinion. K/N's oiled gauze filters are not so great for filtration and the better flow is not necessary until significantly more power than stock is going to be made. A quality stock replacement type filter is not a restriction. As far as the intake system goes that Apollo system is so completely different than the stock system and has its own MAF housing so a tune will be absolutely necessary if you want to guarantee safe AFR's and gain any HP. dont expect any power to be gained from the exhaust though. Its just for sound and looks.
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Old 10-10-2010, 02:17 PM   #5
09suby
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Quote:
Originally Posted by kansai104 View Post
So the exhaust system is not good?? I been told. That with that Apollo filter + mengaflow system isvpretty decent setup...
yes, the exhaust system is fine... i don't have that exact exhaust but I do have an exhaust made for a wrx, and it made a difference with throttle response, and power up top. But i also have an intake and a tune, and in my opinion the tune is the best mod I have done to my car.
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Old 10-10-2010, 04:50 PM   #6
kansai104
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Quote:
Originally Posted by 09suby View Post
yes, the exhaust system is fine... i don't have that exact exhaust but I do have an exhaust made for a wrx, and it made a difference with throttle response, and power up top. But i also have an intake and a tune, and in my opinion the tune is the best mod I have done to my car.
Sorry I m a newbi, but I m wondering where to tune the car?? Place for dyno?? how much they go for??
So what u did was that installed wrx exhaust and intake on 2.5i impreza... Do u feel lost of torque At low ref?? I heard high RPM inrease a bit of gAin right??? Sorry I have too questions
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Old 10-10-2010, 06:51 PM   #7
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The intakes definitely flow more up top. I noticed it when I installed my hybrid intake. It's nothing to write home about, but you can definitely feel it.
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Old 10-10-2010, 08:27 PM   #8
kansai104
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Quote:
Originally Posted by chazly413 View Post
The intakes definitely flow more up top. I noticed it when I installed my hybrid intake. It's nothing to write home about, but you can definitely feel it.
so i guess is true what they say on the box....OEM filter is like car breathin through a straw.....what about wrx exhaust system.......would it help?? i know the sound is good...but other than that increase 1hp ???
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Old 10-10-2010, 09:20 PM   #9
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Quote:
Originally Posted by kansai104 View Post
so i guess is true what they say on the box....OEM filter is like car breathin through a straw.....what about wrx exhaust system.......would it help?? i know the sound is good...but other than that increase 1hp ???
It's not the filter, it's the piping between the airbox and the throttle body. I don't get why people think WRX or STI stuff will automatically mean more power. The only thing that will get you noticeable gains out of your exhaust are headers.

This is a hybrid intake:
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Old 10-10-2010, 10:14 PM   #10
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Quote:
Originally Posted by chazly413 View Post
The intakes definitely flow more up top. I noticed it when I installed my hybrid intake. It's nothing to write home about, but you can definitely feel it.
All my data showed the feeling of more power up top was only from the AFR's changing to a better ratio.

Quote:
Originally Posted by kansai104 View Post
so i guess is true what they say on the box....OEM filter is like car breathin through a straw.....what about wrx exhaust system.......would it help?? i know the sound is good...but other than that increase 1hp ???
No, the OEM filter on your car flows plenty unless you start making 200+hp
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Old 10-10-2010, 10:27 PM   #11
chazly413
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Quote:
Originally Posted by RaceFaceXC View Post
All my data showed the feeling of more power up top was only from the AFR's changing to a better ratio.
Interesting. So, then, per williaty's data, would a more ideal AFR lead to a higher g/rev?
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Old 10-10-2010, 10:58 PM   #12
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Quote:
Originally Posted by chazly413 View Post
Interesting. So, then, per williaty's data, would a more ideal AFR lead to a higher g/rev?
No.

I have consistently measured increased airflow on my car with the hybrid, once the MAF scaling was corrected to read "true".




And WTF is that thing in the first post? Some kind of condom for Darth Vadar?
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Old 10-10-2010, 11:01 PM   #13
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Quote:
Originally Posted by williaty View Post
And WTF is that thing in the first post? Some kind of condom for Darth Vadar?
It's a K&N "Apollo" filter setup. Primarily made for racing applications on vehicles where no aftermarket intakes exist or a different filter location is needed because of modifications.

Essentially some dryer hose with a cone filter on the end.
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Old 10-10-2010, 11:06 PM   #14
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no, but, you already bought it, so, too late.
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Old 10-11-2010, 08:22 AM   #15
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Oiled filters have a tendency to coat the MAF I world go with an AVO panel filter and any exhaust you like the sound of, you're not making power of any usable level so it really is about the note
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Old 10-13-2010, 11:14 AM   #16
kansai104
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i m wondering, i dont attach the black hose...is it ok???
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Old 10-13-2010, 11:38 AM   #17
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Quote:
Originally Posted by kansai104 View Post
i m wondering, i dont attach the black hose...is it ok???

If you just run straight to the filter?
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Old 10-13-2010, 11:54 AM   #18
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o_O that hybrid hose looks pretty decent (chaz)... how does it run? any MAF issues?
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Old 10-13-2010, 03:27 PM   #19
chazly413
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Quote:
Originally Posted by iRazor View Post
o_O that hybrid hose looks pretty decent (chaz)... how does it run? any MAF issues?
It runs great. You can feel a little more kick at the higher RPMs. No MAF issues.
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Old 10-13-2010, 09:29 PM   #20
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that intake will make you run too lean without a tune.
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Old 10-13-2010, 10:29 PM   #21
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Quote:
Originally Posted by archdude View Post
that intake will make you run too lean without a tune.
Could go either way, actually, depending on exactly how it's laid out.

A better way to say it would be "With that intake, you need a tune.".
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Old 10-16-2010, 11:50 AM   #22
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Why don't you just leave it stock? I had a 2.5i before I got a wrx. The 2.5i is slow as s**t and not worth dumping any money in. Keep it quiet and stock. It's just going to be loud and slow now. There is a reason they don't make the AP for the NA cars anymore. The gains are nearly nothing.
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