very true, but be stupid to do almost any modification on a late model car without tuning it these days

this is correct Mr. Sun or should i just call you Daniel hehe! but then again, I almost daily hear people talking about doing things to cars without any thought for tuning! Some people just FAIL!

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fail they do, and i see alot of it and unfortunately usually end up fixing it.
although i'm hoping someone has failed with a 05-07 STI so i can buy it

I've been messing around with the ECU mapping(maf scaling) for a while now with my process west CAI. I must admit that I've had to scale down most of the lower flow rates to get a "global" fuel adjustment close to 0. But I've got decapped injectors which can also have an effect on things.

I'm thinking maybe I should swap back to the stock air box to see if I can get the same boost with less wastegate duty cycle, if I can, that would mean the stock airbox is less of a restriction.

I'm starting to believe that there is only a few percent(if any) to be gained with a cold air intake. If that is the case, it would only be worth upgrading to a cold air intake when you max out the flow rate on your stock airbox. Process west now offer a 72mm CAI version(compared to the stock 65mm unit) if you ever get to that point.

If anyone’s interested, I'm at about 330g/sec @ 20psi with an avo450s and the max the stock airbox will flow is 350g/sec. So you would either need to run a lot more boost on a gt28 based turbo or maybe even the same boost on a gt30 turbo to max the stock airbox out.

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GOLD PIG STI

Standard airbox with say an STi Motorsports panel filter etc
and a "resonectomy" should be enough to give you a slight
increase also would be the cheapest option.

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221.7KW-ATW 498.5NM MMS ROLLER DYNO & BUILT BY STi NINJAS, BUILD #318/600

EBISU SUBARU, SHIBUYA-KU TOKYO

Resonectomy will reduce power btw. Only increases noise.

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[COLOR="Gray"]550Nm off a 2L... Just wish it was in the dak dak...[/COLOR]

Ok, glad I didn't listen to Sean before and remove it then.

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221.7KW-ATW 498.5NM MMS ROLLER DYNO & BUILT BY STi NINJAS, BUILD #318/600

EBISU SUBARU, SHIBUYA-KU TOKYO

cheers for the replies, what panel filter should i go for green cotton or k&n?

un-oiled, oil in the filters ruin the AFM

with CAIs...I've heard obviously it is bad to go through puddles/swimming pools and suck up water! but what if you hit big puddles and it splashes up, and your car is not "submerged" - is it okay?

my car is my daily and i'm considering putting a CAI but don't want to get it wet and suck up water!