I've heard that all exhausts give pretty much the same hp, so I was wondering if this setup would give me about the same power/times as what Cobb was stating (stage 2) on their website(http://cobbtuning.com/wrx/power-s.html#stage2) and it would all work together.
That is the same exhaust setup that I was planning on exactly. I would really like to know how it works out for you and most importantly how it sounds, because I want things quiet as well, while still getting the HP gains.
sounds awesome 86.. I have the exact same plan as you for my new 05 wagon. please drop me an email when things are complete to let me know how it sounds and works.. !Thumbs Up
AccessPort will only support the mods that the shelf maps dictate. If you have a wrx you also have the option of going "stage 2.5" which is VF30/34 and pinks.
I have the Cobb catted downpipe along with the borla hush catback on my STi, and had just the catback on my WRX before. You WILL know that it has an aftermarket exhaust, especially under throttle. It's not like you're putting on a higher flowing exhaust that will sound like stock. That said, I love the sound of car now, and it hasn't attracted any unwanted attention from the police. (yet, knock on wood)
The downpipe is the most restrictive piece in your exhaust. That's why you gain the most power replacing it. The stock cat-back is not very restrictive.
The only thing a K&N would do is give you a tiny gain in pre-spool performance, and if you are lucky it will make it so you will hit full boost 100rpms sooner.
Your turbo is capable of pulling air through the filter MUCH better than the intake stroke of a cylinder, so the filter is not as much of a limiting factor as in an N/A car.
remember, with an n/a car the engine is sucking "As much air as it can get" and with a turbo it is sucking "As much air as it wants" changing the filter will make it easier to suck the air it wants, but that is a huge difference from an n/a car where it will actually change how much air it can get.
ok i gotta ask a few questions
I know every seems to say cold air intakes are not made good for the Wrx because of the harsh bends the air has to travel thorugh. But if u put one on and u have you're car customed tuned will it make a difference. I went to Speed Technik in Norwalk, CT and i asked to get my car customed tuned with ECUTEK and they said i should get a CAI. I currently have a full APS turbo exhaust, Perrin TMIC and turboxs boost controller. So i was wondering if tunning it makes a difference or should i not get the CAI. And if i do get it do i have to worry about water getting in or it making my car lose power. Also I seem to have a whistling sound coming from my Gauges they are the stock gauges from Subaru. It gets really annoying so if anyone knew how to get rid of it could they tell me.
It is hard to tune for any CAI. If somebody told me to put a CAI on, I wouldn't trust those people because if you know anything about the WRX, it is almost universal that CAI's are bad for the car because they lean it out and they are hard to tune for.
I dont kno what i am goin to do. I might put in the intake. But i am definetly getting it tuned with ECUTEK. But dont u need to take the stock air box out when adding more horsepower. But can u give me any advise with my gauges they make weird whislting noises when u the boost gauge goes over 0.
If you want to change your intake, get a perrin short ram. You won't be happy with a cold air. You won't add any real power to your car by changing the intake system, so it's pretty much for looks and sound. You'll be able to hear the bypass valve, and it looks pretty good with all that polished alluminum under you hood. The stock system is pretty well designed. I got a cold air, and I'm taking it off, as soon as I get some money for a short ram. Don't feel like putting the oem parts back in.
Your gauge make a whistling sound when you boost, you may be leaking, but I don't know how that could happen. Was it always like that? Take it back.
The only thing a K&N would do is give you a tiny gain in pre-spool performance, and if you are lucky it will make it so you will hit full boost 100rpms sooner.
Your turbo is capable of pulling air through the filter MUCH better than the intake stroke of a cylinder, so the filter is not as much of a limiting factor as in an N/A car.
remember, with an n/a car the engine is sucking "As much air as it can get" and with a turbo it is sucking "As much air as it wants" changing the filter will make it easier to suck the air it wants, but that is a huge difference from an n/a car where it will actually change how much air it can get.
Doesn't make sense to me.. If stock intakes weren't a restriction than stock backpressure wouldn't be either. But you get noticeable gains replacing the exhaust. You also get gains replacing the intake manifold.
I would think that an intake would be MORE of a restriction to a turbo'd car, since it's relying on the extra air needed to multiply power output.
Doesn't make sense to me.. If stock intakes weren't a restriction than stock backpressure wouldn't be either. But you get noticeable gains replacing the exhaust. You also get gains replacing the intake manifold.
I would think that an intake would be MORE of a restriction to a turbo'd car, since it's relying on the extra air needed to multiply power output.
The WRX intake is already designed very well, and from what ive learned turbos are very good at sucking alot of air so if there is just a little bit of restriction IE the stock intake, it really shouldnt make much of a difference.
Doesn't make sense to me.. If stock intakes weren't a restriction than stock backpressure wouldn't be either. But you get noticeable gains replacing the exhaust. You also get gains replacing the intake manifold.
I would think that an intake would be MORE of a restriction to a turbo'd car, since it's relying on the extra air needed to multiply power output.
The exhaust is doing much more work than the intake. The intake has the turbo spooling up and drawing air through it. The exhasust has to spin the turbo itself.
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