2011 Bolt-ons and what to expect? - Subaru WRX Forum
 
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#1 Old 08-24-2011, 09:43 PM
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2011 Bolt-ons and what to expect?

So I am a complete noob to the scene but have long been interested and am now finally able to get my subaru (big boy job...lol)!. I am planning on getting the 2011 WRX and wanted to know what I should expect out of the following mods (or even if they will work in conjuction...I think they will but who knows, I am a noob):

K&N Cold Air Intake
Cobb catback exhaust
Cobb Access Port


Those are basically what I'm starting with, and was hoping for maybe 20 hp gain from the two of them combined; is that reasonable?, and what would a tune net me w/ just those parts. I was also considering a Cobb downpipe but was a little paranoid about not passing inspection. I know I wont be getting this from bolt on's alone but I have a goal of about 340 whp after I've been putting more money into my car. I plan on getting my WRX in about 2 months time and can't wait to get crackin!

Thanks for any and all advice,
thepants
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#2 Old 08-24-2011, 10:00 PM
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If you are using a Cobb accessport to tune your car. Then you might want to use a AEM Intake or a Cobb SF Intake. Seeing as how those are the only two intakes that Cobb supports. Otherwise the K&N CAI will probably make your car throw a CEL. Which you would need a custom Cobb pro-tuned map to run a K&N CAI correctly. Eh...just research and read a lot before you jump to fast. The Cat-back exhaust won't do much beyond make a difference in sound. You'd have to go Stage 1 with the intake map or get the Downpipe and go Stage 2 with 93 octane. Which you'll love...

Hint: If you run a 93 octane map.....that means you have to run 93 octane and your engine makes more power.

Kirt
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#3 Old 08-26-2011, 04:56 PM
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The 2011's respond very well to the Stage 1 from Cobb. To me, the Stage 2 seems unneccesary for the little bit more HP and TQ you get. Take a look at Cobb's dyno. Going from Stage 1 to 2 only gained 3 HP and 17 pounds of torque. That doesn't seem worth the risk of emissions failure or warranty troubles.



http://accessecu.com/dyno/graph.php?...rgb3=000153000

If I was getting a 2011 WRX I would go with the following.

Cobb Cold Air Intake
Cobb catback exhaust
Cobb Access Port Stage 1

You'll be very happy with that.

2005 WRX Cobb Stage 2
2009 Outback
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#4 Old 08-26-2011, 05:26 PM
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Sadly....I bet the butt dyno notices the 17 ft/lb of torque difference.

Kirt
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#5 Old 08-29-2011, 07:29 AM
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Well after some more research, I think I'll be going with the AEM CAI, the Cobb Access Port, and the Cobb Catback exhaust.

I had one other question, on the topic of downpipes. I really want to build my car up with the eventual goal of having big numbers on hp/tq. I am nowhere near compitent yet but as I learn, I will eventually want to go with forged internals and bigger injectors and a bigger turbo and such. With that in mind, for the downpipe is it reasonable to get a catd downpipe or does it only make sense to get a downpipe w/out a cat in it? How drastically is the performance effected by the cat? And will I be able to pass emissions etc?

Thanks again,

I'm just tryin to do all the research I can before I really start working on it.

Thepants!Laugh!
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#6 Old 08-29-2011, 09:43 AM
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4-5 hp difference. Get the catted one.

Paul
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#7 Old 08-29-2011, 10:28 AM
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Yeah, its not as big of a restriction as the actual top part of the OEM Down pipe (DP). It kills a little bit...but normally 5 or less hp if you run a Catt'd DP. I'd rather burn unspent fuel and keep the back of my car a little cleaner with the CAT.

Kirt
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#8 Old 08-29-2011, 10:33 AM
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Well. I just spoke with my subaru dealer and was told I couldn't order a 2011 because it's too late at this point and that instead I'll be waiting until pricing starts for the 2012. I was told by the salesman that they will be essentially the same car with different paint options but will I be able to use the bolt ons that I've been looking up for the 2011 model?

I hope so :-/ what do you guys think?
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#9 Old 08-29-2011, 10:50 AM
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Who did you talk to? Faulkner? The parts should match up...I doubt they will redesign the wheel yet without letting us all know about it.

Kirt
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#10 Old 09-06-2011, 02:51 PM
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Ahh, sorry for the slow reply. I just moved to the Harrisburg area and was talking to my previous dealer Steve Moyer Subaru in the Reading PA area. I have a VIP program discount through my job and Steve Moyer Subaru will match that and take off another 2%. I haven't spoke with any dealers in the Harrisburg area quite yet.

One question I have about the Cobb Accessport in regards to using the AEM specific tune. If I want to take the car back to the dealer for w/e reason, can I reload the stock tune and be ok? In other words, if I did that, would everything read out clean (for warranty reasons of course)?
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#11 Old 09-06-2011, 03:07 PM
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Just use the revert back to stock option and take off the intake. When you're taking the car back to dealership.

Kirt
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#12 Old 09-06-2011, 03:51 PM
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Depends on what you are taking it in for? They aren't going to scan the ECU for oil changes or even transmission replacement. They really have to look for a change in tune on the ECU and most dealerships aren't going to waste the time.

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