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this may be a stupid question but my subaru is kinda of a DD soo im learning, plz dont flame me but im going to get a boost controller here pretty soon and was just wondering how much boost a stock wrx can handle. im guessin 13 psi. i have an AEM intake and a cobb tuned ecu if thats anything to consider thanks for any imput

 

from what i remember.. aem intakes on wrxs are awful.. and boost controllers arnt any better.. your car should be tuned to run more boost and not just turned up with a controller

 

hey Blackz, a stock 02-05 WRX is 13.5 PSI. I wouldn't use a boost controller to increase it...Chances are u r going to blow something up. If it is a Cobb Tuned I assume u have an AP (Accessport) in hand correct? Another thing is an AEM intake is not reccommended at all for CAI. unless your car is properly Dyno Tuned it can throw off your MAF sensor (Air/Fuel) mixture and can fry your rings. And yes that would be just because of an Intake. You can't treat a Subaru like you would a Honda, it is a completely different breed...VEry Very sensitive to any mods, especially a boost controller and intake upgrade.

My suggestion is to get a TBE (Turbo-back exhaust) and upgrade your ECU using your AP to a stage 2 Map. If you have a Cobb tuned ECU u should know what I mean...If not, I'm sure one of us here can help. I just hate seeing another Subaru in our Dealership costing $$$ to fix when the money can go elsewhere...

 

Oh BTW, I know it isn't your first post, but WELCOME

 

yes, boost controllers and aem intakes are probably the worst things you could possibly do to your wrx

 

Wow are the aem intakes that bad? I have a buddy who just bought a car that has one on it. Should I give him my extra factory air box?

 

honestly you should, they have a bigger diameter, they allow more air past then the MAF is reading...wrxs run pretty lean as it is...

 

they are good to up to 400hp so stock is still good..

 

I know that. I just didnt now if I should tell him to switch it out or not.

 

If you already have an AccessPort the next thing you should shop for is a used downpipe. They go up for sale on this forum pretty frequently. I think that nets the biggest gains on a stock car. The rest of the exhaust is good, too if you can afford it. Subaru's can turn up their own boost if you have the right map programmed into it. Boost controllers do more harm than good.

 

The MAF is so close to the airbox that changing the way air swirls or gets turbulent as it enters your intake can affect the readings.

 

I think the 400hp is just for the airbox and panel filter. You can replace all the crappy accordian hoses without changing the airbox.

 

iirc he has the aps????? i would imagine that would suck in easier then the stock

 

ok kool

jsut to clarify things. i baught the car as is. i kinda knew that the intakes were bad on this car and i've been shoping around for a stock air box and **** sooo im not all that stupid ; ) and thanks for the info that kinda cleans things us. I talked to the previous owner about his mods and he said that he had the cobb ecu but he dosent have the software for it anymore soo that kinda sux but i think i will jsut upgrade to the second stage ecu and do a full exhaust and buy a stock air box! he mentioned that he brought it to this super good mechanic and he knows everthing about subarus sooo sry to say but he was very wrong. i hate buying cars from stupid people. hahaha thanks again everyone

 

o i c

 

250whp with intake issues.....

 

reply

im not sure if your reffering to yourself as the mechanic but i hunted down the guy that did the work and he didnt really seem like he understood that you cant jsut throw an intake on this car but w/e i guess. and when i said i didn't have the software i ment i dont have the access port. i remember when i talked to the previous owner he mentioned somthin about them but i think he was tryin to say he didnt have it and that kinda sux seeing that they are 600 bucks... i will call him up one more time see if i cant hunt that little thing down and then do the exhaust this spring woo hoo im pumped!

 

hmm

im pretty sure its not because he mentioned somthing about the accessport tuner but he had missplaced it or dosent remember where it went. i didnt have much of a clue on what he was talking about till i looked it up later that day i just never called him back about. soo i guess im out 600 bucks.

 

stock intake

on another note does anyone know where i can find a stock intake ??? : )

 

Make a thread in the WTB forum, im sure there is a handful of people who have them laying around.

 

yes Bikerboy was kind enough to give me a good price on a stock airbox for my friends STI. Who under poor advisment of his friend put on a no-name cone intake and tossed the stock one. Needless to say it runs much better now.
I had multiple replies within a few hours of posting a WTB

 

I was talking to him more to the ability of stock intake... and also qouted your ? about giving him teh stock stuff.. so basically just putting that fact out there.. not being a smart ass

 

so what does removing teh filter have to do with teh stock box not flowing.. if when you removed the filter the problems went away??? Maybe thats why the hoses sucked together cause the filter was restricting after it causing the hose to collapse..??

 

so i talked to the previous owner the other nite and he said he had the ecu tuned for this kind of intake sooo is it still risky or should i jsut be on the safe side with stock intake?

 

You can either buy an AP or get a Tactrix cable, because you will want to change your mapping to take full advantage of any new exhaust parts.

 

Funny, my stock ran Rich, when it was stock...

 

I too am somewhat rich. That's why I get 18 mpg! lol Better safe than sorry tho!