I can only boost 18psi on a stock ECU right? I am just trying to make sure. I heard 18psi is the highest you can go without fuel cutoff.

18psi = 1.241054

AND IF I DO BOOST MORE THAN STOCK WILL I FEEL ANY DIFFERENCE??
MY so far mods are a HKS SSQV and an SPT Intake and a Boost Controller

 

dude, first off the bov needs to go since their is no gains and just makes the car runs rich between shifts. also, you should really take the car and have it tuned to safely run higher boost and to safely run your BOV and intake if you do decide to keep them.

 

You will hit boost cut before 18psi depending on your altitude. You're going to break your car if you don't get a tune. Manual Boost Controller =broken car for you. Buy an accessport, get a tactrix cable, or get an ecutek, but don't just crank up the boost. The other post is right. BOV is a cop caller and will make your car run worse.

 

How about you just put the stock BOV and get rid of the boost controller and spend money on something that will benefit you. Exhaust, dp/catback, rear sway, ALK, uppipe or engine managment to name a few.

 

you've been told son! hahaha just playin

 

 

then tell me if a BOLT on DownPipe without a whole exhaust system will make a difference??

 

the aftermarket downpipe replaces two restrictive cats in the exhaust system. the aftermarket up-pipe also replaces a cat. it's these cats that are the biggest restriction, not the diameter of the exhaust system itself so much.

I agree, search around about BOVs and you'll find they're bad for subarus. this is spoken from personal experience as well

Also, you can't just put on a boost controller and crank up the boost, it doesn't work that way. your car has to be tuned via some form of engine management, which could cost you as little as a $100 cable if you can learn how to tune it yourself.

 

not exactly true, the BOV has to be tuned in order for them to work properly, the only thing is that there is almost none if any gains from it. thats the reason people advise us to spend our hard earned money elsewhere.

the only time a BOV "hurts" the car is when you just slap one on for the "psshh" sound because it makes the car run extremely rich between shifts.

 

OK! I took off my BOV and put on the stock one. I left the boost controller on but its set to STOCk BOOST because the boostcontroller gives WAYY FASTERR SPOOL UP!!! I get can full boost on 6th gear in no time as for the stock boost controller u dont get full boost until 5,000rpm. I also have a SPT Genuine INTAKE

I CANT BELIEVE HOW MUCH BETTER SPOOL I GET FROM THE HALLMANBOOST CONTROLLER THEN STOCK. BIGGGGG DIFERENCE!!!

 

SO are you saying that the DOWNPIPE will replace BOTH of the CATS? Because really the downpipe is all i wanted. I never wanted to change the exhaust

 

He has an STi, it already comes with a catless uppipe. Get engine management, Cobb's Accessport. It will be the most beneficial tool for your car. If you have intake and a get an aftermarket downpipe you most definetly want engine managment or you could end up having a bad case of boost creep.

 

So far from your first post you have ALL the wrong mods. Do you read the forums much? And by the way kudos for taking off the BOV, but you're still not done reversing the damage yet. MBC should go, and probably the spt too...but I suppose thats the best evil out of them all. The SPT is going to make you run a little rich and you are going to be sucking in hotter air from the engine bay...you just got rid of your cold air intake.


Pick up a cobb access port and a titek downpipe and a catback of your choice and you will be a happy camper, I guarantee it.

 

nah im okay. im just too happy about the spool up sound. its SUPER GREAT!!

 

so are you saying that if you have a aftermarket DOWNPIPE then it wont work well without an COBB AP 2 or Engien Management??