i just got a perrin maual boost controller on my all stock 02 wrx except for bov. and i turned the boost up to 9lbs. good. then to 11 went down to gandy to check it and engine light came on and it seemed like it would bog. is that fuel cut? or what never experienced it. so i drove down to racetrak and twiest down a notch to 10 lbs. ran good then. any 1 kno what i was experienceing? runs good at 10 lbs. engine light still on though. oh yea and i just got a perrin drop in filter upgrade. next best thing to cai i think.

 

that first pic was an accident.

 

did your car cut out after a certain rpm? or was the check light on after you put it up to 11. my car had boost cut afetr my new dp but then i got a snowman tune and its dialed now

 

Wow. You need to do some research on nasioc.com before you go playing with a MBC on a stock WRX...

Also BOV?? come on now

 

why are MBC and BOV bad for stock wrx? just curious and lazy to search if you kno plz pass the info

 

As far as the MBC goes, It gets really technical. I know it has something to do with Closed and Open loop. I just cant remember off the top of my head.

And the BOV is bad because you car runs lean when the housing opens to dump air. This has been known to stall teh car or even cause engine problems.


But all of this stuff is debated online over and over. I am just giving you my opinion.

- Mike

 

If youre talking about the OL/CL delay in the 04-05s, the 02-03s dont have that problem. MBCs are not completely horrible for the early WRXs. As long as the owner has a boost gauge to watch for over-boosting and part-throttle/full boost conditions it shouldnt hurt anything. Granted, some sort of EM is much better, but as long as you know what youre doing you can avoid problems.

 

after i installed the bov, it felt better between shifts and also im gettin a tune after i get the turboback exhuast and the engine light came on after it bogged but i turned the boost back down now it runs good at 10lbs. cpages i got a plan for it all and the bov was a deal so is it still gay to have a bov wit a tune? i mean i was really only askin what are the sypmtoms of fuel cut? btw no boost spiking. stays at 10 all day. ty every1 for opinions.

 

hey cpages thanks for info on nasioc and talked to snowmann, im turnin boost down now and gettin tune next month.

 

Its not that you run lean, in fact you'll run rich when it dumps. Since the MAF has already measured the amount of air that has passed it and the sends the correct amount of fuel to hit the target A/F ratio. Dump the air to the atmosphere (instead of recirculating it back into the turbo inlet) and the car goes pig rich (since theres no air...just fuel). Sometimes it causes stalling, more than likely you shoot fireballs. If you must have the sound, there are aftermarket BPV's out there than can hold increased pressures. Combine it with a CAI and you'll get all the sound you'll ever want or need. FWIW: the stock one is good up to any amount you'd be running on the stock turbo.