Does anyone have a Boostvalve MBC on their WRX. How long to install and is there any directions for it (on the net). My buddy wants to sell to me. Plus what is a safe boost to run with stock internals. I just have an intake and GFB BOV. Thanks

 

Thanks, but now you both have me confused. Does anyone else have this done to their WRX or does anyone else have an opinion on this. I would think that 15.5 is not be an unsafe jump from 13.5, but then again I am not, by anymeans, a WRX expert.

 

i have a K&N filter, and a boostvalve MBC. it doesn't take long to install.. but if you have the universal (like i do) it takes a little tweaking. but it's basic and simple. make sure you look over direction and stuff, so you know what goes to what and why. i'm boosting like 1.2 bar in 4th... when you're adjusting your boost, don't go buy the boost from 1st and 2nd. go by 3rd or 4th. because if you're boosting at like 1.1 bar in 1st or 2nd, you're going to hit like 1.4 in 4th... WAY TOO MUCH... car trips out and your check engine light comes on. but man you can really feel a difference, it's awesome.

 

I have a boostvalve mbc on an otherwise stock (for the moment) wrx. First, I think the boostvalve is a great and economical mbc. Second, insure that you install it correctly. I'm running about 15.25 psi in third and hit 16psi in fifth under load. Which is all fairly conservative. One thing I can say is DO NOT set your boost to 1.2 bar in fourth (or any gear for that matter) as Toekneepark suggests. 1.2 bar is equal to 17.4 psi! You do not want to do that to an otherwise stock turbo and engine. .1Mpa=1bar=14.5psi so 1.1bar = ~16psi. You really don't want to go over that, although if you're pulling 16.5 in fifth once in a while I think your probably okay. Remeber, it's always good idea to start conservatively.

Also, I have two brass valves (I bought at Home Depot) and some vacuum tubing that I hooked up so I can turn my boostvalve on and off, running my mbc or my stock boost controller. Until I install my uppipe later next week I really don't want my wife driving the car with the mbc on (she does a lot of long distance commuting). I don't want her to have to worry about watching the boost gauge and ptfb conditions (which will happen, so I do suggest getting a catless uppipe as soon as possible).

The directions that come with the boostvalve are pretty good. You can also look around on the forum and find a ton of resources. One thing I did notice though is that the boostvavle dirctions tell you to source the vacuum line from over by the blow-off vavle (post intercooler) rather than at the compressor where the stock boost controller is sourced. I did it this way and it works well. I even asked Ric at boostvalve.com why he suggests doing it this way and he gave me a very technical answer as to why he chooses to hook into the vacuum line after the intercooler. It made sense to me. I can't remember the specifics exactly but I have them in an e-mail somewhere.

Anyway, a boostvalve mbc is a great way to go, but be careful! Used improperly or foolishly it is a great way to blow up your engine.

Goodluck!

 

Thanks guys. You all have been a great help. I have come to the conclusion that I am going to take all of your max boosts that you are running and take the average. Should be safe. Haha

 

from what i've been hearing, i hear 16 is the safiest... i'm running about 17 in 4th... i hope everything will be ok...

 

My friend who's giving it to me has a 1.8T. If he gets too much boost, his computer send him into a limp home mode. Do our cars have the same type of thing, or do we just get a check engine light?

 

it might if you go TOO much. but if you stay at 16 you should be fine. if anything DOES happen... most likely you'll get a fuel cut off and check engine will come on. just turn down the boost a bit, and wait for the check engine light to turn off. it'll turn off, mine turned off the next day.

 

can you tell me how to install the MBC?
with pictures better
hehe
thanks