ashton13

I agree.. thats exactly why I dont have a MBC caus I dont want to touch the turbo. I feel like there is enough boost from the factory... or does the MBC do something else other then turn up the boost?

BADEVO

iTrader: (35)

Dont take this the wrong way but I suggest you use your x-mas cash to get a book on the fundimentals of a turbo charged motor. MBC is as basic a mod as you can do to these cars.

How old are you?

ashton13

Ok, so it seems like a tune and an MBC but I have to learn more about these two mods first. I had a WRX which I ran catless and saw big gains from thats why I asked about the original set up. There are places on the east coast that can reflash. More info on why so many people get the MBC would be great.

ashton13

If its so basic just explain what do does... im 28. I can go to howstuffworks.com if i need to know about how a turbo works.

BADEVO

iTrader: (35)

loL.... I already told you what it does, or did you miss that post?

Turbo Meg

iTrader: (5)

The Boost controller not only allows you to raise or lower boost. It will hold the desired boost closer to redline. The stock boost will fall off as you get closer to redline. On my 05 Rs I would see 20.5psi of boost but it would drop down to about 17.5 at redline. A boost controller will let you hold more boost to redline, as well as limiting boost spike in cold weather.

As a side note my stock boost gauge was off by around 2psi so a boost gauge is a good investment.

Warrtalon

iTrader: (6)

I recommend the exact mods in my sig, which is why I put them there. Your car would be a beast with a Megan downpipe, Megan testpipe, Forge UNOS MBC, Walbro fuel pump and Dynoflash.

However, as the others have been saying, if you don't even know what an MBC is, what it does, or why it's important, then you _really_ have no business doing any mods. You already got an expensive BOV that was not at ALL useful for your mods and will never be useful if you stay at stock boost. Also, if you are avoiding a flash due to warranty reasons, your warranty went out the window with the BOV and will do so even more with the removal of the cat or addition of an MBC. In fact, the flash is the absolute BEST mod you can get for the price and power when maintaining the warranty, because it's not easily detectable, not noticable to the naked eye, and not likely to ever be found or proven...not to mention that with a Dynoflash, you can send your ECU and have it flashed back to stock for free in case you need to go to the dealership for warranty work and are worried.

BADEVO

iTrader: (35)

AMEN...... preach brother preach.

nj1266

iTrader: (6)

There will always be a slight boost taper even with a MBC. This taper will happen with the stock turbo since it "runs out of breath" at the upper rpms. The 16g is a small turbo and loses effeciency in the upper rpms; that causes a slight tpaer in the boost. Some have also mentioned that the flap on the wastegate has a weak spring and at higher rpms stay a bit open causing taper.

So you are right that an MBC REDUCES taper, but does not eliminate it 100%. Ofcourse, there are some exceptions out there.

nj1266

iTrader: (6)

May I suggest a JIC downpipe since it fits the 05 Evos, but you will need to space the lower brace or go with an RMR brace. May I also suggest going with a UR high flow cat instead of catless. It is a FEDERAL srime driving w/o a cat and a smart police officer can smell that you are running catless and give you a nice $1000 ticket.

Please do not get an MBC since you do not seem to know what you are doing. You might blow up your engine if you adjust your MBC poorly.

Get a $200 mail-in flash if you want since it far easier to remove the ECU and send it to AL than to porperly install and dial an MBC. Also, if a dealer sees your MBC, then your warranty is toast. An ECU flash is harder to detect.

Warrtalon

iTrader: (6)

He only said that "it will hold the desired boost closer to redline," which is true. Of course, the boost still tapers, especially after redline (7k), but as he said, an MBC "will hold the desired boost closer to redline" unlike the stock BCS.

Warrtalon

iTrader: (6)

You only suggest the JIC because it "fits" the 05? Are there any that DON'T fit the 05? Also, if you have to space the lower brace or change the brace, then I don't really consider that to be a part that "fits." Is it cheaper than the Megan DP that fits without spacers?

BaLListic_EVO

iTrader: (19)

lol yeah i agree with the book deal there because to me its kinda scary having a person that doesnt seem to get the concept of a mbc twisting the knob of it not know what the results will be. As well as the consequences of raising the boost level... personally i suggest leaving the car stock and live out your warranty....

BADEVO

iTrader: (35)

MEGAN is the best bang for the buck exhaust for the EVO IMO.

nj1266

iTrader: (6)

I am not disagreeing with you or him. I am simply clarifying to the novice poster that there will always be a tapering of the boost with the stock turbo. Since the original poster seems to lack the basics, I did not want the guy to get the impression that there will not be ANY boost taper. That is all. Both of us are correct: an MBC will hold boost way better than the stock BCS, but there will still be boost taper due to the inefficiency of the stock turbo at the top end.