First of all, I'm am not a liar. I had my ECU flashed by AL, and it works very well.
Second, he told me an MBC is not necessary because he programs the ECU for certain boost levels and disables the boost taper. All I know is that my boost reaches 1.55 Bar ~ 22.78 psi and holds @ ~ 19. The car runs really well. Now Al if you read this, jump to this thread

https://www.evolutionm.net/forums/sh...=239326&page=2

I don't understand why you would use an MBC when the ECU does a very good job of controlling boost. Maybe if you're running much higher, but for just going 22 ~ 23 psi on an IX, i don't see why it's necessary according to what you had told me anyway... Please help clarify ? thanx!

 

Okay, seems Al is very busy! Anyone care to tell my what is the benifit of an MBC when you can flash the ECU to nearly do the samething ? All I heard is that if you want to run higher boost like 24 psi, and race gas. But what i don't understand is, why can't you just flash your ECU to run 24 psi & 100 Octane when you're at the track, then reflash back to 93 for your normal driving (using your laptop with ecuflash) ?
I still don't understand the need for an MBC for most upper 11 & low 12 IX cars running 93 Octane only...

 

I would really appreciate some clarification on this point too. I have Al's flash on my IX with a TBE and no MBC. With so many conflicting opinions around I can't figure out if this a safe or effective set up or not. Especially since Al is now talking about good boost control on IX's requiring removal of the restrictor pill.

 

Exactly! I mean, basically the MBC takes the place of the pill, and you control how much via open vs. closing. Okay, if you remove the pill, and it's all the way open now, and the ECU controls the boost, what is the MBC for ? Only reason I can see an MBC is that you control the boost manually and flash the ECU to allow this and also allow boost up to whatever PSI (i mean within reason now, don't take me literal here), mods, type of fuel you are using, and dial in a death at the track.
In other words, i can set my boost to 10 psi for just cruising around town to help my mileage, i can turn it up to 21 on a friday or saturday night, and if i'm really serious, turn it up to 24 or 25 psi and fuel up with 100 Octane at the track. If you're not going to do all these things, then an MBC is pointless. The ECU controls the boost very well and since the boost taper is removed, it holds to redline very well. Maybe you can tune your car better with and MBC for optimal results... optimize your maps, timing to a certain area of the spectrum at a certain psi controlled by the MBC. All i know is, IX's without MBC's and with are pulling the same times. I read a guy pulling high 11's low 12's and no boost controller. Another with a boost controller boasting about 12.30... so what's the glitch here? Someone chime in that's experienced with this and help out! thanx!

 

This forum seems to address this topic well also:

https://www.evolutionm.net/forums/sh...light=solenoid

 

your answers are in the first link you posted above, why ask again???

 

Yes, but it still seems people are using an MBC on there IX and for what ?
"I'm running 22 psi and it tapers to 19 or 20"
well, so am I !

And i don't have to mess with an MBC. Still points back to the question. Why buy an MBC when Al, Jestr or whomever that knows what they're doing, can program the ECU to control boost ...

 

MBC is good so you can fine tune the boost and have end user control

The current level of ecu flash and pill removal does a very good job of boost control

I prefer a MBC

 

Al, I have your mail in flash on my IX. Do I need to remove the pill?

 

for most people that dont tune their car themselves- if they go to the track or anything they can still add in race gas and hop up the boost to 24psi or so and get away with no other changes- unless you know how to tune yourself you cant do these things with stock boost solenoid

 

Agreed! I think that is the main reason behind the use of MBC.

I tried both and prefer the MBC for end user control.

 

I prefer MBC as well. It has been much more predictable and consistent. YMMV.