MBC users thoughts?
I love my ebc. I can quickly adjust boost from sunday drive to kill. I also have a fail safe for my meth kit tied in that drops boost to wastegate on low/no flow. I find that it holds boost very well.
Mbc is a cheap effective way to go. I'm switching over to GM 3 port ecu controlled. Remember you get what you pay for. I'd rather have something constantly monitoring and controlling my boost for me based on the parameters I setup rather than relying on some spring to do it's job.
Much of the cold weather spiking is due to the spring inside the MBC changing its response as the metal gets colder. My MBC is mounted to the radiator. As the rad comes up to temp, so does the MBC. As such, I see little variance in boost levels - ~.5PSI from 30F-90F according to my logs. FWIW, I can't take credit for the idea. Em, from STM, installed it in that location for this very reason and he was right.
Ecu controlled Boost is great with v7. It has a larger map and gear based boost control 
Evolving Member
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I have MBC mounted to the radiator. Just don't go ape on it right at startup... hell you shouldn't do that to any car!!
It's working great for me.
Why the hate on the little spring!? Even solenoid valves have a spring keeping it shut! You just have a bunch of copper and some spiffy electrons to pull it open instead of pressure hehe
It's working great for me.
Why the hate on the little spring!? Even solenoid valves have a spring keeping it shut! You just have a bunch of copper and some spiffy electrons to pull it open instead of pressure hehe
Step 1. Buy an MBC
Step 2. If don't have an EBC continue to step 5.
Step 3. Remove EBC and install MBC.
Step 4. Smash EBC with a hammer.
Step 5. Install MBC.
Step 6. Enjoy you're car running correctly under load and WOT.
Step 2. If don't have an EBC continue to step 5.
Step 3. Remove EBC and install MBC.
Step 4. Smash EBC with a hammer.
Step 5. Install MBC.
Step 6. Enjoy you're car running correctly under load and WOT.
https://www.evolutionm.net/forums/ec...ecu-boost.html
https://www.evolutionm.net/forums/ec...-solenoid.html
https://www.evolutionm.net/forums/ev...led-boost.html
paid 60 bucks for my 3 port. my mbc is for sale...
https://www.evolutionm.net/forums/ec...-solenoid.html
https://www.evolutionm.net/forums/ev...led-boost.html
paid 60 bucks for my 3 port. my mbc is for sale...
Evolved Member
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From: South Beach, FL / Miami, FL / Pt. St. Lucie, FL / NYC
Interesting debate I must say. 
Last edited by DBallz; Nov 6, 2009 at 10:20 AM.
That can be the case if one has his EBC programmed such that it is active prematurely. The idea in programming an EBC is to keep the solenoid closed until just before the point where boost needs to be controlled. If it is clicking along in unboosted regions, this will delay spool to some degree, especially where an unecessarily weak WG spring is used.
The limitation in the solenoid duty vs. rpm table is the onset of boost vs. rpm is different in different gears. This is where either load limiting or pressure limiting boost control strategies prove their worth.
The limitation in the solenoid duty vs. rpm table is the onset of boost vs. rpm is different in different gears. This is where either load limiting or pressure limiting boost control strategies prove their worth.