The Next Level of Boost Control. Welcome to the most refined manual boost controller available on the market today. During development, we worked hand in hand with tuners across the country to develop this device and ensure that it solves legitimate problems that they have with other existing boost controllers. The GrimmSpeed MBC allows you to raise OEM boost levels in a quick and efficient manner through superior boost range and ultra-fine resolution (.25 PSI/click). Adding the MBC to your car will result in quicker spool up, quicker response and rock-solid boost control. 4/5 Levi 12th May 2016 Simple MBC to tame a beast Had to purchase this for an emergency install, First point is that GrimmSpeed was able to get it to me the next morning/overnight which was awesome.

Install done on a 2013 Veloster Turbo. The purpose of my purchase was to get a tune under control and I needed an MBC rated for at least 25lbs. While we worked on the maps we were hitting limp mode from overboost conditions so this was used as a safety measure now, and then for a better controlled tune later. Install was simple, not rocket science at all and the video they provide is already all you need.

Feel free to visit my channel and support my video's how they work and how to install one.my first video, feel free to comment these controllers. How a Boost Controller Works. Rpm or a manual switch. Electronic boost controllers require a higher level of technical knowledge to be fitted but offer a. A bleed-type manual boost controller simple mechanical and pneumatic control to allow some pressure from the wastegate actuator to escape or bleed out to the.

There isnt a lot to say other than this was a simple solution with an easy install, and easy to adjust. While they do emphasize the 'clicks' I have trouble both hearing and feeling them, but they are there. I have tested a range of 19.5Lbs to 23.5Lbs and monitored with the TORQUE app, each click is roughly 1/4 of a lb of boost. The MBC feels solid, device is annodized, not painted which is nice. Personally, I wish there was less grafitti on the top. Total install, adjustment, and testing time was about 1 hour. -VSport United- TheGeekFreek.

5/5 John Reynolds 10th Mar 2016 Just as advertised Works just as advertised. Had a TurboXS manual boost controller before and was not half of what the GrimmSpeed boost controller is. When I had the TurboXS boost controller, it was so Inconsistent that I just went back to adjusting my boost by the spring. With this GrimmSpeed boost controller you have great adjustablilty, plus the boost comes on stronger and faster then just running a spring. Great product, one turbo cars have needed for years. Thanks GrimmSpeed. Donizetti Concertino Pdf File there.

OK, I get how the wastegate limits boost by allowing exhaust to bypass the turbo once a certain PSI is reached. What I don't get is how a manual boost controller 'fools' the wastegate into allowing more boost? What is it interfering with? Where does it go (in turbo theory, I'm not asking for install info, )? How and where does the wastegate normally determine boost level anyway? What happens if the MBC is having a bad day and decides that 28psi through a stock T25 would be a fun experiment?

Something's gotta give,. What would it be? And lastly, are MBCs reliable?

Are certain 'types' more reliable than others? I'm looking at the 'Extreme Technologies Manual Boost Controller' for example. I realize that by playing with my engine, I have to accept some risk. I just want to understand what the heck I'm doing to minimize it. I'm just funny that way. With no boost control the stock solenoid regulated the boost. How it does this is with the wastegate actuator on the turbo.

When that reaches the desired pressure the actuator opens the wastegate. How all boost controllers work is they hold the pressure back and they do not allow the wastegate actuator on the turbo open the wastegate until the desired boost pressure.

That's why one of the boost controller hoses goes to the wastegate actuator on the turbo. If your boost controller decided to fail and spiked to 28psi nothing would give as your car would hit fuel cut to prevent the engine from blowing up. It could bust some seals on the turbo but that's not likely. Hope this helps. Click to expand.