http://www.grimmspeed.com/catalog/product_info.php?cPath=151&products_id=165 $99.99 Over 250 Way Adjustable Heavy Duty SST Dual Ball Detent System (Clicks with each turn for active feedback) Laser Etched Scale and Labels (Easy to read and repeat precise adjustments) Extra Long Travel Spring (ONE spring, no need to switch Springs) Superior Range without Sacrificing Resolution (0-60 PSI Capabilities with Ultra-Fine adjustments) Universal Mounting Solution CNC'd From Weapons-Grade 6061 Aluminum (Incredibly Durable and Ergonomic) Welcome to the next evolution of boost control, The GrimmSpeed Manual Boost Controller. Introducing the most refined Manual Boost Controller available on the market. Our Manual Boost Controller allows you to raise the OEM boost levels in a quick and efficient manner. Adding the MBC will result in Increased Horsepower, and Increased Torque. This is the first of its kind with technology utilizing over 250 adjustment points that lock in place using a heavy duty stainless dual ball detent system. An extra long travel spring gives you superior range unmatched by any other manual boost controller while maintaining a high resolution, not some vague guess at where to set your boost. Don't trust the life of your engine to trial and error, rather pinpoint your setting using our rising scale running the length of the controller, lock and load. CNC’d from weapon’s grade 6061 Aluminum and laser etched our MBC will outlast your vehicle! The GrimmSpeed Manual Boost Controller redefines precise control and will promise you the results you demand. We are bringing on the revolution, it's what you can expect from GrimmSpeed™
We'll have these ready for pick up later this week. Otherwise i encourage everyone to check out our group buy on nasioc for these. Mike
How does it compensate for partial throttle boost? You should probably make note somewhere about how dangerous this is to run on a stock-ish car. (subaru) For any other kind of car, this actually looks like an awesome alternative to anyone else.
Here is a preliminary draft of our FAQ we will be posting. An MBC can be great on a Subaru with proper tuning. Hopefully this clears up any questions. GrimmSpeed Boost Control FAQ I've heard that GrimmSpeed's Boost control Solenoid is FTW. Why do I want a GrimmSpeed electronic boost controller? While the stock boost control system operates adequately, it can lead to problems at higher-than-stock boost levels. Since the bleed system is sized for the stock turbo at stock boost levels, it is typically incapable of correctly metering air at higher boost, allowing the wastegate to see pressure and open before intended. Additionally, since the wastegate is never completely cut off from seeing compressor pressure, it can open at low boost levels and inhibit boost buildup. With the GrimmSpeed 3 port solenoid, drawbacks of the bleed-based system are thus eliminated, with the wastegate seeing literally no pressure when the solenoid is energized, to seeing all of the compressor pressure when the solenoid is de-energized. Now able to explicitly control the opening and closing of the wastegate, the ECU is able to control boost with greater precision and reduced response time. What makes the GrimmSpeed boost control solenoid better than others? It's a direct bolt on affair. It plugs into the OEM wiring harness and is matched perfectly to the ECU's solenoid driver. It utilizes the fastest acting solenoid available (manufactured specifically for GrimmSpeed by MAC, a leading solenoid manufacturer) Will I get spikes with an electronic boost solenoid? Spikes are possible if your tuner is too aggressive with the wastegate duty cycle ramp up maps. Your tuner can eliminate these spikes. Is the GrimmSpeed boost control solenoid best for me? We recommend the solenoid to 90% of customers. Its more responsive than OEM, provides superior boost control and a solid boost curve and its a really nice upgrade. Why would I want a manual boost controller over a 3-port boost control solenoid? A manual boost controller can be more responsive than an electronic boost controller. For some applications, this can lead to even faster spool up. Also, your tuner may have a strong preference in tuning a manual boost controller. We generally recommend this solution to people spending a lot of time on the track. Why do I want the GrimmSpeed manual boost controller over other manual boost controllers? Aren't they all just a simple threaded ball and spring? The GrimmSpeed utilizes an extra long spring and has a large adjustment range. This allows you to make small incremental adjustments but still have a 0-60psi range without the need to swap springs. The dual ball detent system and linear scale makes it easy to track your boost settings. Each setting has positive click feedback. And the unit is properly designed in house and built to last. We've seen alot of inferior designs out there. I've heard that you can have part throttle full boost (PTFB) when using a MBC, what is that? Without the control of an electronic boost controller, a turbo has the capability of creating full boost at partial throttle positions. Why is PTFB a concern? When your car is at part throttle, you can be operating in closed loop. When the ECU is in closed loop, it is trying to operate at a stoichiometric A/F ratio (without proper tuning). You can't safely run the stoichiometric A/F ratio at any sort of higher boost levels or you'll get detonation. So I can't run a MBC? A tuner can adjust your map so that you will only go into closed loop when PTFB is not possible. This portion of the map can be adjusted to ensure safe A/F ratios. Are there any drawbacks if I am tuned for an MBC? You may see a small increase in emissions and a drop in fuel economy on average since you will not be in closed loop as often. What is a hybrid setup? A hybrid setup utilizes both a manual boost controller and an ECU controlled electronic boost control solenoid in parallel. It eliminates the limitations of both an electronic boost controller (slightly slower boost response when tuned to prevent spike) and a manual boost controller (inability to limit boost in closed loop partial throttle conditions). What is the drawback to a hybrid setup? It takes a little more knowledge and time to properly set it up. And you have to buy two boost controllers. Thanks, Chad
