BrenTuning 2021+ BMW M1000RR Stage 1 Flash
US and European model M1000RR’s have been restricted from the factory with the US models having worse restrictions than it’s European counterpart. Stage 1 was developed to remove these restrictions and unlock your M1000RR’s full potential.
WHAT’S INCLUDED IN STAGE STAGE 1?
- Derestricted Throttle
- Derestricted Exhaust Valve
- RPM Limiter Raised
- Better Fueling
- Heat Management
HOW DO WE ACCOMPLISH THIS WITH STAGE 1?
THROTTLE RESTRICTION – Giving you the ability to utilize 100% of the throttle is paramount in track situations where you need all the power you can get on demand. The factory file has “dead spots” that may cause the M1000RR to behave in an unpredictable manner when corner exiting. This also means any kind of straight line acceleration also suffers. We remove these factory restrictions to ensure a smooth and predicable throttle, all the way to redline.
EXHAUST VALVE – The exhaust valve is a double edged sword. It does good by making back pressure when needed but also hinders the 2021+ M1000RR from making the most power possible at mid to upper RPM ranges. The valve closed makes the bike a lot more quiet than if it were open. Even slip-on exhaust sounds almost the same as stock due to this valve closing so much. Opening this valve for racing use allows for some horsepower gains, as they are gear and RPM dependent. Just like the butterfly valves for the throttle. Lower gears will reduce sound and power by 3-5HP by opening the valve less then 100%, even in high RPM’s. Our mapping still utilize the stock exhaust valve to give you maximum power but also opens it up when you need to make peak power gains and the sound you want.
RPM LIMITER – The stock RPM limiter is set to 15,100 RPM. We have been testing 15,300 RPM with zero negative side effects. The M1000RR’s factory configuration actually varies in RPM from gear to gear, something we haven’t seen in BMW till now, but have seen in Ducati for quite some time. We set the RPM limiter for 15,300 RPM in all gears.
FUELING – The 2021 BMW M1000RR fueling is rich for exhaust gas temperature purposes but it’s complete overkill. It is also set artificially lean at idle, cruise, and warm up, which results in stalling and cold/hot start issues. The new M1000RR is factory equipped with 5-wire widebands (just like the 2020+ S1000RR) and is very precise on targeting a specific AFR (Air/Fuel Ratio) through a closed loop corrective system from idle to redline. Being factory rich also helps it cool the turtleshell exhaust system. However, fuel can be trimmed for better result as it targets real time fuel corrections (think Dynojet PC5 Autotuner but better). Luckily this is the death of the piggyback fuel controller and custom dyno tuning. We program the M1000RR to target a better AFR (Air/Fuel Ratio) to make a little more power along with fixing drivability and idle.
HEAT MANAGEMENT – Let’s face it, this bike rides a little on the hot side. Due to the new exhaust system and idle/cruise AFR mixtures the bike is a recipe to being constantly in the 215+F range and burning your legs while you ride, making it uncomfortable anywhere you’re not going 50+MPH. We have solved this issue by adding our low fan temp modification to this flash as a standard baseline feature along with different cruise mapping which has curbed temps extensively.
BENEFITS
- 10HP gain in top end RPM
- 2-4hp from exhaust valve management
- Cooler riding temps
- Warm up stalling issue resolved
- Improved throttle response in all gears
- Longer and smoother powerband
- Better exhaust note (as bike is silent stock due to exhaust valve)
For more information check: https://brentuningmoto.com/product/2021-bmw-m1000rr-stage-m/
