Product Description
**THIS MODIFICATION IS FOR EXISTING CUSTOMERS ONLY. IF YOU HAVE NOT BEEN DIRECTED TO THIS PAGE BY BRENTUNING MOTO, DO NOT BUY. WE WILL CHARGE A RESTOCKING FEE.**
BRENTUNING MOTO IAT RELOCATION AND FLAPPER KIT
As many of our customers know, our IAT (Intake Air Temperature) Kit for the 10-19 BMW S1000RR has been extremely popular and shows noticeable gains on the street and even dyno. This IAT strategy was first used by Dinan (BMW) in the 1990’s. However, the 2020 S1000RR included some serious changes and required a new strategy for this project.
New for 2020 is our Intake Flapper Mapping. The 2020 S1000RR now has flappers in the intake tract, these flappers only allow a small amount of air to pass through to the engine until 6000 RPM when the flappers finally open. When the flaps aren’t open it allows for stagnant, hot air to raise IAT readings and block air flow to the engine. Hot air and low airflow equals less power. This is why we developed our IAT kit years ago. The flapper mod is an add-on progression to the new model. We developed a whole new IAT relocation kit as the harness that has changed from the 10-19 models. All parts fit very snug and are made from billet aluminum for weight consideration and longevity.
The new airbox “flapper” design was made to reduce engine noise at low RPM’s. Instead of the previous foam restrictor that we saw in the 17-19 models, the 2020 S1000RR almost completely closes off the airbox in certain scenarios. This lack of airflow leads to very high intake temperatures. The ECU’s strategy is designed around this “heat soak”. Timing retard is based on a “per gear” and “per RPM” strategy and will not taper off until higher gears due to the airflow and RPM needed to open the flappers. This is vastly different than previous years and more similar to the BMW GS1200’s (which also benefited greatly from this kind of relocation). The first half of the throttle angles (0-50% throttle, commanded) and first three gears are heavily timing retarded on the stock calibration. This is due to hot and stagnant air that sits in the airbox while the flappers stay closed. The design of the OEM flapper servo creates an unnecessary bottleneck of airflow inside the airbox at higher speeds. This distributes air to the inner most cylinders, negating performance and the maximum “ram air” effect the factory airbox can provide.
Our kits have been installed and successfully tested with positive reviews on the street and track! The bike doesn’t feel as lazy from a dead stop anymore. The induction noise is superb after the install and compliments the essence of what a S1000RR should sound like; a true race bike. The IAT Kit allows for consistent power at all RPMs and gears instead of waiting for higher gears to get additional, rated power. During our testing on the dyno and per gear / per RPM datalogging, we found many delays in the factory ignition to combat the heat soak the factory airbox flappers create. With our flapper mod and relocated IAT sensor, the bike reacted sharp from a dead stop and in lower gears / speeds (pre-6000 RPM cruising) without knock detection.
Getting a true ambient temperature from the front of the bike is much better than getting temperature readings from its original location on top of the engine with the flapper doors shut. Idling at the starting line, pits or at a street light on a 100 degree day will put the bike into a temperature protect mode and pull power out to “save itself” until the IAT sensor reads accurate ambient air temp once the bike starts moving. True ambient temps help the bike deliver more power and stay consistent in racing conditions. We are not tricking the sensor but simply allowing it to read proper temperatures of the outside air.
To see real world results of this, please see our video below
WHAT DOES THIS KIT DO?
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- Relocates the Intake Air Temp (IAT) sensor and opens the intake flappers 100% of the time (through software).
- Moves the IAT sensor from the factory location near the cylinder head to the front of the bike to get a true ambient reading.
- Opens factory airbox flappers to allow fresh air to enter the airbox at any speed, RPM or gear.
- A true ambient reading means more power but also means consistent power.
- Noticeable improvements in stop-and-go traffic, starting a race from a stop and exiting the pit.
- More air to the engine with plastic flappers opened.
- No downside and dyno proven gains across the powerband (see dyno chart below).
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WHAT’S INCLUDED?
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- New Mapping To Open Intake Flappers 100% of The Time The Bike is Running
- (1) IAT Extension Harness
- (1) Billet Aluminum Plug For Original IAT Sensor Location
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DYNO PROVEN
IAT 110F vs. 60F test with and without removing airbox flaps and IAT relocation (tested on a 55F ambient day). Bike used was a 2020 S1000RR using our stage 1 flash with exhaust and 93 octane fuel on all runs.
As noted previously, the 2020 has airbox flappers that stay mostly shut, feeding no fresh air and heatsoaking the bike’s airbox below 6000RPM. The stock calibration has compensated as a result. This is a back to back run after only relocating the IAT to the nose of the bike instead of its standard location. This is much different than previous years ECU strategy. We converted it back to previous years strategy to optimize performance.
As you can see both runs, before and after IAT install, have the same exact AFR (air/fuel ratio). It’s a common misconception that IAT modifications adjust fuel. They do not do that. This bike is fully closed loop and hits our commanded lambda target every time due to BMW’s OEM wideband oxygen sensor technology. You can see pretty steady HP gains across the entire RPM range. Converting it very similarly to a 2015-2016 style S1000RR airbox (derestricted years). While the dyno graphs show gains, results on the street or track are actually better when you are hitting higher speeds and it creates a more noticeable ram-air effect.
**Testing performed with 93 octane pump gas. Usage of a lower octane will yield lower overall power.**
This video demonstrates the difference from factory stock, our flash with intake flappers open only, and our flash with intake flappers open and IAT kit for the BMW S1000RR. This is the exact same motorcycle in all videos with temperature comparisons, showing the effectiveness of both the kits working together.
IAT RELOCATION AND FLAPPER INSTALLATION VIDEO
Total install time: 2 – 2.5 hours
Only watch the first part for IAT Kit install as the intake flappers will be opened through software
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