Unlike our competitors, we pride ourselves on our extensive testing and transparent test results. For *complete* RCF tuning results please refer to our RCF tuning blog for the most complete and transparent dyno testing ever conducted on the RCF/GSF platform!

RR Racing is proud to make history again by being the first to offer an ECU reprogramming for Lexus RC F engine control unit (ECU). The Lexus RC F ECU is a very complex and sophisticated engine management system. RR Racing has been developing this upgrade tune with weeks of testing, intimately understanding RC F ECU's parameters and structures, testing various changes to optimize power and torque effectively while retaining stock fuel efficiency, knock control sensitivity, and other built in safety features. During the development and testing period, we have logged many track hours and hundreds of miles of road testing and road-dyno logging with many more hours spent on a sophisticated Dynojet dyno at a top-notch climate-controlled facility.

We had done most of our development on the road, under real world conditions, doing hundreds of runs, datalogs, and hundreds of miles of testing between re-maps in order to determine how the ECU reacts to changes and adjust learning parameters. We have developed a full understanding of the following ECU functions/parameters, including but not limited to:

• Direct Injection / Port Injection fuel mapping
• Ignition control (RC F has base ignition maps, cam timing dependent ignition maps, knock correction maps)
• Intake and Exhaust variable cam maps
• Torque to throttle mapping (allows us to enhance throttle response)
• Raise the speed limiter

Our on-road impressions are that the RC F pulls much more smoothly and linearly, with excellent midrange torque improvement you can definitely feel and appreciate.

After extensive road dyno and datalogs, we headed over to top-notch climate controlled Dynojet testing facility and conducted many hours of dyno tests.

Note results below showing Full Bolt on and tune gains vs stock on e30 blend fuel:



Note: Results below reported with "SAE Correction" and read lower than "STD correction"

For a more recent RCF dyno testing results, please refer to the following News Article:
http://blog.rr-racing.com/news/2022/01/13/dyno-testing-the-latest-mods-on-lexus-rcf/

Ordering Procedure

For a more recent RCF Dyno testing information, please read this article:

• Please select this product and chose all required options as follows:
• PPE Headers: if you would like to order header, please go to the header product, and select this tune as an option.
• Ceramic Coating: we recommend adding ceramic coating for thermal insulation
• Manifold Gaskets: we highly recommend installing new Lexus manifold gaskets
• Please select the chosen shipping for us to ship you back the ECU (please contact us if the desirable shipping is not available). Please note that if you are ordering PPE Headers as an option, select the best shipping for headers and let us know in notes how do you want us to ship you back the ECU (e.g., priority, overnight, etc.).
• After placing your order on our on-line store, you will get an email with shipping instructions and our shipping address.
• After we receive your ECU and reflash it with the chosen tune, we will ship it back as per option you selected.

We recommend reading our technical tuning blog for more useful information about tuning.

Important Disclaimer
RR-Racing cannot ensure the applicability of manufacturer's or third-party warranties after performing this modification. Likewise, RR-Racing does not provide any warranty, written or implied, to the engine or drivetrain of your vehicle. RR Racing is not responsible for any accident caused by the use of our products and ECU upgrade -- our products are intended for race track use solely at purchaser's risk. By buying this product, you agree to the terms of this disclaimer.

Other FAQs:

Do you recommend aftermarket intakes?
We do not recommend any aftermarket intakes that remove the factory airbox. The only recommended intakes are intakes pipes like our RR-Racing Intake pipe, or equivalent.