Important Disclaimer! Please note that if you do not follow the tuning instructions accurately, you may damage the software on your ECU. Once GSF's ECU is damaged, it is not possible ot recover it. You will have to purchase a new ECU at a cost of $1250. When you purchase this product, you agree that the risk of a damaged ECU is entirely yours. RR Racing take no responsibility and provides no warranty in this regards.
Special Note: 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/ GS F engine control unit (ECU). The Lexus GS 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 GS 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 (GS 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 GS 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.
We recommend to read our technical tuning blog for more useful information about tuning.
- 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, we will ship you cable and tuning software. You will also receive an email with a link to a Dropbox folder containing instructions and driver software you will need to install on your Windows PC.
- After you flash your ECU and return the software and cable, we will refund $550 deposit.
RR-Racing cannot ensure the applicability of manufacturer's or third-party warranties after performing this modification. RR Racing is not responsible in an unlikely event that an ECU is damaged during removal or installation. Likewise, RR-Racing does not provide any warranty, written or implied, to the engine or drivetrain of your vehicle. Additionally, certain tuning features, such as removal of check engine light (CEL) triggers may be illegal for road use. RR-Racing provides these ECU tuning services for race vehicles only. RR-Racing does not condone the removal of any emissions related device on vehicles used on public roads. RR Racing is not responsible for any accident caused by the use of our products and ECU upgrade -- our products are intended for off-road use solely at purchaser's risk. By buying this product, you agree to the terms of this disclaimer.
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.