OVERVIEW
We're excited to announce our Engine Control Unit (ECU) Upgrades are now available for the Porsche 911 GT3 RS (991.2) 4.0L engine with the Bosch MED17.x ECU! Expect excellent gains with up to 539-577 HP with 362-380 FT-LBS of torque on tap, depending on octane, from this simple software upgrade. Our new suite of 4.0L ECU software comes after months of extensive research and development that is typically absent from the aftermarket. Our upgrade makes the engine more powerful and more exciting with added features. We've extensively calibrated the system to work flawlessly on the track, while retaining safety routines to protect your engine in the most demanding scenarios.
Features:
- Delivers up to 539-577 HP with 362-380 FT-LBS depending on octane
- Max gains of +33-77 WHP and +39-58 WFT-LBS depending on octane
- Supports 91 AKI, 93 AKI, 100 AKI, 104 AKI, and E60-E85 fuel grades
- Ethanol support from E60-E85 for maximum performance
- Standing RPM limiter set to 7,000 RPM
- Engine RPM limiter set to 9,000 RPM
- Speed limiter matches max gearing
- Exhaust flaps recalibrated to provide better low-end performance
- No hardware required (Software only)
- Supports standard bolt on modifications
- Free lifetime updates
- Direct OBDII port flash (No ECU removal)
- 30 day money back guarantee
SPECS
| Brand | APR |
|---|---|
| Emission Code | 7 |
| Engine Aspiration | Naturally Aspirated |
| Engine Configuration | H6 |
| Engine Displacement | 4.0L |
| Engine Family | Porsche 9A1 |
| Engine Orientation | Longitudinal |
| Fuel Type | Gasoline |
| Market | NAR |
| ROW | |
| Product Type | ECU Upgrade |
| Part Number | ECU-40L-9912-GT3RS |
EMISSIONS
7
This part is legal under the provisions of EPA’s Tampering Policy dated November 23rd, 2020. The company has reasonable basis (test results) to verify that this product allows the vehicle to operate within legal emissions standards and is therefore legal to be sold for on-street use in all states that accept the legal provisions of the Clean Air Act and the EPA Tampering Policy. This product is NOT LEGAL FOR SALE OR USE IN THE STATE OF CALIFORNIA. Testing with the California Air Resources Board, in order to achieve 50-state compliance, is pending with CARB. Once testing is complete with California, and an E.O. number is issued, this product will be updated to 50-state legal status.
Only use fuel equal to or higher than specified. Never use a lower octane fuel. Always follow our fuel guide, especially with race fuel and Ethanol, where available. Dynos are for reference only. Results will vary. Contributing factors include the vehicle condition, vehicle setup, dyno type, dyno setup, environmental factors, fuel quality, and more. When describing fuels, the North American Region (NAR) uses the Anti-Knock Index (AKI), (RON+MON)/2, or (R+M)/2. The Rest of the World (ROW) uses RON. RON is Research Octane Number and MON is Motor Octane Number.
PORSCHE TECH TALK
APR ECU UPGRADE STAGES
APR’s ECU Upgrades support various octanes both with or without any hardware modifications. Each stage is fully compatible with an upgraded intake, exhaust, or other minor bolt on modifications.
- APR STAGE 1
The APR Stage 1 ECU Upgrade is the first step towards making more power! This simple upgrade requires no engine hardware modifications, and produces 539-577 HP with 362-380 FT-LBS of torque, depending on octane. Gains as high as +33-77 WHP and +39-58 of WFT-LBS torque are available throughout the power band.
APR Stage 1 is available for 91 AKI, 93 AKI, 100 AKI, 104 AKI, and E60-E85 fuel grades in North America, and 95 RON, 98 RON, 104 RON, 108 RON, and E60-E85 in the Rest of the World.
Porsche Rear Engine Dyno Testing Notes - This engine is extremely sensitive to intake air temperature (IAT) due to the rear engine and rear cooling design. Power figures on a stationary dyno will vary wildly with limited airflow compared to real world conditions. As IAT increases the calibration will intentionally reduce power to protect the engine.
APR CALIBRATION REPORT
| STAGE | HP | TQ | MAX GAIN | MAX GAIN |
|---|---|---|---|---|
| Stock As Reported by Porsche | 520 PS | 346 FT-LBS | ||
| Stock As Measured by APR | 522 HP | 350 FT-LBS | ||
| STAGE 1 | ||||
| 91 AKI / 95 RON | 539 HP | 362 FT-LBS | +33 HP | +39 FT-LBS |
| 93 AKI / 98 RON | 547 HP | 366 FT-LBS | +44 HP | +43 FT-LBS |
| 100 AKI / 104 RON | 558 HP | 368 FT-LBS | +57 HP | +45 FT-LBS |
| 104 AKI / 108 RON | 561 HP | 370 FT-LBS | +61 HP | +47 FT-LBS |
| E60-E85 | 577 HP | 380 FT-LBS | +77 HP | +58 FT-LBS |
Only use fuel equal to or higher than specified. Never use a lower octane fuel. Always follow our fuel guide, especially with race fuel and Ethanol, where available. Dynos are for reference only. Results will vary. Contributing factors include the vehicle condition, vehicle setup, dyno type, dyno setup, environmental factors, fuel quality, and more. When describing fuels, the North American Region (NAR) uses the Anti-Knock Index (AKI), (RON+MON)/2, or (R+M)/2. The Rest of the World (ROW) uses RON. RON is Research Octane Number and MON is Motor Octane Number.
PURCHASING, GUARANTEE, AND UPDATES
How to Purchase - APR Software Upgrades are only available through Authorized APR Dealers. The dealer will connect to your vehicle, and install the update.¹
Money-Back Guarantee - Try our Software Upgrades for up to 30 days, risk free! If you are not satisfied, return to an APR Dealer to have it removed and refunded.²
Free Updates - If we make an update, add a standard feature, or if the manufacturer issues an update, you are entitled to a free update.³
