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APR

APR ECU Upgrade - 4.0L GT3 (991.2)

4.0L H6 Engine Tune for the Porsche 911 18-19

Part # ECU-40L-9912-GT3 Be the first to write a review

APR ECU Upgrade - 4.0L GT3 (991.2)

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Suggested Retail
$2,699.96
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7

Emissions

This part is legal under the provisions of EPA’s Tampering Policy dated November 23rd, 2020.

See Emissions Details
We're excited to announce our Engine Control Unit (ECU) Upgrades are now available for the Porsche 911 GT3 (991.2) 4.0L engine with the Bosch MED17.x ECU! Expect excellent gains with up to 519-551 HP with 360-377 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 519-551 HP with 360-377 FT-LBS depending on octane
  • Max gains of +33-69 WHP and +37-52 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
  • Flash counter does not increase with each flash
  • Free lifetime updates
  • Direct OBDII port flash (No ECU removal)
  • 30 day money back guarantee
Brand APR
Emission Code7
Engine AspirationNaturally Aspirated
Engine ConfigurationH6
Engine Displacement4.0L
Engine FamilyPorsche 9A1
Engine OrientationLongitudinal
Fuel TypeGasoline
Install TypeAPR Dealer (Software Price Shown)
MarketNAR
ROW
Product TypeECU Upgrade
Part NumberECU-40L-9912-GT3
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.
Important fuel quality information
Important fuel quality information
Find your boxcode and revision
Find your boxcode and revision
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. Please Note: Each vehicle's year, make, and model may have multiple factory engine or transmission controller software part numbers, known as box codes, each with unique revisions. Manufacturers periodically release software updates that alter this information, which can only be determined by scanning the controller and is not publicly provided. Due to the variety of codes, some stages, octane levels, features, or options may not be available for specific codes. Therefore, our website provides a general guide based on general info such as Year, Make, and Model. Our system allows you to request unavailable software, and we offer a 30-day money-back guarantee if you're not satisfied.

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    Porsche Tech Talk

    APR ECU Upgrade Stages

    Our ECU Upgrades are available in multiple configurations. Installation of additional performance hardware, such as an intake system, may provide further performance improvements.

    APR Stage 1

    The APR Stage 1 ECU Upgrade is the first step towards tuning your engine. It produces up to 519-55 HP and 360-377 FT-LBS of torque with gains as high as +33-69 HP and +37-52 FT-LBS of torque at the wheels.


    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.

    Horsepower and Torque Dyno Charts

    Select a DynoSelect a Dyno Type
    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

    StageHPTQMax GainMax Gain
    Stock As Reported by Porsche 500 PS 339 FT-LBS
    Stock As Measured by APR 493 HP 350 FT-LBS
    Stage 1
    91 AKI / 95 RON519 HP 360 FT-LBS +33 HP +37 FT-LBS
    93 AKI / 98 RON528 HP 364 FT-LBS +42 HP+41 FT-LBS
    100 AKI / 104 RON531 HP 366 FT-LBS +48 HP +42 FT-LBS
    104 AKI / 108 RON534 HP 367 FT-LBS +55 HP +43 FT-LBS
    E60-E85551  HP 377  FT-LBS +69  HP +52  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.

    The APR Difference

    Who we are - We’re a global automotive engineering firm nestled in Opelika, Alabama. Our 80,000ft² state-of-the-art facility is home to some of the best engineers in the industry, who have mastered hundreds of engine management systems. We have multiple engine and chassis dynos, and the resources necessary to create our ECU Upgrades in-house, from the ground up! We're not a new company either. We've been around since the 90's and we have a strong financial backing to ensure we'll be here to support you for decades to come!


    What we do - We optimize everything to make your engine more powerful. We adjust air-fuel ratios, advance ignition, increase boost pressure, alter cam positions and lift profiles, and more, all depending on the type of engine and management system, of course! We don’t take shortcuts, and we don’t take risks. We do it the right way.


    How we differ - With our proprietary calibration and direct ram access data logging tools and operating system code changes, we’re able to make some of the strongest and fastest ECU upgrades, without needing costly end user adjustments. We work with the ECUs intelligent modeling and closed-loop systems, and beta test in multiple environments to create upgrades that work no matter where you drive!

    APR Software Pricing Guide

    Our performance software upgrade is available in multiple stages with optional features.

    APR Stage 1
    APR Stage 1 ECU Upgrade $2,999.95

    Purchasing, Guarantee, and Updates

    Purchasing Options¹: Locate an APR Dealer. They will physically install software on your vehicle at their location. Alternatively with the APR Remote Tuning Service (RTS) you'll purchase an APR Tuning Cable and we, or a participating dealer, will remotely install software on your vehicle†.


    Money-Back Guarantee: Try our Software Upgrades for up to 30 days, risk free! If you are not satisfied, 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


    1. Availability: APR Software may not be available for all vehicles. Stages, programs, and features may not be available for all ECUs.
    2. Money Back Guarantee: Excludes some Software Upgrades, such as those included with a hardware purchase. Labor charges are at the discretion of the installer.
    3. Free updates: Subject to availability. Labor charges are at the discretion of the installer. Applicable to the original purchaser. Second hand owners may inquire with an APR Dealer about a software license transfer fee.
    †. Remote flashing: Excludes APR Plus. Excludes some platforms. Dealer participation will vary. Visit our product page for details.
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