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APR IS38 Turbocharger ECU Upgrade

engineAPR is pleased to present the OEM Golf R/S3 IS38 Turbocharger ECU upgrade for GTI/A3 platform vehicles!  

The APR Stage 3 IS38 ECU Upgrade is the next step towards making more power! This upgrade requires a factory Golf R/S3 IS38 Turbocharger, an APR Race DP, APR Intake System, and APR Intercooler System and produces 395-397 HP with 334-403 FT-LBS of torque. Gains as high as 170-172 HP and 138-149 FT-LBS of torque are available throughout the power band (210 PS Model), depending on octane and torque level. Optionally a low torque version of this software is available that puts less stress on the factory clutch. To run the high torque version of this software, and APR TCU Upgrade may be required on 6 Speed DQ250 DSG/S Tronic Models. To get more power, the vehicle can be outfitted with a catback exhaust, turbocharger inlet, and various other bolt-on modifications all without requiring any new modifications to the ECU.

APR Stage 3 IS38 is available with either the factory exhaust crackle, where available, or a more aggressive “Pops and Bangs” exhaust crackle on most ECUs. This more aggressive option lengthens the duration of the exhaust crackle, increases the volume slightly, and operates in more modes, such as lifting off the throttle and changing gears. This is only enabled in sport/race modes and will automatically disable should exhaust and component temperature become too high.

APR Stage 3 IS38 is available for 91 AKI, 93 AKI and 104 AKI fuel grades in North American, and 95 RON, 98 RON and 108 RON in the Rest of the World.

Please Note: APR recommends using colder heat-range spark plugs (Ex: NGK-R7437-9), properly gapped to a tighter gap (Ex: 0.024" ±0.002" or 0.6mm ±0.05mm), properly installed and torqued (Ex: Per the manufacturer's specifications), and maintained with a shorter changer interval (Ex: 10,000-15,000 mi or 16,000-24,000 km). Before using Race Fuel, educate yourself and follow our switching guide. Lastly, vehicles with engine code DBL, or with a factory GPF or Gasoline Particulate Filter, an upgraded APR HPFP is required.

Dyno Testing
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APR Calibration Reports
Stage NAR Fuel ROW Fuel Max HP Max TQ Max HP Gain Over Stock Max TQ Gain Over Stock
- APR recommends and tuned with Sunoco GT 260 for 100 AKI mode and Sunoco GT 260 Plus for 104 AKI mode. Never use lower octane than specified by the mode.
- Max increases are based on APR's actual measured stock values and not those reported by VAG. | RON = ROW Fuel Grades | AKI = North American (RON+MON)/2 Fuel Grades.
- Reported wheel figures measured on APR's in house Mustang Dyno with a US Spec 2014, 2017 and 2019 MK7 GTI 6MT, using SAEJ1349 correction and an average of multiple runs. Crank figures are estimated based on the measured wheel figures. Results may vary depending upon environmental conditions, vehicle, transmission, vehicle health, operating conditions, temperatures, fuel grade, dyno type, dyno setup, other variables and other modifications.
Stock As Reported by VAG 91 AKI95 RON 210 PS 258 FT-LBS    
Stock As Measured by APR 93 AKI98 RON 236 HP 274 FT-LBS    
APR Stage 3 IS38 Low Torque 91 AKI 95 RON 395 HP 334 FT-LBS +172 HP +138 FT-LBS
APR Stage 3 IS38 Low Torque 93 AKI 98 RON 395 HP 334 FT-LBS +172 HP +139 FT-LBS
APR Stage 3 IS38 Low Torque 104 AKI 108 RON 396 HP 340 FT-LBS +172 HP +140 FT-LBS
APR Stage 3 IS38 High Torque 91 AKI 95 RON 395 HP 376 FT-LBS +170 HP +140 FT-LBS
APR Stage 3 IS38 High Torque 93 AKI 98 RON 396 HP 385 FT-LBS +170 HP +142 FT-LBS
APR Stage 3 IS38 High Torque 104 AKI 108 RON 397 HP 403 FT-LBS +170 HP +149 FT-LBS
APR Calibration Reports
Stage NAR Fuel ROW Fuel Max HP Max TQ Max HP Gain Over Stock Max TQ Gain Over Stock
- APR recommends and tuned with Sunoco GT 260 for 100 AKI mode and Sunoco GT 260 Plus for 104 AKI mode. Never use lower octane than specified by the mode.
- Max increases are based on APR's actual measured stock values and not those reported by VAG. | RON = ROW Fuel Grades | AKI = North American (RON+MON)/2 Fuel Grades.
- Reported wheel figures measured on APR's in house Mustang Dyno with a US Spec 2014, 2017 and 2019 MK7 GTI 6MT, using SAEJ1349 correction and an average of multiple runs. Crank figures are estimated based on the measured wheel figures. Results may vary depending upon environmental conditions, vehicle, transmission, vehicle health, operating conditions, temperatures, fuel grade, dyno type, dyno setup, other variables and other modifications.
Stock As Reported by VAG 91 AKI95 RON 220 PS 258 FT-LBS    
Stock As Measured by APR 93 AKI98 RON 247 HP 277 FT-LBS    
APR Stage 3 IS38 Low Torque 91 AKI 95 RON 395 HP 334 FT-LBS +158 HP +128 FT-LBS
APR Stage 3 IS38 Low Torque 93 AKI 98 RON 395 HP 334 FT-LBS +159 HP +128 FT-LBS
APR Stage 3 IS38 Low Torque 104 AKI 108 RON 396 HP 340 FT-LBS +159 HP +130 FT-LBS
APR Stage 3 IS38 High Torque 91 AKI 95 RON 395 HP 376 FT-LBS +157 HP +129 FT-LBS
APR Stage 3 IS38 High Torque 93 AKI 98 RON 396 HP 385 FT-LBS +157 HP +131 FT-LBS
APR Stage 3 IS38 High Torque 104 AKI 108 RON 397 HP 403 FT-LBS +157 HP +138 FT-LBS
APR Calibration Reports
Stage NAR Fuel ROW Fuel Max HP Max TQ Max HP Gain Over Stock Max TQ Gain Over Stock
- APR recommends and tuned with Sunoco GT 260 for 100 AKI mode and Sunoco GT 260 Plus for 104 AKI mode. Never use lower octane than specified by the mode.
- Max increases are based on APR's actual measured stock values and not those reported by VAG. | RON = ROW Fuel Grades | AKI = North American (RON+MON)/2 Fuel Grades.
- Reported wheel figures measured on APR's in house Mustang Dyno with a US Spec 2014, 2017 and 2019 MK7 GTI 6MT, using SAEJ1349 correction and an average of multiple runs. Crank figures are estimated based on the measured wheel figures. Results may vary depending upon environmental conditions, vehicle, transmission, vehicle health, operating conditions, temperatures, fuel grade, dyno type, dyno setup, other variables and other modifications.
Stock As Reported by VAG 91 AKI95 RON 230 PS 258 FT-LBS    
Stock As Measured by APR 93 AKI98 RON 264 HP 279 FT-LBS    
APR Stage 3 IS38 Low Torque 91 AKI 95 RON 395 HP 334 FT-LBS +134 HP +109 FT-LBS
APR Stage 3 IS38 Low Torque 93 AKI 98 RON 395 HP 334 FT-LBS +134 HP +110 FT-LBS
APR Stage 3 IS38 Low Torque 104 AKI 108 RON 396 HP 340 FT-LBS +135 HP +111 FT-LBS
APR Stage 3 IS38 High Torque 91 AKI 95 RON 395 HP 376 FT-LBS +133 HP +112 FT-LBS
APR Stage 3 IS38 High Torque 93 AKI 98 RON 396 HP 385 FT-LBS +134 HP +114 FT-LBS
APR Stage 3 IS38 High Torque 104 AKI 108 RON 397 HP 403 FT-LBS +127 HP +135 FT-LBS

The APR Development Difference

DirectPort ProgrammingAPR DirectPort Programming:
APR’s DirectPort Programming is now available! Any APR Dealer in the world, connected to the Internet, has direct access to APR’s latest ECU upgrades for loading directly over the vehicle's OBD-II port. This completely eliminates the need to remove and open the ECU for currently available files and can be uninstalled at any time!

APR ECU ExplorerAPR ECU Explorer:
APR’s proprietary ECU Explorer gives APR’s Calibration Engineers unparalleled access to the vehicle’s entire engine management system. Typical commercially available data logging tools, used by most tuners, only allow logging up to 12 engine-operating variables at extremely low data rates. These tools are also limited to a small, specific list of variables. APR’s ECU Explorer is capable of logging every variable found within the ECU with far more variables logged at once, at very high data rates.

APR ECU ComposerAPR ECU Composer:
APR’s proprietary ECU Composer is used for altering the engine management system. With full access to every table, map and variable within the ECU, APR’s Calibration Engineers are not limited to a handful of maps as is common for most tuning companies.

APR ECU AssemblyAPR ECU Assembly:
APR’s Electrical Engineers have the ability to alter the code structure of the ECU. Through code levels changes, APR's Engineers are able to add features to the ECU. Other changes allow higher torque limits than those achievable through only modifying calibration data or using piggyback devices as is the case for many tuners. This allows APR's engineers to often not require transmission software to meet or exceed advertised gains. On the highly modified end, this often allows APR to make turbo upgrades operate without the need for external manual controllers.

Requirements and Recommendations

APR’s IS38 Turbocharger ECU Upgrade is sold as software only. The factory turbocharger necessary for this upgrade is conveniently available at various APR dealers and VW, Audi and Seat dealerships across the world.

  • Turbocharger:
    An unmodified, OEM IHI IS38 Turbocharger is required. APR recommends using the latest factory revision 06K145722H as of Oct 20th, 2015, or newer. Replace all factory one time use nuts, bolts, gaskets, and crush washers. The wastegate may need to be adapted after the install. A tutorial can be found here: IS38 Wastegate Adaptation.
  • Intake:
    The APR Carbon Fiber Intake System is required.
  • Exhaust:
    The APR Cast Race DP System is required.
  • Intercooler:
    The APR Intercooler System is required.
  • HPFP:
    Vehicles with engine code DLB with the GPF or Gasoline Partiulate Filter require a HPFP upgrade.
  • Spark Plugs:
    APR recommends using colder heat-range spark plugs (Ex: NGK-R7437-9), properly gapped to a tighter gap (Ex: 0.024" ±0.002" or 0.6mm ±0.05mm), properly installed and torqued (Ex: Per the manufacturers specifications), and maintained with a shorter changer interval (Ex: 10,000-15,000 mi or 16,000-24,000 km).
  • Transmission:
    The APR IS38 TCU Upgrade may be required to run the high output software.
Application Guide
Vehicle Market Engine Transmission
Audi A3 - MK3/Typ 8V All 2.0 TFSI EA888 Gen 3 All
Seat Leon – MK3 / Typ 5F All 2.0 TSI EA888 Gen 3 All
Skoda Octavia / vRS – MK3 / Typ 5E All 2.0 TFI EA888 Gen 3 All
Volkswagen Golf GTI – MK7 / Typ 5G All 2.0 TFI EA888 Gen 3 All
Volkswagen Jetta GLI – MK7 / Typ 5G All 2.0 TFI EA888 Gen 3 All

Please Note: An APR Dealer MUST check software availability and compatibility before purchase.

Pricing
Stage Minimum Requirements Price
IMPORTANT PRICING AND AVAILABILITY DETAILS:
- Pricing: Please contact an APR Importer for pricing outside the USA.
- Availability and ECU Compatibility: Stages, programs, and features may not be available for all ECUs.
- ECU Revision Notice: Multiple ECU revisions exist for each platform. APR software may be temporarily unavailable when factory updates are applied. An APR dealer can check availability in person, or over the phone if the ECU boxcode/revision is known.
APR IS38 Turbo ECU Upgrade - Existing APR ECU Upgrade Customer OEM IHI IS38 Turbocharger (See Requirements and Recommendations Above)
 
Buy Now$699.99
APR IS38 Turbo ECU Upgrade - New Customer OEM IHI IS38 Turbocharger (See Requirements and Recommendations Above) $999.99

How to purchase

APR DealerPlease use the APR Dealer Locater Tool to locate an APR Dealer, confirm availability and schedule an appointment.

Please note vehicle manufacturers issue many ECU part numbers and revisions throughout their vehicle lineup. As such, some ECUs may be temporarily unavailable as new parts and/or revisions are released. If the vehicle’s ECU part number and revision is known, availability can be checked at any APR Dealer.

warningWARNING: Cancer and Reproductive Harm. For a list of APR part numbers associated chemicals, go to https://www.goapr.com/prop65/. For more information, go to www.P65Warnings.ca.gov.

APR Tuned

Phone: (800) 680-7921 Local Phone: +1 (334) 502-5181 Fax: (334) 502-5180 Address: APR LLC, 4800 US HWY 280 West, Opelika, AL 36801

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Notice: Products that affect emissions and do not carry a California Air Resources Board Executive Order are not for sale in California, USA. While we try to keep everything current, APR LLC is not responsible for errors in pricing on this web site. All prices are in USD and are applicable to the United States of America only.
¹APR offers free ground shipping to the lower 48 states for purchases over $100.