The IHI IS20 is the stock turbocharger found on the Volkswagen EA888 Gen 3 2.0T engines (specifically the non-high-output versions found in the MK7 GTI and Audi A3 8V). It is widely regarded as a reliable, quick-spooling turbocharger capable of significant power gains over the smaller IS12 found in 1.8T models. But just how much juice can it add if you upgrade your 1.8T to an IS20? Let's talk about it.
Technical Specs Of The IHI IS20
The IHI IS20 is a 100% direct bolt-on OEM upgrade, utilizing the same factory connections. These specs are generally accepted by enthusiast communities and tuners, though nothing is set in stone. Minor variations can exist depending on the measurement method (e.g., tip-to-tip vs. bore).
- Compressor Wheel:
- Inducer: 42.5 mm
- Exducer: 54.0 mm
- Blade Count: 6+6 (Splitter blade design)
- Turbine Wheel:
- Inducer: ~50.4 mm
- Exducer: ~46.8 mm
- Blade Count: 8 blades
- Bearing Type: Journal Bearing
- Actuation: Electronic Wastegate Actuator (integrated into the housing).
- Max Boost: Efficient up to ~28–30 PSI in the midrange, tapering significantly at redline.
- Power Potential:
- Stock: ~210–220 HP
- Tuned (Stage 1/2): ~300–330 Crank HP (reliable limit).
- Characteristics: Known for instant spool and massive low-end torque (often exceeding 350 lb-ft), but runs out of breath above 5,500 RPM compared to the larger IS38.
Sweet Spot Gains
You'll see a significant bump through the powerband when you upgrade to an IS20. However, upgrading your turbo as a stand-alone mod is limiting its potential. With the IS20 we'd recommend (at a minimum) that you upgrade your downpipe while you're at it. We also highly recommend upgrading the ECU software to get the full potential of your upgrades. Consider ECU software from top brands such as 034 Motorsport, APR and IE.
If you really want to make your IS20 sing, check into an upgraded intake and intercooler, too.
What’s The Magic Number?
If you’re reading this looking for a single, guaranteed horsepower figure that the IS20 will bolt onto your car, the honest answer is: it depends. We can confidently assure you that the seat of the pants feel and the dyno numbers will show a massive, undeniable improvement - especially if you are making the jump from a factory IS12.
Every car and every build is unique. Your final numbers will depend heavily on several moving parts beyond the turbocharger itself. For instance, a car running on premium 93 octane fuel or an E85 blend will yield drastically different numbers than one running strictly on 91 octane. Furthermore, the aggression of your software tune, the overall health of your engine, your local altitude, and ambient weather conditions all play critical roles in how much power your new IS20 can safely generate.
IS20 Turbos From EuroSport Tuning
Instead of getting hung up on an exact peak horsepower number, think about where the IS20 makes its power. This turbocharger transforms the EA888 engine by fattening up the powerband right where you use it most: the midrange. You might not be chasing 500+ horsepower track records, but the surge of torque you’ll feel when merging onto the highway or pulling out of a corner is going to be significantly more aggressive. It’s not just about the peak number at redline; it’s about having a thrilling, responsive boost in usable power delivered reliably every time you put your foot down.
If you're ready to upgrade to the IS20, we've got everything you need. At EuroSport Tuning, we source from the best brands, and we stock the very same performance parts we put on our own cars. Contact us if you have questions about your turbo upgrade - and order today!
