The new Toyota GR Yaris and GR Corolla are impressive performance machines straight from the factory, but that doesn’t mean there isn’t room for improvement. In fact, tuners have found the 3-cylinder engine in the Toyota GR hot hatches to be extremely tunable. To show you exactly how to safely increase the performance of your new Toyota GR hot hatch, the guys at Motive Video have created a comprehensive tuning guide.
Motive Video is an Australian YouTube channel that focuses on aftermarket tuning for performance cars. They are well known for their Toyota GR Yaris build which allowed them to push their small sedan from stock to over 500 horsepower. Motive Video also set the record for the fastest GR Yaris on the drag strip with a record time of 10.8 seconds.
All that experience pushing the limits of the GR Yaris platform means the Motive TV crew knows a thing or two about tuning Toyota’s new turbocharged inline-3. The all-new G16E-GTS is a 1.6-liter turbocharged inline-3 that produces 268 horsepower (200 kilowatts) and 273 lb-ft (370 Newton-meters) of torque in the GR Yaris. For the larger Corolla GR, the G16E-GTS produces 300 horsepower (224 kilowatts) and 295 lb-ft (400 Newton meters) of torque.
The G16E-GTS might be awesome in stock form, but a few simple mods can unlock even more power from that inline-3. The Motive TV team noted that they noticed many inconsistencies in their GR Yaris’ test rig. They think it’s because the GR Yaris works hard to make sure its all-wheel-drive system doesn’t overheat. The stock GR Yaris ECU would also introduce inconsistencies like adding an artificial red line during pulls or timing the pull at the upper end of the rev range.
With the unique quirks of the Yaris addressed during the dyno runs, the team was able to identify the modifications that are worth your time and money. The easy-as-a-melody mods are definitely worth the investment and add a noticeable amount of power. Modifications like an intake or exhaust didn’t add any noticeable power, but added some noise that’s missing on the production car.
Approaching higher power levels, the only mechanical issue the team found on the G16E-GTS was the stock valve springs. Valve float was noticed at higher rpms after the tune was added, a stronger set of valve springs were added to compensate. While adding the valve springs, you can also add new performance camshafts, which is exactly what the team at Motive TV produced a dramatic performance boost.
As the build continues, the mods keep piling up until you hit over 500 horsepower in the tiny GR Yaris. What mods would you add to your GR Toyota hot hatch?