OhBoyKittens

Motoman, on youtube, did an episode on both the tt and tts. He said the tts has a larger turbo but produces less boost. The tt is like 17 pounds of boost right? Can anyone explain this to me? and, how big is the turbo on the tts?

adg44

They both boost to the exact same PSI. The turbo is larger on the TTS motor, as well as different internals to handle the extra power. It also has additional radiators and a larger intercooler.

z06user

Here are the specs on the turbos:
GTI vs R Engine Differences - GOLFMK7 - VW GTI MKVII Forum / VW Golf R Forum / VW Golf MKVII Forum
Turbo specs:

MK7 Golf GTI 2.0T EA888 Gen 3
IHI
6/6 Blade Billet Compressor Wheel & 8 Blade Turbine Wheel
42.5 mm Inducer / 54.0 mm Exducer - Compressor
46.8 mm Inducer / 50.4 mm Exducer - Turbine

MK7 Golf R 2.0T EA888 Gen 3
IHI
6/6 Blade Billet Compressor Wheel & 8 Blade Turbine Wheel
45.2 mm Inducer / 58.0 mm Exducer - Compressor
47.4 mm Inducer / 54.7 mm Exducer - Turbine

The Golf R/S3/TTS uses the IHI IS38, the GTI/TT/A3 uses a smaller IHI turbo.