First notes on the Tiguan

The Tiguan has been with me [ADD HOW LONG]. Long enough to stop being a car I drive and start being a car I read about.

The reason it’s interesting — more interesting than the family-SUV exterior suggests — is the platform underneath. It’s the same MQB chassis that sits under the Mk7 Golf GTI and Golf R. The same EA888 Gen3 engine. The same DQ381 7-speed wet DSG. From factory it makes 162kW through an IS20 turbo — about midway between a GTI and a Golf R on paper, and not far off in practice, given the weight and the all-wheel drive.

That’s the technical version. The personal version is that I bought a daily and ended up with a project car.

The questions I’m starting from

A list of things I want to understand, not in any order:

• How the IS20 actually works under load — where it’s efficient, where it falls off, what the realistic ceiling is before you start trading reliability for power.
• What an IS38 swap actually involves on this chassis vs. on a Golf R, where it’s a much more documented path.
• Whether a Garrett Powermax is a sensible next step for someone who values daily-driver reliability over peak numbers, or whether it’s overkill for the use case.
• How much real-world difference a 3-inch downpipe and a bigger intercooler make to the IS20 before any tune.
• What suspension changes preserve the DCC adaptive damping modes — coilovers that talk to the factory module, not against it.
• How to service the DSG myself, properly, on a routine shorter than the factory’s.
• How to read and clear codes confidently with OBD11, and what the warning signs are when a code is a symptom of something deeper.

The shortlist for the next month: the DSG service kit, properly understanding what the existing fault codes mean (there’s a camshaft timing-related one I want to trace down), and a clean baseline log of the car as it sits.

The point of writing this down

I’m writing this because I’ve noticed that every time I learn something about the car I forget half of it within a week. The mechanics happen on weekends; the forgetting happens on weekdays. So this build log exists to keep what I learn, in roughly the order I learn it.

It’s also a deliberate counter-direction to the car-content I usually see online — the rolling-shot montage, the “here’s my new mod, smash that subscribe button” cadence. None of which actually tells you anything useful about how a platform works.

I’d rather have an honest paragraph than a slick video.

What the next entry will probably be

[ADD — whatever the next concrete piece of work or learning is. Don’t promise too much; just point.]