Terra clean good practice?

[Delboy]

Does anyone know what the third option shown does on the terraclean link posted.

It claims to be a system for cleaning DI engine like the fsi engines.

Even if it does, where does all that crap go, if it loosened a big lump of carbon that would have to go past the valves get compressed during compression stroke then fired out the exhaust and then meet the cat's???

I do think mechanical cleaning is the only sensible way to go and I may invest in a setup to blast the posts in mine.

It also allows the access to determine the health of the change over flaps at the same time.