TFsi TSi engine changes

[gazbutS3]

Just found this elsewhere, a list of the engine changes the new TSi engine has over the Tfsi that we have, its my understanding this is the engine that will be in the mk6 GTi and the Rocco, not sure the list is totally comprehensive

New TSi engine has:
- Name changed from FSi engine (fuel-straight injection) to TSI or Turbo Straight Injection. Same thing different name
- timing chain, no more timing belt
- balance shafts in the block
- pulley/gear/crank multi-piece
- 4 lobe cam with roller follower
- Fuel pump runs off the exhaust cam
- Different layout of the cams in the head
- different tensioner setup at the back of the head
- the new Engine management system med12.5. Much more advanced control strategies and some new surfaces that make calibration so much more powerful!
- Fueling is much, much better for lot's of reasons. More pressure for one, new pump, roller follower and some other stuff...
- variable valve lift in the longitudinally-mounted Audi engines (e.g., A4/5, Q5; but not A3, TT, GTI/GLI/Passat/Tiguan).
- New air intake setup, no more engine cover/airbox combo
- oil filter and oil dipstick relocated
- improved PCV system
- Compression ratio lowered to 9.6:

Its interesting that a few of the things that have been changed are a few of the things we've had issues with, fuel pump & cam, PCV, airbox intake set-up

[bacillus]

And if I understand correctly from revo, it's less tweakable than the earlier Engine management system using a select plus switch.

[WhiteGTI]

Good post Gaz, very interesting to know! 

[Greeners]

Interesting stuff Gaz 

The bad thing is the more we know about the new GTI the more some of us are going to want it! 

[wigit]

and don't forget it comes with acc as well greenhouse, i'm itching to try a mk6 gti now

[Greeners]

and don't forget it comes with acc as well greenhouse, i'm itching to try a mk6 gti now

Is it not the same as you have in your rocco?

[wigit]

yes it has and its not a marketing ploy, if you try it out go on a dual carriageway where its straight and surface is consistent, difference is noticable, in the damp soften it up in comfort and still hangs on well on the twisty bits, question is will it be mk6 or r20t for me

the map gives a bit more torque lower down and i find the pirelli puts it power down better, no doubt this is why the diff is being muted

[Greeners]

Yes I've driven a few rocco's and have been mighty impressed! I think they make a nicer sound than the standard GTI to as the exhaust seems frutier.

[bennylenny88]

the scirocco has a tapping noise that i now know is the chain :)