difference between Turbo FSI & TSI engine

[Teutonic_Tamer]

brilliant engine the 2.0tsi! loads of torque! yes it is the new MED17ecu and we're also the first people to do switchable software for it

Carl, without giving away any "trade secrets", what is/are the difference between the MED9-series and this new MED17 ?

[Teutonic_Tamer]

I just have official press access for all of the VAG marques (including the "big boys" - Lambo, Bentley and Bugatti), and also pay for erWin technical info too.  The erWin stuff aint cheap though!  :embarassed:  Oh, I also have ETKA, but keep that quiet! 

Aha!
I don't know what ETKA means, but since it is in such small font, it must be something really special! 

'Tis the official spare parts catalogue . . . . <whistles> 

[Teutonic_Tamer]

Also the high pressure fuel pump is now driven off the exhaust cam and not the inlet cam, with 4 lobes not 3

I think that is slightly irellevant though.  Because my RS4, along with the R8, and RS6 V10 biturbo all use the inlet cam to drive the FSI pump - and you should see the monster pumps on the RS6. 

They still have re-designed it though.  I guess this is because of the issues with cam lobe wear with the single piece cam on some but not all BPY engines.

Yes, agreed they "redesigned it".

However, to be a little pedantic, it wasn't the fact that the inlet camshaft, per-se, is a bad place to site the pump, and the exhaust cam is inherently better (I'd actually stick my neck on the block, and actually state the exhaust cam is actually worse!).  The actual problems regarding the fuel pump on the 2.0TFSI were soley down to inadequate case-hardening of the relevant cam lobes - and this could happen on exhaust cams too! 

And pedant mode #2, we never got the BPY engines.    The BPY was/is a North America specific unit, and has different emissions standards and ECU settings.  The AXX was replaced in Europe and the Rest of the World by the BWA, and some of these are also alleged to suffer with wear on the lobes. 

[RedRobin]

After having a test drive in the new Rocco. I can say that the engine is smoother at the top end.

But it dosen't have as much *Puff*. A very linear power delivery.

....I found it very smooth too, but not very exciting. In standard form an excellent daily ride whatever the distance and type of road but not the sort of car you feel you want to take out just for the pure fun.

So the engine has sort of had its "soul" removed?  And would some fettling by Milltek and Revo re-awaken said soul? 

....I reckon that the soul is there but needs the 'fettling' by the likes of Milltek and Revo to put the driver more in touch with it. My problem is that I've extensively modified my car such that it has become very, very tactile and 'tactile' driveability is what I seek in a car in order to enjoy my driving. 24hrs in a Toyota Yaris emphasised that!! Even the VeeDub Lupo was more tactile than the Yaris!

It's understandable that most car manufacturers offer production cars which are anaesthetised so that the driver feels more remote from what's going on - Mr & Mrs Jo Public don't want to get involved.

I extensively played with the Comfort / Normal / Sport settings and then left it in Sport - The rest were a waste of time imo - The differences were perhaps too subtle.

[revo carl]

brilliant engine the 2.0tsi! loads of torque! yes it is the new MED17ecu and we're also the first people to do switchable software for it

Carl, without giving away any "trade secrets", what is/are the difference between the MED9-series and this new MED17 ?

compleatly different platform to anything out there, not to be confused with the other MED17 ecu's out there on other marques such as BMW MINI's as they use a different system alltogether although still a kind of MED17

[ukdub]

Also the high pressure fuel pump is now driven off the exhaust cam and not the inlet cam, with 4 lobes not 3

I think that is slightly irellevant though.  Because my RS4, along with the R8, and RS6 V10 biturbo all use the inlet cam to drive the FSI pump - and you should see the monster pumps on the RS6. 

They still have re-designed it though.  I guess this is because of the issues with cam lobe wear with the single piece cam on some but not all BPY engines.

Yes, agreed they "redesigned it".

However, to be a little pedantic, it wasn't the fact that the inlet camshaft, per-se, is a bad place to site the pump, and the exhaust cam is inherently better (I'd actually stick my neck on the block, and actually state the exhaust cam is actually worse!).  The actual problems regarding the fuel pump on the 2.0TFSI were soley down to inadequate case-hardening of the relevant cam lobes - and this could happen on exhaust cams too! 

And pedant mode #2, we never got the BPY engines.    The BPY was/is a North America specific unit, and has different emissions standards and ECU settings.  The AXX was replaced in Europe and the Rest of the World by the BWA, and some of these are also alleged to suffer with wear on the lobes. 

I think the most interesting thing is that they have gone to 4 lobes on the cam.  That is more important than which cam drives the HPFP.  With running more lobes, the spring on the HPFP doesn't have to be as strong, therefore putting less pressure on the cam lobe.