Can someone plz comment on FSI,TFSI, TSI timing.

[GearHead7]

I've been reading a lot about the rear cam timing chains and likely failure of a guide or tensioner leading to a catastrophic failure. I believe there is a new gen 2 guide?
From what I've been reading this issue seems to be focused around the TFSI- TSI Engines and not the FSI?
These are all assumptions I was hoping someone could drop some knowledge in this for me.
I have a FSI, but instead of replacing or upgrading a mod- I may want to do this next if it's something that should be done as routine maintenance and not "unexpected" maintenance.
Anything I should know about a particular kit with a revised guide/tensioner?
Thanks.
I called my local Audi dealer to inquire about it, but they just said any concerns should be addressed way of inspection.. lol

[pezgoon]

It's not the guide that fails on ours, the tensioner fails

I don't think there's a new revision for it vs an old as the issue doesn't really effect anything after 2006 (as they changed it during the production cycle) unless the car was not maintained as well as it should have been (too long of oil changes etc)

I've never seen anyone talk about revisions, they just buy the tensioner, the guide, the chain, associated tools and gaskets and have at it

Also it's only really a service if it's needed, it's supposed to be a lifetime part or it's something people do as a "when they're in there" service.

You know if you need it based upon hearing the chain, the cars tick relatively noisily without issue but ones where the tensioner is failing tick louder (and it gets louder and louder till it skips time) so that's really the only sure way to know (the loud ticking) and with a stethoscope you can narrow it down to the rear cam chain housing

Sent from my iPhone using Audizine

[GearHead7]

AH k, well my motor is not orginal- it is a BWT engine code which I believe is still an FSI but it came from an 08` Cabrio/

[Okedokey]

The tensioner will eventually wear out. When it does it will make a lot of noise.

[80sGuy]

Lot of confusion here regarding the engine, I thought FSI is the same as TSFI with turbo, hence the 'T' in front. I have an '08 and though the engine cover says FSI, but I always thought my car is a TSFI. Oh well, maybe I'm missing something here about these motors.

[GearHead7]

Straight copied and paste from-
https://www.alexsautohaus.com/blog/w...n-fsi-and-tsi/

have been some questions between the differences between the VW/Audi 2.0 liter FSI and TSI engines. I will try and highlight the differences between them to help you understand the evolution of the TSI powerplant from the TSI. I won’t be covering every difference, but I will try to go over the most significant differences.



Before we get too far into describing the differences I would like to clarify that TSI, FSI and TFSI have been used on varying models as marketing vernacular for VW/Audi. Just looking at the engine cover is not always a sure fire way to identify one from the other.



What does FSI and TSI stand for?

FSI is short for “fuel stratified injection” or “fuel straight injection” and TSI is short for “turbo stratified injection”. These are types of fuel injection systems that allow engines to run lean air-to-fuel ratios (better fuel economy) by creating a fuel rich “stratified charge” near the spark plug, but the side-effect is increased NOx (nitrogen oxide). Catalytic converters can remove the extra NOx, but the high sulfur content in U.S. fuel contaminates and destroys them. In Europe FSI engines use the lean burn for optimized power and economy, but the U.S. version uses the same air-to-fuel ratio as port-injected engines.



So, from this description we know that we are talking about a type of injection system, not an engine block. You will see in the modern VW/Audi lineup that TSI, FSI and TFSI are used on a range of engines such as the 3.0, 4.0, and 4.2 liter engines. What we are really looking at then when we are talking about the 2.0TSI and 2.0FSI are the differences between the EA113 engine code normally associated as the FSI, and the EA888 engine code normally associated as the TSI.



For the remainder of this article I am still going to refer to the differences between the FSI and TSI instead of the engine codes for the simple fact that it has become common practice to use them interchangeably for the EA113 and EA888 codes.



What is the same between FSI and TSI?

Displacement: 1984cc
Max Power: 200hp
Max Torque: 206 lb ft
Valves per Cylinder: 4
Bore: 82.5mm
Stroke: 92.8mm
Firing Order: 1-3-4-2


What changed from the FSI to the TSI?

Chain timing versus belt timing in the FSI
Compression Ratio: 9.6:1 down from 10.5:1
Engine Management: Bosch MED 17 from Bosch MED 9
Oxygen Sensors: Addition of one for a total of 3, from 2
Main bearing caps are now cross bolted to the block for additional strength.
Oil spray jets to piston undersides for improved cooling and lubrication.
More balanced cam shafts in the center of the block
Improved fueling system running the HPFP (high pressure fuel pump) off of a dedicated lobe on the exhaust cam.
Improved flowing cylinder head
Updated internals with less internal parasitic loss
Improved PCV system


From the list you can probably see that the TSI is a definite evolution from the FSI. There is a common misconception that the EA113 FSI is the more “tuner friendly” because VW released it in the premium Golf R. This was really the result of production and development timelines from VW, not strength and power limitations for the EA888 TSI. As the EA888 TSI platform progresses you will be seeing some incredible power out of the latest evolution of VW/Audi’s small displacement turbo platform.

[Okedokey]

So anyone put the EA888 head on the EA113 to get 'improved flowing cylinder head'?

[GearHead7]

That's a good question... I wonder if the PCV system could be swapped out too if it's upgraded as well for oil deposits.

[GearHead7]

The guy from the article states, "dedicated cam lobe for HPFP"
doesn't the FSI run off just a single lobe from the cam?

[vce1232000]

So anyone put the EA888 head on the EA113 to get 'improved flowing cylinder head'?

That's a good question... I wonder if the PCV system could be swapped out too if it's upgraded as well for oil deposits.

The guy from the article states, "dedicated cam lobe for HPFP"
doesn't the FSI run off just a single lobe from the cam?

I would say its impossible to use a EA888 cylinder head on EA113 block since its a totally different cylinder head that runs on a timing chain to the crank instead of a timing belt