TSI VS. TFSI

[BlownWideOpen]

Will a diverter valve work the same on both motors? Install wise and what not? Some people are telling me they are different but I'm wondering if this is true...

[JaxACR]

The newest OEM piston diverter valve will fit both the FSI and TSI engines.

[BlownWideOpen]

Well the one that my friend would like to pick up is a Forge one... people were questioning the likeliness of using it on the TFSI.

[JaxACR]

Forge's website lists two options, up to 2007 and 2008+ (presumably FSI and TSI, although the FSI was still present in many 08 models). Try shooting them an email and ask if it will work, they're usually quick to respond.

[Col. Sandurz]

next time title the post better for search request

[BlownWideOpen]

Anybody? My friend would like to get this DV.

[Uber-A3]

If he has a tsfi he already has the d version. Don't waste $$ on the forge unit the d version is superior.

[Rob Cote]

What IS the difference between the TSI and FSI...and is TFSI a misnomer?

[brungold]

Quote, originally posted by robs92jettv2.0 »

What IS the difference between the TSI and FSI...and is TFSI a misnomer?

Quote, originally posted by http://forums.fourtitude.com/zerothread?id=4042736 »

Some major differences from the FSI to TSI include: - chain driven belt - fuel/engine management - components in the intake system - oil filter and oil dipstick relocated - improved PCV system (proved to be problematic in the FSI) - compression ratio lowered to 9.6:1 - more balanced cam shafts in the center of the block on both sides - down pipe - fuel efficiency (debatable) - better emissions - more 02 sensors on exhaust system

[tdotA3mike]

Quote, originally posted by robs92jettv2.0 »

What IS the difference between the TSI and FSI...and is TFSI a misnomer?

so the FSI was the first gen direct injection engine made by vw/audi

there are some issues with this engine like the flat tappet follower....

the FSI is belt driven

The TSI (TFSI in the audi world) is the 2nd gen direct injection engine,

its completely different block and head, it uses a roller cam follower, its chain driven. etc...

so

FSI First Gen

TSI/TFSI Second Gen

[trucaliber]

Engine covers makes a confusing topic even grander.

1st gen = 2.0T FSI
2nd gen = 2.0T TFSI

So when someone says, "I have a 2.0TFSI" it could be either.

[Rob Cote]

Sweet info guys, thanks. And the changeover was sometime mid-'08?

[tdotA3mike]

Quote, originally posted by robs92jettv2.0 »

Sweet info guys, thanks. And the changeover was sometime mid-'08?

IIRC it was the 08.5 on both the GTI's and A3's