Hi Guys,

I'm new to the 2.7T, so i would like to find out what are the actual differences between the 2.7T motors fitted to the A6, S4 and RS4. Eg.- internals, heads, turbos, management, harness, etc.

I'm looking to buy an A6 with possible engine damage.
I'm definitely modifying it, so i'm looking at the following options.
A. Fix the stock motor (if fixable), and go for bigger turbos + Chip+Exhaust, etc.
B. S4 engine
C RS4 Engine.

Also, how strong is the Tiptronic gearbox, what HP levels can sustain.

Any input is highly appreciated.

Cheers

 

The A6 and S4 turbos are pretty much identical, there are different PCV configurations for different year engines, and whether its an automatic or not. Both the A6 and S4 use K03 turbos, the RS4 is different because of the K04 turbos and hardware (tubing)
Automatic transmission cars are equipped with secondary air injection, the manual is not.

The tip tronic trans can handle power just fine, but the torque conveter will start acting up around 400 bhp.

 

Hi,
Thanks a lot for all info.
I was reading trough - "Audi_S4_engine_english" pdf. - http://www.vaglinks.com/Docs/A...h.pdf
And i was wandering what do they mean by - " A tuning protective device prevents
the S4 engine control unit being
installed in the A6!"

What stops me from using a S4 ECU, apart from the immo coding?
Aslo, would A6 chipped ECU, have the same or better performance results then stock S4 ecu?

 

Also remember that in 03 and 04 the 2.7t was built with bigger oil feeds to help with the gunking issues. Also in the s-line power was bumped to 265 hp / 280 ftlb's. Many problems with the 00-02 2.7t's that did not receive proper maintence and have turbo problems.