Need tech info.

[RussianM3_dude]

Some peeps on another forum refuse to believe that even in S mode, the exhaust valves stay closed in the first 3 gears between 1000 and 3700 rpm. Where can I get official info to shut them up?????

Thanks.

[rubyblack]

Best bet would be for you to disconnect yourself from the WWW....so you pissed the rs246 crowd off, who's next????

A leopard doesn't change its spots eh???? :noshake:

[RI_RS4]

From:
Audi 4.2-liter V8 FSI Engine
Self-Study Program 921603

Exhaust Flap Control
After the Sport mode is activated, unlike in normal
operation, the exhaust flaps in the rear silencer are
opened when the engine is idling. This emphasizes the
sporty sound of the RS4 engine.
After engine speed is increased, however, the exhaust
flaps are closed again. This ensures that the vehicle
meets the statutory noise emission limits.
Reopening of the exhaust flaps while driving is speed
and load dependent, and is regulated on the basis of a
characteristic map.

[Audihead]

Thank you to Mori for the following info:

Non Sport mode:
exhaust flaps stay shut until 5,000k rpm in 1st, 2nd, 3rd gear.
exhaust flaps stay shut until 4,500k rpm in 4th, 5th, 6st gear.
throttle 50-60 % open till 5,500 rpm in 1st, 2nd, 3rd
throttle 100% open 0-8,250 rpm in 4th, 5th, 6th

Sport mode:
exhaust flaps open at idling 760rpm
exhaust flaps shut from 1,000k rpm until 3,700k rpm in 1st, 2nd, 3rd
exhaust flaps open ALL the time from 0-8250rpm in 4th, 5th, 6st gear.
throttle 50-60 % open till 5,500 rpm in 1st, 2nd, 3rd
throttle 100% open 0-8,250 rpm in 4th, 5th, 6th

[RussianM3_dude]

Thank you.

[RussianM3_dude]

Best bet would be for you to disconnect yourself from the WWW....so (http://WWW....so) you pissed the rs246 crowd off, who's next????

A leopard doesn't change its spots eh???? :noshake:

It's not for rs246. I think they all already have this mod done.

[tazsura]

Slightly off topic...but what effect does drving in Sport mode have on your fuel consumption?

I have noticed very little diff if any. Also, by disconnecting the valves completely, does this have any effect on mpg?

Cheers

Taz :thumb:

[RussianM3_dude]

Some people reported that the consumption actually improved with the valves disconnected.

[tazsura]

Cheers M3_dude. This is what i expected...free-er flowing exhaust usually aid fuel consumption a tad.

Hmmm..might have to look into this.

Taz :thumb:

[RussianM3_dude]

From:
Audi 4.2-liter V8 FSI Engine
Self-Study Program 921603

Exhaust Flap Control
After the Sport mode is activated, unlike in normal
operation, the exhaust flaps in the rear silencer are
opened when the engine is idling. This emphasizes the
sporty sound of the RS4 engine.
After engine speed is increased, however, the exhaust
flaps are closed again. This ensures that the vehicle
meets the statutory noise emission limits.
Reopening of the exhaust flaps while driving is speed
and load dependent, and is regulated on the basis of a
characteristic map.

What is the Self-Study program??? The instruction manual???

[Audihead]

What is the Self-Study program??? The instruction manual???

The SSP is what Audi Techs use to study the cars they have to work on. The Audi Service Managers and Advisors also use them to answer customers questions about their cars. They are internal Audi documents. If you have codes you can find them at www.accessaudi.com

[Mori]

Thank you to Mori for the following info:

Non Sport mode:
exhaust flaps stay shut until 5,000k rpm in 1st, 2nd, 3rd gear.
exhaust flaps stay shut until 4,500k rpm in 4th, 5th, 6st gear.
throttle 50-60 % open till 5,500 rpm in 1st, 2nd, 3rd
throttle 100% open 0-8,250 rpm in 4th, 5th, 6th

Sport mode:
exhaust flaps open at idling 760rpm
exhaust flaps shut from 1,000k rpm until 3,700k rpm in 1st, 2nd, 3rd
exhaust flaps open ALL the time from 0-8250rpm in 4th, 5th, 6st gear.
throttle 50-60 % open till 5,500 rpm in 1st, 2nd, 3rd
throttle 100% open 0-8,250 rpm in 4th, 5th, 6th

I don't take credit for this as this was posted originally by someone over at rs246.

Russian: which forum? Address?

[Audihead]

I don't take credit for this as this was posted originally by someone over at rs246.

Russian: which forum? Address?

Thought I would give ya credit, don't go to that other site.;)

[RussianM3_dude]

I don't take credit for this as this was posted originally by someone over at rs246.

Russian: which forum? Address?

French Forum.

[Leadfoot]

French Forum.

You mean they have Forums which aren't all about Renaults, Citroens and Peugeots.:D

[Ritchy]

It happens...