Hello and Turbo Upgrade Questions

[RS6...]

Hi All,

I am a new member to this forum!

Hope to learn heaps and offer assistance where I can along the way.

I am the proud owner of a AVUS Silver RS6.

Turb Question-

I have been researching this and have found the following options:

1) Bolt-on Performance Upgrade - These are basically OEM turbo's which have been modified to allow greater airflow boost. The brands I have found that offer this are: LOBA.

2) Upgrade Existing Turbos - This is where you send your turbos in for a rebuild and performance upgrade, the upgrades can be simple ones such as stronger wastegates, cliping turbine wheels upto doing those plus installing an upgraded compressor wheel. The brands that offer this service are: LOBA and VAST Performance.

3) Custom Turbo Kit - This is where a fabricator makes you a custom kit. This could be done by any fabricator and as fas as I know the only Shop to have done this is MRC. I am interested in this option however the fabricators I have spoken to said this may require body massaging because the turbos may foul the transmission tunnel and this is something I am not willing to accept. If MRC could comment on this it would be appreciated. Even more interesting is if they could supply a turb kit

If anyone on here has tried any of the above mentioned options I would love to hear your feedback and see any logs before/after is you have these also.

If anyone has found/tried an option not mentioned I would also been keen to hear the specifics.

Thanks for your time!

RS...

[Ceveman73]

The main issue with upgraded turbos is that they don't provide many gains on their own due to the severe restrictions in the stock manifold. You can only hope to achieve 560-580 bhp on stock manifold due to flow restrictions. To do it properly requires the engine out to remove the stock manifolds and fabrication of customs manifolds to accept the new turbos. With new turbos you are then talking 700bhp easily, but obviously the gearbox won't take that much power so you either need to get it rebuilt and strengthened or go manual conversion.

To summarise, the main limitations which both require engine out to remedy are:

- Manifolds
- Gearbox/Torque Converter

Hope that helps,

Mart.

[RS6...]

Caveman

Thanks, I should have mentioned that I am also planning to convert to manual.

The manifold issue is something I have thought of also, I would like to know if anyone has acutally put them on a flow bench to see their limitation.

I am more interested if anyone has upgraded turbos so I can hear their results and hopefully see some data logs. My aim is to have a turbo system that has the ability to deliver a flat boost curve all the way to redline as this with the 6MT conversion will make for a lighting fast car, not that it isnt already but the change will be massive.

Thanks and I hope for continued input.

[Ceveman73]

Have a chat with Doug at MRC as he has experience of both manual and turbo conversions of the RS6.

Mart.