Shredster

^ Welcome. Nice poignant first post!

DeerHunter

The R8 used either a V8 or V10, both naturally-aspirated. No relationship to the V8TT at all. I would hazard that the Bentley uses a similar version of the V8TT as the S8, which has been strengthened and improved to handle the additional power.

I'm not saying that the S6/7 version of this engine cannot deal with more power. I am saying that the factory thought it prudent to make some judicious improvements before turning up the wick. Take it for what you will.

Vijay

For those of you who may have been around in the B5 S4/RS4 days, you will recall that the B5 S4 could be tuned to power levels far beyond the stock RS4 with no problem whatsoever, even though the RS4 had different cams, internals, etc. My worry is more the transmission. If Audi chose not to use DSG in the RS7 due to power handling concerns, then it worries me to put that kind of strain on the system.

DrCondor

Watching one of 'my' techs replace the clutch in his soon-to-be stage 3 B5S4 reminded me that Audi is smarter than most of us. If I end up tuning this car it won't be for at least another year...by that time I expect there will be ample inductive evidence for whether the APR tune exceeds the limits (over time) of our transmission. Also, as much as I trust Audi and the APR reputation, I still can't fully comprehend the heat issues associated with placing the turbos in the 'V'.

So I will wait and watch.

Vijay

Here's my take on the turbo placement and issue of heat: On one level, this placement makes a lot of sense. Heat rises. As such the heat will stay away from many engine components. However, there doesn't seem to be much ventilation up there. I don't see how that engine cover doesn't completely melt quite honestly. And the hood must get pretty cooked also. Can't be good for the paint. What about paint protection film on the hood? Anyone having any problems with this due the the hood being cooked from the turbos?

mwar99

No issues on my hood with the film on...however, I would expect that if the engine cover were removed you would see bubbling of more than just the paint...

marketman

(First time poster too!)

Just had the APR tune done yesterday. I notice a new sound as well around 2500 RPM. At first I thought it was tire squeal from the additional torque, but it happens at any speed at that RPM. I'm guessing too that it's the turbos but it doesn't "natural" to me because it's choppy and lower pitched.

Agreed the power more than makes it up for me, but makes me wonder a bit what's going on there under the hood...

lnferno

This comment seriously made me LOL!

Anyways, sorry for bumping an older thread. I got an S6 last month and doing my research. Lots of good dialogue in this thread.

I also recognize some names from the B5 S4 days several years ago. It's cool to see a lot of the old-schoolers in an S6 now. I just ordered the APR mobile dongle and looking forward to getting the tune put on next week.

The_Mizarc

2nd that! D@mn lawyers and their big words (>_<)!! (looking up temerity)