722maa

did a retune this morning, managed 591hp, once I get my stock filter back, I'll be getting 40hp +

GermanGarage

That is awesome!!! Gotta get mine done... Stasis has the closest dealer... Come on Stasis.

GermanGarage

Hows the S-tronic holding up? This big question....

NeddyPlast

Thats a huge increase without any additional hardware changes. I would think at a minimum exhaust work is required for flow. I'm sure a few pulls at this power level you are heat soaking no matter what.

But hey, let us know how it holds up. Also, ask if they see any weak points in the plumbing, any particular hoses that are susceptible to boost leaks due to the higher pressures.

GermanGarage

This new platform is outrageously great. I mean, Buick GNX great (adjust for time period, please...)

It is stunning to me to see how a tune could take a 420hp engine and push 550s, perhaps 600s. Considering the engine is 4.0 liters (read: tiny) and efficient as heck, this platform has to be the best in the biz.

And this is version 1.0.

Audi has something amazing here.

DeerHunter

Rob, you could be right and I'm only speculating. Given that detonation is most likely to occur near torque-peak (i.e. the mid-range), turning down the boost near redline is just throwing away power, all else being equal. It's much more likely that the turbos are just churning hot air at high flow/high rpm and there's no percentage in running high boost above 4,800 rpm or so.

Of course, it could be other factors, like running out of injector capacity. As you say, more information is needed.

dht34

Amazing numbers...!

AndreyATC

Any differences in S8 and S6 setup?
Or S8 is just altered software tune over S6

DeerHunter

Yes. Different turbos and pistons. S8 also has dual intakes, an oil cooler and, of course, the 8-speed auto. There may be other differences as well.

HyperS4

So does this mean that the factory airbox is better designed for maximum flow than any open element intake?