" This is almost getting absurd. APR is dialing in their Stage 2 tune for the RS6/RS7 4.0 TFSI twin turbocharged and direct injected V8 and the results are jaw dropping. They are still working on this tune but preliminary figures with just the software and a cat delete show 680 horsepower at all four wheels on their Dynapack. Feel free to take a moment for that to sink in. That is just shy of 700 horsepower at all four wheels with just software and exhaust modifications.
With additional bolt ons it looks like the 4.0 TFSI will be capable of surpassing 700 at the wheels before anyone even needs to modify the turbochargers. You thought the AMG M157 would be the king of German V8 turbo tuning due to its 5.5 liters of displacement? Think again.
APR managed a 10.6 @ 129 in the 1/4 mile with their RS7 on a Stage I tune
. That was accomplished with roughly ~600 wheel horsepower.
It looks like the Stage 2 setup on race gas has a shot at breaking into the 9's. Wow.
(before someone tries to be smart and point out why the horsepower and torque do not cross at 5252 it is due to the horsepower and torque being scaled to show max figures)