Why is that a big deal? Because upgraded turbo hardware will easily push past that mark. @Terry@BMS believes 800 wheel horsepower might even be cracked on the stock turbo hardware with a bit more boost.
The DCT is handling the power and torque thanks to the Dodson DCT clutch pack upgrade. Dodson is simply the way to go if modifying the BMW DCT transmission.
Further details from Terry@BMS below:
I'm sure these JB4 record threads are getting tiring by now... But just got back from dyno testing our 2015 M5 development car and I'm happy to report we raised the bar yet again.
The car has a JB4, BCM, BMS intake, BMS chargepipes, BMS methanol (dual CM7 nozzles, straight methanol today), Dodson clutch packs, and around 95 octane fuel. Half and half 100 with 91. What's so amazing about this car is it runs factory turbos, factory exhaust system including all emissions equipment, factory rims/tires, etc. The mods can be installed and removed in literally an hour or so.
Notes on the testing:
1) Pushed boost up to 30psi to get power up to 770whp. What's interesting is that the JB4 monitors boost in both banks, while the passenger side bank produced 30psi the driver side bank running the same duty cycle produced only 27psi. If both banks could get up to 30psi we might see 800whp stock turbos and exhaust!
2) With the dual CM7 on 100% meth the car is still fuel limited. Trims maxed out around 28psi and AFR pitched a little leaner than I'd like. This car probably needs dual CM10 nozzles.
3) The BMS s63tu intake seems to be worth around 15whp peak at this boost level. Not bad at all.
4) We tested the 60-130mph last night at 6.7s at 26psi, which produced ~720whp on the dyno today. The current limitation with improving those times is traction. On the factory tires that 6.7s took some driving. We will probably give it another shot at the higher power level but I think we're going to need R888's or drag radials to really use this power.
5) The Dodson clutch packs are simply awesome. Must have for any DCT over ~675whp. We've had PURE TURBO install them on three of our development cars and they've done a great job with each.