I hammered on Ford until they answered me on Facebook:
Ford Racing:
We spoke with our engineers and without giving away too many trade secrets, here is what we were told. The EcoBoost Race engine has been designed and calibrated to withstand the continuous high RPM demands associated with endurance racing. The EcoBoost race engine uses a stock block, forged rods and pistons in conjunction with a slightly modified cam. The heads are stock castings with slight modifications to enable improved flow to accommodate the larger turbos. Due to series requirements, the VCT is locked out. Thanks again for your post and good luck with your high horsepower Flex!
Mike Bambic
Is the car still direct injected if so did they upgrade the factory fuel pump and injectors
I need to find a source to be able to upgrade my high pressure fuel pump and injectors
Ford Racing
Yes, still direct injected with a bigger fuel pump. Good luck!