Interesting D4 Audi S8 4.0 TFSI Garrett based turbo upgrade and custom manifold build from Under Pressure Racing Development
The 4.0 TFSI twin turbo V8 Audi platform is seeing some very interesting builds. Under Pressure Racing Development is responsible for this D4 Audi S8 with a very intriguing turbo setup. Unfortunately, they are not sharing many details.
The turbochargers are obviously cocked different and they seem to be reverse rotation Garrett units although we are not sure on which specific units.
The manifold design is custom but apparently these will be sold and this is all we know about them:
Quote:
Under Pressure Racing Development]It’s tight in there but I think I got it! 1.25 to 1.5 to 2”. They have 1.25 ports in the cylinder head and believe it or not the factory manifolds squished them down even tighter than that on the inside. Once finished we will have them sent out and have blankets made by PTP Turbo Blankets!
How much power are they shooting for? How are they tuning it? How are they fuelin git? How is the transmission going to cope? All valid questions without answers at the moment.
