I have another thread idea brewing on this subject. I have just acquired a w220 S500 722.6 transmission which has great condition internals. This is the updated type 722.6 with the better design K2 bearing and sprags etc. I will build the S500 internals (Currently in a lightly damaged casing) into a good spare case with all new seals etc and make sure the clutch packs are within new factory clearances.
I intend to set this 722.6 aside for now and eventually swap into a w124 with the appropriate aftermarket ECU / shift controller. My main thought is a Turbobandit or similar M104 build coupled with the 722.6.
Now – my initial question on the 722.6: What is the maximum HP that can be reliably handled with a late build V8 722.6 transmission? I’m talking about 450 – 600HP range say nothing tooooooooo crazy