At what point do I need to upgrade the internals ie. HD timing chain kit, oil pump gears, headstuds? I'm about to upgrade my FGXR6T, mods are as follows, walbro 460l fuel pump, Bosch 1000cc injectors, atomic valve springs, Aeroflow gtx3582, plamaman 1000hp cooler, mackilec TSI, HF cat, has an xforce exhaust (not sure on size yet) and 4" dump, I'm wanting to push 400rwkw, problem is funds are getting low and probably could only afford the labor and tune costs atm, what sort of power would be safe until I could afford the other engine work? It's currently running 277rwkw with the standard turbo and the walbro, exhaust and HF cat