It all comes down to your supporting mods (fuel system & tune mainly) and if you are preared to shorten the life of the engine. As mentioned, turbo sizing and specs play a big key but 12psi on a 9.6:1 engine is theoretically ok. I would not push much further and quality of internals will most likely be up to scratch
Really depends how you drive the thing as well. Constant prolonged load/boost will kill just about any engine. Good thermal aids are a plus, decent sized oil cooler. Lower temp thermo and fan switch.
Bookmarks