stop and think about what your saying for a moment here....theres a 780HP talon running 9:1 compression without a problem(engine wise anyway) now 9:1 isnt especially high I just gave that as an example, theres a 650hp honda running 11:1 dont go around saying it cant be done...read maximum boost by corky bell, it can and has been done, I am currently building a twin turbo v6 right now with 10.5:1 compression, as long as your internals can handle the power level and you have good tuning, your good to go...but you must have COMPLETE control over your fuel and spark, besides people boost stock 5.0s all the time and the compression is what? like 9.5:1 on those?