over rev the engine and you will kill it
you cant run 8.5k on a gtr with a standard sump while cornering at high load
it will die
why do gtr driver have to rev it past 7.5... if you car has decent turbos you should have enought pull shifting at 7.5k.. furk its onlylap sprints
7k and your gtr engine will survive long and hard
my gtr engine has complete 200 laps at sevreal track
but if i was taking it raceing (combined touring) and had to rev it that extra 1.5k sump baffels will be straight in over capacity oil fill ect