most will tell u to just take it easy lo...the parts are all new and rough edges need to be smoothened out. and its not only your engine thats new, other components thats bolted on to it, like ur a/c compressor, alternator, gearbox, etc....
but once you've run in your engine properly...just whack 9 within the redline lar. thats what its there for...to tell u its safe to do it! ahaha :lol: but of course like most things, with harder use comes increased wear and tear. it cant be helped!! your tyres for example. u drive a lot daily and go through bad roads and stuff sure it will wear down fast right? compared to a guy that just uses the car to get to the store down the street...
same thing lo.... :)