I know my relatively stock 318 sure reved quick with light weight parts in it, my rods were over 200 grams lighter than stock my pistons were over 100 grams lighter and of course the thinner rings and narrower bearings I used were lighter and I ground some weight out of the rod throws then they had to drill a couple big holes in the crank throws to balance it, there was a lot of weight removed and with a stock cam and heads it really livened up its behavior to 4000. It would pull hard to 5000 but low rpms is where it was real noticable. Reving the motor from under the hood was crazy, it felt like it was going to suck your face into the motor.