ginga tubby made peak boost at 7.5k without the nos if i remember right
My turbo makes peak boost at about 4.5k rpm and then holds that boost until the limiter with no drop off at all 8) on my dyno run at PTS my car hit the rev limiter (7500rpm) before hitting max power which probably means the engines usable power band was up to 8k rpm
The ability to rev is effected by many things
Component weights and strenghts pistons,rods,crank,valves,springs,cams,pullies etc etc
Balance of rotating components
friction losses
angle of rods to crank and pistons which is effected by stroke,rod length,gudgeon pin position in piston etc
Cam duration and lift (see flow)
Ability of valve train to keep valves opening and closing properly eg no valve bounce at high rpm
Air flow through engine eg the ability of the engine and it component parts to flow enough air in and out of the engine, this is effeted by everything from the air filter to the exhaust.
the ability to make a engine rev high is different to the engines ability to make power at high rpm as one depends of strenght,weight and balance and the other depends of air flow
A stroker kitted engine will always be a nicer and easier car to drive than a non stroker engine as it will have better more usable spread of power and torque true the non stroker should rev better but how often are you going to be using those high rpm :?: it would be much better imho to have the same power/torque but at a more usable rpm which is what having a stroker kit achieves nicely 8)
High rpm is fine if you spend your whole life on the track but for most of us our cars will be mainly for road driving where having a high revving car is just a pain in the arse
