[jasonrmorrow]

What makes an Engine rev...i have this little thing about people calling engines motors...

but anyways, the ability for an engine to reach high rpms is based on several factors, piston speed is one of the big ones, a longer stroke will cause the piston to reach a higher speed which can cause it to score and overheat if not properly lubricated or coated.Rotating mass, the heavier the crank, con rod, and piston the tougher it is to sling it around efficiently. Light but very strong forged parts will allow for a lighter rotating mass and allow the engine to rev up quicker and continue onto higher rpms without much stress. If you have seen a new gen III small block there is basically no piston skirt,which reduces weight and the pistons are teflon coated to limit friction.

Valve float can also limit rpms, valve float occurs when the vlave physically cannot open and then close in the time it takes the piston to come back up for compression. This can be helped by adding solid lifters and stronger valve springs, but then you get into reliablitly issues and things like stud girdles and other exotic and expensive add ons.

Lubrication would be a big concern of mine though, there are a lot of engine builders that can build your engine to rev and know the proper passages and galleys to open up or block off to improve the flow and prevent failure due to lack of lubrication.

Some of the guys at work went to a tech training course with gm and the new vette engine, with the rev limiter disabled, is good to 15 000 rpm, according to one of the engineers, which means it may run at that speed but not for long, kind of like a race engine.

Read up a bit on that or the smaller import engines, there are just certain limitations to each engine design.