[Gatsby]

I have some pretty newbie questions that were not answered clearly in the search or the stickies. Should be pretty easy for the resident experts.

What keeps an engine from revving higher? I know there are rev limiters (what are ours set for on a stock LS1?) that limit it, but what keeps it from physically or mechanically revving higher and is it always beneficial to get some more RPM's out of it?

Obviously torque will drop at a certain point, but our engines produce power beyond our rev limiter for durability sake (i'm assuming).

What factors have the biggest impact on our cars not revving higher and how can i get it to rev higher? I'm guessing valvetrain, engine internals, fuel system, and ignition all affect it, but are all those things as important as the next?

I'll be doing a cam swap in the next few months and was wondering if upgraded springs and pushrods and the little valvetrain accessories will allow the engine to rev higher than it does now.

What is everyone revving to on an auto with a stall converter in the 32-4400 range?

If you have taller gears (3.90-4.10) and you could rev higher, would it allow you to run that taller gear without running into OD easier (in the 1/4)?

Just trying to iron out my knowledge without guessing at things, thank you all.