redline

I have a 96 audi A4 with like 110000. I was wondering if it is smart to redline it? It has been perfectly maintained but I just wanted to make sure it was ok to do this.

Redline it when? Reving an engine that high always has a negative effect, though it may not show up right away. It really shortens the life of your car. I suggest only doing it when you must, like in a race situation(I should prolly do it less myself as well).

I wouldn't neccesarily redline it. It depends on a couple of things - first of all, is your torque curve even such that you Need to redline it for more power? Lots of cars torque curves drop off before redline, so redlining it can just be lost power. On a smaller engine like yours, however, the torque curve may extend past redline, so it may bring more power redlining it - look up the torque curve / peak of your car.

As far as redlining regularly, I would advise against it - obviously it's hard on the engine. Save it for only when you're racing.

its never smart to redline any car... lol

Its not a big deal to redline any somewhat modern car. It has a redline limiter for a reason. While there IS more wear and tear at hirer rpms the limiter keeps it pretty safe.

Cars dont make more torque after redline, not even screaming high revving engines.

Your motor has quite a bit of miles which means that the bearing clearances are a little looser, the oil pressure isn't what it was when the car was new, the valve guides probably have a bit of wear which lets the valves hit the seats a little out of line which stresses the valve stems, the valve springs have most likely lost a pretty good bit of their tension........................etc. If you want the car to make 200K you might think about cutting the motor some slack.

500

its never smart to redline any car... lol
wanna bet?

Cars dont make more torque after redline, not even screaming high revving engines.
wanna bet?

examples (not trying to be a dick)

I've "redlined" my MTX with 200k on it. the redline starts at 8000 but it doesn't shut down cylinders till 10500. no problems yet.

Most modern engines are electronically protected from spinning faster than the safe limit.