what exaclty is over revving?

 

hmm........
revving too much...

too much usually being a bad thing for the engine. past the redline or continually high RPMs for an extended period of time.... or driving on the highway and shifting from 5th to 2nd.. or something like that would be overrevving.

for some reason your question really bothers me.

 

Over revving is simply revving past the redline.

 

It really bothers me too. I mean, it's like asking "what is overtorqueing a nut mean"... hmm..

I'm am sad to find what the average scion owner knows. Not saying I know it all in any form or fashion. But I mean, come on, OVER REVVING.

 

If you dont know what over revving is then i hope you bought or buy an automatic!

but hey thats what a rev limiter is for :mrgreen:

 

thats what i thought it meant, but i had read somewhere that someone said something about over revving in first gear going over 3000 rpms so i wasnt sure

 

Geez, you guys are so mean... so he wasn't sure what it meant... big deal... the forums is where people can ask each other for help... if it bothers you then don't respond

 

Don't hate on him, he may be a new driver or new to stick. We were all there once.

Over revving:
Bringing the RPMs to redline or further.

Operating an engine is a destructive process, low RPM or high. The higher you go with the RPMs the more you speed that process up. Typically, manufactures put a rev limiter on a car usually at or slightly beyond the redline on the tack to prevent over revving. But high RPMs are destructive non the less. To get the maximum power out of the engine you don't always have to hit red line. Depends on the engine and mods.

 

since you guys are all talking about over revving.......is there any way to push the rpms past its limit?????it usualy bounces but say for exmple can u make go to eight????sorry if its a little of topic

 

Go 6k in 3rd gear, and then down shift to second mashing the throttle. That'll force your engine to go higher than the rev limiter.

You do know it's capped for a reason though right?

 

oooooo Rivulent, heck of a tip, I might have to try that some time

always wanted to know what my 4-day old tC would sound like at 10,000RPM's

lol j/k but seriously, i think he knows it now, and the power in a stock tC caps out at max HP at 6000rpms and max torque at 4000rpms and it violently drops from there, so really no reason at all to go over 6000rpms unless you install a really high spooling turbo and don't care that your engine is eating itself alive.

and you can't forget the rev limiter, I'm pretty sure it's there to avoid damage to your engine... not sure if the toyota techs would put a limit *past* the danger point.....

 

smartass...read the question. it usually bounces and it wont go in. i dont know who would do that. for example can u make 1st gear go to 8 with out it bouncing. yes?if yes how? or no.

 

Rivulent just knows everything huh??

 

raydiz... you're confusing the hell out of me....

anyway, i was just trying to make the point that the term "over revving" is all relative. like.. there's the obviousness of going into the red, but there's also like over-revving off the line.. kind of... yeah.. anyway, maybe i'm just making up my own terms. i rule!

 

How did I read the question wrong? He wants to make it go to 7k RPM, but the only way he'd be able to do it is by the method I described. Sorry if I'm coming off as a *****, just having a long day. Otacan is right, after 6k all acceleration seems to go away. Only experienced it once or twice since I'm not a super cool street racer.

 

there is no mod that u can do?????its all good.

 

I'm sure you could, but rev limiters are set in place because the engine can't handle it safely. Not to say hitting 8k once in the engine's life will kill it, but it can bring upon severe damage. This is why different cars have different limiter amounts, because different engines can take only a certain amount of speed. If you want performance, upgrade your engine with new internal components before you think about upping your limiter.

 

cool man thanx..

 

Well... you can increase the amount the engine can rev by getting new pistons, sleaves, cams, fuel rail, injectors, etc. However, you are going to need to tweak the ECU in order to allow the car to let you go above the stock rev limit.

 

I "think" a way to safely go over the rev limiter with mods is to buy come new rockers(i think), valve springs, valves, and take off the rev limiter.. when you rev to high the valves will start to float because the valve springs cant push the valves back down fast enough. that can possibly kill your engine easy. when you upgrade the valve springs, the springs can push the valves down quicker but also wear out the camshaft because there is more pressure put on it.

but then again all of this is coming from a 14 year old kid

i just searched for valve float on google and found this :

Valve Float:
Definition: A high-rpm engine condition in which the valve lifters lose contact with the cam lobes because the valve springs are not strong enough to overcome the momentum of the various valve train components. The onset of valve float prevents higher-rpm operation. Extended periods of valve float will damage the valve train.