I'm an idiot and accidentaly overrevved my car tonite to i think a hair past 7000 and when i went to shift to 2nd gear i felt copmplete power loss almost like the engine died for a split second, then it shifted and drove fine. Did anythign bad happen? will overrevving for a split second destroy my engine?

Devin

 

no. once your not doing it constantly and once its not a cold engine. BTW NEVER REV YOUR ENGIN WHILE AT IDLE!! you will blow your shiet. or at least youll see your pistons fly. neways these retarded *** kids around my way do it alot. i use to do and my oil pressure switch went[dont know thats the reason why] and now my rear valve cover is leaking

 

when you say "never rev your engine at idle" do you mean from idle RPM, do not rev straight to 5k or something, but to have your RPMs up a bit above idle? my idle's 650

 

no what i meant is dont rev your car at high rpm when your in nuetral or park. in other words when your not in gear. i know a lot of ppl do that to show off. when the car is in nuetral they rev the shiet out of it

 

why would revving in neutral be any different from revving in gear? the engine is still going the same speed? i would think if anything taking it past redline in gear would be worse since the engine is actually pulling the car??

 

A lot of kids do that at my school as soon as class lets out. Their engines aren't even warmed up so I just give them a gay look and wait for they day for their engine to kick the bucket.

 

you WILL burn up your internals, if not your oil life would shorten

 

iv never had a prob with mine revving it, oil is fine and everything else is kosher, so i never knew that to be a problem. hmmmm
will investigate

 

yeh well for me, i have to punch my car right after school otherwise i will literally be stuck in a 30 minute traffic. plus, i revved the hell out of my car at neutral after the car warmed up. isn't this kinda ok? havent seen any probs or leaks.

 

not that im an expert on the situation but i have never heard that reving ur engine while in neutral is bad (as long as the engine is warmed up). I mean i've been to alot of car meets where people will have "rev contest"....if its that bad i dont think so many people would do it.
non the less im interested in someone finding hard facts on if revving is bad.

 

it would kindof make sense if you think of it as not bieng a controlled rev. an eg. like an explosion in a box with parameters and limits, in gear. or one without any that would splat everywhere freely like a limp throw. but still i dunno if its bad or not

 

Think of it as firing a bow with no arrow, where is the energy going? It isn't being transferred to anything, except itself.

 

That is a horrible analogy. Yeah in neutral your engine is just 'spinning its wheels,' but seriously, if it can idle at 700 RPM's for 200K+ miles worth of driving, can 2 seconds at 4000 RPM's really hurt anything?

Think about it. If something would mess up while you are revving your car in neutral, it would just as easily mess up if you were in gear at the same RPM. Plus, if you are in gear, you are most likely holding the RPM's up higher for a much longer period of time (several seconds vs. 1 second or so). Now I wouldn't recommend flooring it for 5 minutes while in park, but then again I wouldn't recommend keeping your car at 6K RPM"s while cruising down the road either.

Use some common sense, it goes a long way. As long as your car is warmed up to normal operating temps, it really is not going to hurt it to rev it every once in awhile, even though you may look a bit queer.

 

^^^yes hes right. i mean reving every once in a while wont hurt, but dont keep doing it! its bad for the motor to rev it at a high rpm with no load on it.

 

hes elaborating on my idea and his is actualy more simple and understandable. i think the analogy is fine man, my thoughts where exactly what he said actualy. and i use common sense i gues ^^
the energy isnt bieng put to the wheels but goinjg nowhere. i guess it kindof sounds spacey. but if anything is true i dont think that they are the same things with the same effects. one energy is bieng used and one isn't bieng used. The amount of work done is the same as the amount of energy transferred. so i wud think that when not bieng used, its all vibrations and spinning.
but whatever, i dont actualy think its a big deal. but im not an expert, when i become one then i will have an opinion

 

Can you give a valid reason other than "its just bad", or "my dad told me that".

Just curious.

 

I just rev'd my engine to 7100 yesterday on purpose and everything is just great..

 

i mean you could rev it at 4-5k rpm but over reving is bad. the reason im saying this is because you got the motor running freely with no load on it could literally damage and possibly blow the motor. your putting a strain on your pistons and connecting rods, hell if you keep over revving it i guarantee you, you will snap something. imagine you got a high compression motor or a turbod out motor, the last thing you would want to do is over rev. my friend with an 82 corolla has a 3T motor with 12.5 :1 compression ratio. when he takes it to the track he never even touches 6 because hes afraid of the possiblility of blowing his motor because it did happen to him before. and that was with load!

 

hahah....JUST WAIT
im just joking though, no jinxing your car here

 

If a motor has no load on it, how is it worse for the pistons and rods?

 

cuz you will burn ya shiet up, think about it 7k rpm running freely at the flywheel, how could that possibly be good for the engine?

 

ill paypal you 5 dollars if you redline your motor for 10 minutes in nuetral

 

Nice thread. I haven't seen this much misinformation since I read the JET thread in the 6th gen section.

 

could you correct me then? my friend told me this and hes a good mechanic he has a 12 second eclipse gst. i mean ppl around here have alot of respect for him so what ever he says ppl always agree and never question him

 

why would you rev a cold engine? especially at redline come now your not going to tell me thats bad for your motor!

 

Second question, who revs their engine at redline for 10 minutes?

 

You are not supposed to rev or drive you cold engine hard. Common knowledge.

Your point is reving an engine with no load is more dangerous than reving an engine with a load. Please explain in technical terms exactly why that would be. Because that makes no sense whatsoever.

 

........

 

wouldnt that cause the engine to get hotter with no load? or cause it to burn up and cause more wear? or im a wrong?

btw Deezo of course you wouldnt rev your engine for 10 mins cuz you know its bad right? i mean if it wasnt bad you wouldve done it

 

Load is resistance. Resistance causes heat. If you're riding your bike uphill do you feel more resistance than you would if you're going downhill? In other words, it would take longer for a motor to burn up with no load on it than with a load.

Sure, too much of anything is bad but you are going by what your friend says instead of what has been done. Nealoc (among others) never burned up his motor and he's been to the track a lot running it up to 7200 rpms. Explain that one for me.

 

You aren't answering my questions. If you state it's bad, then you surely most know the technical reasons why. So I'm waiting for that.

But think of this, what's harder. Doing pushups by yourself or doing pushups with 150lbs on your back?

Then again, it's not that great to rev your engine at redline while driving it either. I fail to see how it proves your point.

 

Okay, but how could it be bad?

 

.....................

 

You should sit this one out.

 

I guess there will be no technical answer from 2 Da Max.

 

technical information + =

kthx

 

moving on

 

techinical info? i dont know i just thought it was bad period. but you guys win since you have more info than i do

 

the only reason i thought this was bad is because one time i was comming into my drive way i placed the car into nuetral reved it hard and my friend said oil or something was dripping out the bottom of the car. it turned out to be the rear valve cover which yet i have not fixed. but thanks for the info i guess it made me a little bit smarter today

 

correct me if i'm wrong, but even at a 7K rev, won't that cause some valve float?