anyone over reved your engine?
anyone over reved your engine?
hi ,my friend he over reved his engine to 8k rpm for couple sec today,and he is worry about it,so is it gonna be a problem or? btw the car is runing fine after that .and does it void his warranty cause ECU may store that over reved.ty
Last edited by xXEVOloverXx; Oct 12, 2008 at 10:14 PM.
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How did you do this? I mean... how did your "friend" do this? 
J/K So how did it happen exactly? Was it a downshift to the wrong gear or when the RPMs were too high? That's the only thing that I can think of that would really cause that since the rev limiter on accel won't allow you to go past the 7600 rpm fuel cut. Depending on how quickly it was caught it could be little to no damage or it could be catastrophic. If the car was downshifted into too low of a gear and the revs jumped to 8k but the clutch was immediately depressed and it was caught early then most likely nothing happened. If it lingered there for a couple of seconds like you said then I don't know.
I think it's probably fine seeing as how some people have raised there rev limits with ecutek to as high as 8200 rpms because the X seems to love to rev because of the bore X stroke ratio and so far I haven't heard of anyone having any issues so far. I am suspicious of that though, because that's a pretty big increase on stock cams and especially for these wimpy valve springs that the X seems to have. Time will tell I suppose. If his car drives fine then I wouldn't worry too much. If it's making ticking noises or other wierd noises that seem out of the ordinary then I would go to the dealership and say nothing about the cause just say you hear wierd noises and suspect the valves.
J/K So how did it happen exactly? Was it a downshift to the wrong gear or when the RPMs were too high? That's the only thing that I can think of that would really cause that since the rev limiter on accel won't allow you to go past the 7600 rpm fuel cut. Depending on how quickly it was caught it could be little to no damage or it could be catastrophic. If the car was downshifted into too low of a gear and the revs jumped to 8k but the clutch was immediately depressed and it was caught early then most likely nothing happened. If it lingered there for a couple of seconds like you said then I don't know. I think it's probably fine seeing as how some people have raised there rev limits with ecutek to as high as 8200 rpms because the X seems to love to rev because of the bore X stroke ratio and so far I haven't heard of anyone having any issues so far. I am suspicious of that though, because that's a pretty big increase on stock cams and especially for these wimpy valve springs that the X seems to have. Time will tell I suppose. If his car drives fine then I wouldn't worry too much. If it's making ticking noises or other wierd noises that seem out of the ordinary then I would go to the dealership and say nothing about the cause just say you hear wierd noises and suspect the valves.
ty for reply,he said that he just accelerated to 8k (no fuel cut),not missed shift,not down shift,he was disturbed by other car cut him off.
Last edited by xXEVOloverXx; Oct 12, 2008 at 11:00 PM.
The only real way to defeat the rev limiter is to over-rev it under back-shifting. If you over-reved it, that's how it was done. There's ways to defeat the rev limiter, but you'd know if you did it. Usually a bent valve is the result of over-reving a motor. A lightly bent valve may just cause a rough idle. A really bent valve will drop the cylinder. If you're sure it was done under acceleration, you didn't rev it to 8k. You still could damage your motor by reving it to redline in neutral, as it should be under a load when reved that high. If you want to make sure, have a leak-down done on it.
. Like others have said this engine likes to rev and it should be fine if you don't stay in the red for long periods of time.
