OVER REV!
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Joined: Jun 2006
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From: Valdosta, GA
Well i'm sure i didn't put it into 2. 100%. But i know that when i put it back into gear the red bars where all the way full, i didn't see them blink because i took it right back out.
Still hoping for some suggestions for a shop to take it to down here....?!
Still hoping for some suggestions for a shop to take it to down here....?!
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Joined: Apr 2006
Posts: 389
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From: Akron/Cleveland
Lemme tag along on this post....
I have on occaision on WOT acceleration witnessed the engine rev a few bars past the 9K mark. It seems that there is a gray area of when the rev limiter is not functioning between shifts. I think the inertia of the revs when the clutch is engaged for the shift, carries the engine past the rev limiter (I dunno if the rev limiter is ignition or fuel cutoff) anyways its in that instance this happens. I don't know in absolute certainty what factors let this happen, but it has been repeated on several occaisions.
Is this a reason for concern if this has happened to my engine? Not a severe mechanical over rev from a mis downshift?
I have on occaision on WOT acceleration witnessed the engine rev a few bars past the 9K mark. It seems that there is a gray area of when the rev limiter is not functioning between shifts. I think the inertia of the revs when the clutch is engaged for the shift, carries the engine past the rev limiter (I dunno if the rev limiter is ignition or fuel cutoff) anyways its in that instance this happens. I don't know in absolute certainty what factors let this happen, but it has been repeated on several occaisions.
Is this a reason for concern if this has happened to my engine? Not a severe mechanical over rev from a mis downshift?
Joined: Oct 2005
Posts: 173
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From: Severn
I've rebuilt someone's head for them after a 3-2 over-rev.
Here is what I found, the top of ONE valve broke off, keeper still holding the tip and the bottom rest of valve just floating within the rest of the retainer, and it luckily didn't drop, yet it had nothing holding it except bein bound inbetween a cocked valve spring and a twisted retainer, this person DROVE home like this, and had it started up once after it was home as well...this person was lucky as hell that that valve did not drop, I do not even know how it didn't....
So instead of just changing that valve and that retainer/keeper I went ahead and decided to pull out everything and take a look, on the underside of the retainers, over half of them were cracked, so I replaced all the retainers and keepers, and the valves as well.
I have over-revved my personal S2k ONE time for a split second, the motor has 12,000 miles on it, its an F20C1, I have yet to pull any of it apart and check and see, if I need do a retainer/keeper swap, I can at least do it with the head still on the car, I'll get around to it one day, Or not. haha.
Good Luck.
Here is what I found, the top of ONE valve broke off, keeper still holding the tip and the bottom rest of valve just floating within the rest of the retainer, and it luckily didn't drop, yet it had nothing holding it except bein bound inbetween a cocked valve spring and a twisted retainer, this person DROVE home like this, and had it started up once after it was home as well...this person was lucky as hell that that valve did not drop, I do not even know how it didn't....
So instead of just changing that valve and that retainer/keeper I went ahead and decided to pull out everything and take a look, on the underside of the retainers, over half of them were cracked, so I replaced all the retainers and keepers, and the valves as well.
I have over-revved my personal S2k ONE time for a split second, the motor has 12,000 miles on it, its an F20C1, I have yet to pull any of it apart and check and see, if I need do a retainer/keeper swap, I can at least do it with the head still on the car, I'll get around to it one day, Or not. haha.
Good Luck.
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Joined: Sep 2001
Posts: 9,792
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From: Milwaukee Area
Originally Posted by Kodokan_4,Jun 18 2006, 10:10 AM
Worried about what?
From your brief description, it sounds like your car is fine.
My guess is that if you messed up something (like a valve), you would know right away.
Relax, and don't make the same mistake twice.
-Pete
From your brief description, it sounds like your car is fine.
My guess is that if you messed up something (like a valve), you would know right away.
Relax, and don't make the same mistake twice.
-Pete
Registered User
Joined: Sep 2001
Posts: 9,792
Likes: 5
From: Milwaukee Area
Originally Posted by Kodokan_4,Jun 18 2006, 01:47 PM
Sorry if I gave incorrect info, but I would never consider pulling the valve cover for a 1/2 second over-rev with no symptoms.
I think you guys are right because it's better to be safe than sorry, but if the damage is a slow insidious process, there should be symptoms before failure.
There have also been many over-rev threads where no damage was noticed, but I would never try to talk someone out of an inspection.
-Pete
I think you guys are right because it's better to be safe than sorry, but if the damage is a slow insidious process, there should be symptoms before failure.
There have also been many over-rev threads where no damage was noticed, but I would never try to talk someone out of an inspection.
-Pete
And, guess what, several people on this very forum HAVE HAD THIS HAPPEN. They overrev, not even as long as this guy, and everything seems fine. Suddenly 4 months later, WHAM valve drops into the piston and they had to get a new engine.
So, you can overrev even less than this guy and be fine, or you can have a cracked retainer which costs you a new engine down the road because you thought it was fine.
So, still think you'd never pull the valve cover for a 1/2 second overrev?
but if the damage is a slow insidious process, there should be symptoms before failure.
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Joined: Sep 2001
Posts: 9,792
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From: Milwaukee Area
Originally Posted by Audi/S2K fool,Jun 19 2006, 08:02 AM
Lemme tag along on this post....
I have on occaision on WOT acceleration witnessed the engine rev a few bars past the 9K mark. It seems that there is a gray area of when the rev limiter is not functioning between shifts. I think the inertia of the revs when the clutch is engaged for the shift, carries the engine past the rev limiter (I dunno if the rev limiter is ignition or fuel cutoff) anyways its in that instance this happens. I don't know in absolute certainty what factors let this happen, but it has been repeated on several occaisions.
Is this a reason for concern if this has happened to my engine? Not a severe mechanical over rev from a mis downshift?
I have on occaision on WOT acceleration witnessed the engine rev a few bars past the 9K mark. It seems that there is a gray area of when the rev limiter is not functioning between shifts. I think the inertia of the revs when the clutch is engaged for the shift, carries the engine past the rev limiter (I dunno if the rev limiter is ignition or fuel cutoff) anyways its in that instance this happens. I don't know in absolute certainty what factors let this happen, but it has been repeated on several occaisions.
Is this a reason for concern if this has happened to my engine? Not a severe mechanical over rev from a mis downshift?
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Joined: Dec 2005
Posts: 10,106
Likes: 5
From: Connecticut
If you were in 1st, then you shifted back into first without increasing the vehicles speed, you could not have overreved.. the only thing you could have done it hit the rev limiter. The only way you could have overreved would be if you were going down a hill or had a massive tail wind 