[Z06] can you over rev engine?
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Advanced
Joined: Nov 2001
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From: middletown in
can you over rev engine?
I had just washed car after short trip. Engine was still warm and I revved engine to 5000 rpm several times just to hear exhaust sound. My foot had clutch in. Was this harmful?
Melting Slicks
Joined: Jul 2003
Posts: 2,454
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From: Ventura County CA
Originally Posted by sgmcneil
I had just washed car after short trip. Engine was still warm and I revved engine to 5000 rpm several times just to hear exhaust sound. My foot had clutch in. Was this harmful?
Race Director
Joined: Aug 2000
Posts: 10,649
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From: Central Florida
Based on the circumstances you described, no harm was done.
In neutral and on up-shifts, the rev limiter will cut fuel to the engine at 6600 rpm, so it won't "over-rev."
Only way to over-rev the engine is to make an error in downshifting, e.g. intending to go 5th>4th and grabbing 2d instead. When you release the clutch in the wrong gear, a high entry mph will mechanically push the engine rpm beyond 6600...the usual result is engine damage...to pushrods, sometimes valves, rocker arms etc.
A dealer seeing this damage will attribute it to a drivr-induced over-rev.
Ranger
In neutral and on up-shifts, the rev limiter will cut fuel to the engine at 6600 rpm, so it won't "over-rev."
Only way to over-rev the engine is to make an error in downshifting, e.g. intending to go 5th>4th and grabbing 2d instead. When you release the clutch in the wrong gear, a high entry mph will mechanically push the engine rpm beyond 6600...the usual result is engine damage...to pushrods, sometimes valves, rocker arms etc.
A dealer seeing this damage will attribute it to a drivr-induced over-rev.
Ranger
Drifting
Joined: Nov 2001
Posts: 1,684
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From: Jacksonville Florida
I'm not a big believer in revving up a motor that is not under load (neutral/clutch in) but you didn't hurt anything.
Les
Les
Originally Posted by sgmcneil
I had just washed car after short trip. Engine was still warm and I revved engine to 5000 rpm several times just to hear exhaust sound. My foot had clutch in. Was this harmful?
Le Mans Master
Joined: Nov 2001
Posts: 6,984
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From: Central Coast CA
To answer the question "Can you over rev engine?"
Yes you can but since you only did 5000 rpm's, then no. Anything past red line is an over rev. The rev limiter doesn't guarantee an engine won't be damaged. Yes it cuts the fuel but the momentum of the car, as such during fast moving downshifts, will over rev and damage the engine.
Yes you can but since you only did 5000 rpm's, then no. Anything past red line is an over rev. The rev limiter doesn't guarantee an engine won't be damaged. Yes it cuts the fuel but the momentum of the car, as such during fast moving downshifts, will over rev and damage the engine.
Pro
Joined: Jul 2003
Posts: 645
Likes: 1
From: Hillsdale NJ
Originally Posted by Shylor
To answer the question "Can you over rev engine?"
Yes you can but since you only did 5000 rpm's, then no. Anything past red line is an over rev. The rev limiter doesn't guarantee an engine won't be damaged. Yes it cuts the fuel but the momentum of the car, as such during fast moving downshifts, will over rev and damage the engine.
Yes you can but since you only did 5000 rpm's, then no. Anything past red line is an over rev. The rev limiter doesn't guarantee an engine won't be damaged. Yes it cuts the fuel but the momentum of the car, as such during fast moving downshifts, will over rev and damage the engine.
Advanced
Joined: Sep 2003
Posts: 72
Likes: 0
From: Salt Lake City UT
Originally Posted by ZO6Les
I'm not a big believer in revving up a motor that is not under load (neutral/clutch in) but you didn't hurt anything.
Les
Les
I don't think you hurt anything, but I also think Les is right. It's not the best idea to put high revs on an unloaded engine (by unloaded I mean in neutral like you did). Rev it up in gear going down the street and enjoy the sound and the sensation!
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