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Old May 11, 2009 | 09:37 PM
  #61  
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^ says it all
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Old May 12, 2009 | 02:21 AM
  #62  
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Your damn lucky the the clutch didn't come through the floor board.
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Old May 12, 2009 | 07:35 AM
  #63  
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I have to ask...."why is it GM can have a "rev limiter" and not a "rev protector"? I know its all mechanical...but how much extra effort would it really be to incorporate into a manual transmission one more sensor that senses an extreme "out of RPM" range situation and automatically forces the transmission to neutral and kills the fuel to the engine? I mean I know the engine has fuel cutoff's already for the gas pedal sticking electronically type of situations since we have no linkage and it's all done with sensors and computers.

hmmmmmmmmm
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Old May 13, 2009 | 10:04 AM
  #64  
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Originally Posted by XtremeVette
I have to ask...."why is it GM can have a "rev limiter" and not a "rev protector"? I know its all mechanical...but how much extra effort would it really be to incorporate into a manual transmission one more sensor that senses an extreme "out of RPM" range situation and automatically forces the transmission to neutral and kills the fuel to the engine? I mean I know the engine has fuel cutoff's already for the gas pedal sticking electronically type of situations since we have no linkage and it's all done with sensors and computers.

hmmmmmmmmm
First of all that would be a really bad idea, just imagine your going into a corner hot and downshift expecting engine braking and BANG your in neutral.
I know you said "extreme out of RPM range" but who really makes that determination?
Remember you bought a car with a manual transmission because YOU wanted the additional control it gives you! RIGHT?
Then we'd have the lawsuits because the guy was holding the stick and when trans kicked out of gear it broke his wrist......
A better idea would be a shifter guide plate, but then you would whine because it got in the way of power shifting!
How about this......LEARN to drive a manual transmission before you start screwing around!
We can't make everything idiot proof!
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Old May 13, 2009 | 10:30 AM
  #65  
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Originally Posted by corvettebob1
First of all that would be a really bad idea, just imagine your going into a corner hot and downshift expecting engine braking and BANG your in neutral.
I know you said "extreme out of RPM range" but who really makes that determination?
Remember you bought a car with a manual transmission because YOU wanted the additional control it gives you! RIGHT?
Then we'd have the lawsuits because the guy was holding the stick and when trans kicked out of gear it broke his wrist......
A better idea would be a shifter guide plate, but then you would whine because it got in the way of power shifting!
How about this......LEARN to drive a manual transmission before you start screwing around!
We can't make everything idiot proof!
First off, By "extreme out of RPM range" Iam referring to only a thing that could be done as the OP has mentioned. That would be a miss shift that would indicate an over 8000RPM downshift! I don't know too many vettes out there that are shifting in that range. Racing, Pro, Supercharged...you name it. So by having a sensor kick in to have the computer compensate to assist...I see no problem with. The car already has a zillion in one other things kicking in so the statements about lawsuits and breaking your wrist etc....I dunno...if that was the case....more of those would be showing up for current things going on that are already incorporated into the C5-C6 car.

1. Fuel shutoff at greater then 2mph when the column locks up.
2. The column actually locking up while moving.
3. Cags skip shift doing some funky things when your not expecting it.
4. Shifter popping out of gear

These are to just to name a few of the current issues and all have been widely reported with the C5. So I think the benefits of over-revving with some sort of sensor feature would definitely outweigh the people that race or abuse their cars that want the RPM's to be so high that damage may occur. If anything Iam sure a defeat feature of the sensor/feature could be incorporated for people that wished to turn it off nonetheless.

The comment about "learn how to drive"...I think really wasn't warranted or necessary. I mean one's opinion on who actually knows how to drive their manual C5 may differ from another persons. I know plenty of people who have been professionally racing their C5's and still occasionally miss a shift at the track. The "screwing around" comment as well I think doesn't apply either. If your in a tight spot and need to avoid an accident and panic and accidentally downshift to the wrong gear were you "screwing around"? Lastly...."idiot proof?"....ummm no comment.

Just was saying that with the sophistication of the vette and the sensors, computers, and transmission I definitely see in the future a manual transmission that will have more a safety feature built into it. We are basically there already with the C6 having a paddle shifted 6 speed automatic with 3 settings or shifting manual style gearbox. Add this with a vendor to "beef up" the transmission and then tune it properly and you have one serious shifting machine.

Last edited by XtremeVette; May 13, 2009 at 11:22 AM.
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Old May 13, 2009 | 10:43 AM
  #66  
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Originally Posted by corvettebob1
I know you said "extreme out of RPM range" but who really makes that determination?
A tuner can make that determination. Tune it up if you raise the rev limiter. There is no reason to ever be downshifting and revving it past the rev limiter so I wouldn't see how it would possibly be a problem as long as whatever "sensor" was able to be tuned.

I've had problems with my shifter popping out of gear before. If that little force breaks your wrist you got bigger problems.
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Old May 13, 2009 | 10:46 AM
  #67  
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did you change your shorts ??
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Old May 13, 2009 | 03:07 PM
  #68  
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I did a 3rd-2nd shift at the top of 3rd gear and over-revved my motor over a year and half ago and experienced no problems.....Maybe you got lucky like me, i hope so brother


and I ALMOST had to clean my pants...and I felt like a dumbass...if you turn your hand over so palm faces outward you will go to fourth and not second on that shift.
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Old May 13, 2009 | 03:14 PM
  #69  
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Originally Posted by VetterGetIt
I did a 3rd-2nd shift at the top of 3rd gear and over-revved my motor over a year and half ago and experienced no problems.....Maybe you got lucky like me, i hope so brother


and I ALMOST had to clean my pants...and I felt like a dumbass...if you turn your hand over so palm faces outward you will go to fourth and not second on that shift.
how bad did you over-rev? 6500+? Did you catch the accident very quickly and get the clutch pushed back in quick?
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Old May 13, 2009 | 03:31 PM
  #70  
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Originally Posted by XtremeVette
how bad did you over-rev? 6500+? Did you catch the accident very quickly and get the clutch pushed back in quick?
yeah she went over 7k but I karate-kicked the clutch and threw it out of gear as soon as it went that high and it was only for a half-second....car stumbled for a moment and I got a code that said loss of comm with the pcm...after about 10 seconds she went back to normal and I spent weeks worried to death that I was gonna spin a bearing or my tranny would fall out but I still beat on her to this day, she has 156k on her and I had less than 100k when this happened. Corvettes are tough

The tires screamed but the car didnt get sideways...tires also seemed fine after that (i have new rears now but I rode those for A WHILE!!


To the OP, dont feel bad man, even the best drivers miss a shift...good on you for checking traffic before playing anyhow
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Old May 13, 2009 | 05:10 PM
  #71  
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Originally Posted by DevilDog II
The rev limiter will not protect your engine from a missed downshift.
True, that's why they call it mechanical over revving.
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Old May 13, 2009 | 06:26 PM
  #72  
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Originally Posted by VetterGetIt
yeah she went over 7k but I karate-kicked the clutch and threw it out of gear as soon as it went that high and it was only for a half-second....car stumbled for a moment and I got a code that said loss of comm with the pcm...after about 10 seconds she went back to normal and I spent weeks worried to death that I was gonna spin a bearing or my tranny would fall out but I still beat on her to this day, she has 156k on her and I had less than 100k when this happened. Corvettes are tough

The tires screamed but the car didnt get sideways...tires also seemed fine after that (i have new rears now but I rode those for A WHILE!!


To the OP, dont feel bad man, even the best drivers miss a shift...good on you for checking traffic before playing anyhow
Sounds like your scenario is a lot like mine, I'm pretty sure now that theres no damage to the car. Damn I'm lucky. I appreciate your reply and glad I'm not the only one whose done this and survived (us and the cars). I too felt more stupid and worried for the car more than anything. I know doing things like this on public roads is not ethical but if you're gonna do it at least be somewhat cautious, that's my 0.02$. Thanks!
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Old May 13, 2009 | 06:38 PM
  #73  
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Originally Posted by XtremeVette
I will add, I did the same thing while getting on the highway a few weeks back. The 3rd going to 4th and pulled too much toward me and ended up in 2nd. One thing I have never ever done before. I was doing about 65 when it happened.
Close call

Car and Driver article on the C5
1st 50mph @ 6,000rpm
2nd 75mph @ 6,000rpm
3rd 103mph @ 6,000rpm
4th 134mph @ 6,000rpm
5th 172mph @ 5,700rpm
6th 172mph @ 3,850rpm

Originally Posted by Mike Mercury


completely incorrect. Can't "limit" a mechanical over-rev
Actually there is one built in.

The RPMS drop quickly as the piston exits the engine via the intake valve.






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Old May 13, 2009 | 08:21 PM
  #74  
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I can't think of a single person that I know that hasn't done the 1st-2nd-3rd-2nd thing at the track. Everyone messes up once in a while. If you had hurt it, I think it would be noticeable pretty quickly IMO. To read peoples posts here- you'd think everyone here is Micheal Shumaker.
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Old May 13, 2009 | 11:10 PM
  #75  
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[QUOTE=VetterGetIt;1570066979]I did a 3rd-2nd shift at the top of 3rd gear and over-revved my motor over a year and half ago and experienced no problems.....Maybe you got lucky like me, i hope so brother


I did the exact same thing (went to 2nd instead of 4th) and no problems that I can detect after about five thousand more miles. I did not lose control but the tires chirped and I smelt the clutch or tires. I let off the gas and shifted back to neutral immediately. I think that damage would be noticed immediately if it happened.
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Old May 14, 2009 | 01:08 AM
  #76  
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I did a 4th to 2nd as well for a split second and thats all it took.The bad part about it was the car only had about 25,ooo miles on her. Oh well, thats how i ended up getting my ls2 stroker.

Last edited by 976booboo; May 14, 2009 at 01:17 AM.
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Old May 14, 2009 | 10:16 AM
  #77  
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Originally Posted by DevilDog II
The rev limiter will not protect your engine from a missed downshift.
It will protect your engine from a missed down shift. But it won't protect your engine from down shifting to a lower gear than you should and letting the clutch out. No electronics in the world are going to overcome the physicics of what he did. It's like being in 1st gear and having a semitruck pushing you down the road a 70mph, hope the car is ok.

Last edited by c-5-steve; May 14, 2009 at 10:24 AM.
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