Qualification entry for catastrophic carnage contest
Team Owner
Joined: Aug 2003
Posts: 38,314
Likes: 35
Very sorry to hear about your issue. I hope you get it running again soon.
I see you mention the limiter but from my understanding your limiter is irrelevant in this situation. During a mechanical over-rev it is impossible for the limiter to stop over reving the engine. While your limiter should never been set that high on a stock internals engine, I don't think it would have helped no matter where is was set.
Again, hope you get it sorted quickly!
I see you mention the limiter but from my understanding your limiter is irrelevant in this situation. During a mechanical over-rev it is impossible for the limiter to stop over reving the engine. While your limiter should never been set that high on a stock internals engine, I don't think it would have helped no matter where is was set.
Again, hope you get it sorted quickly!
How on earth did that transmission downshift into 1st gear while he was rolling and at WOT?
Seems like it should not have downshifted back into 1st unless he had come to or near a complete stop.
Le Mans Master
Joined: Aug 2008
Posts: 5,578
Likes: 61
From: Austin TX
Sounds like with the high rev limit set, the computer thought it was ok to downshift to first at well beyond the stock redline was.
Sorry to hear that Tom, but you'll be faster I suspect when you're done with the new motor.
Sorry to hear that Tom, but you'll be faster I suspect when you're done with the new motor.
Le Mans Master
Joined: Dec 2005
Posts: 6,999
Likes: 1,685
From: Southeast TX
Sucks. Damn impressive though
. I've seen a bunch of fragmented engines over the years. I run herd on 30+ with at least four that turn 6.5K rpm on occasion. I can't remember seeing that many small pieces with an engine implosion. Yours is right up there with the guy on the F/I section that spit a couple of con rods and piston pins completely out of the motor. I've had a few blocks that you could see straight through. You're up there in my top 5 though
Seriously, I wish you well and hope you build back stronger and more reliable.
. I've seen a bunch of fragmented engines over the years. I run herd on 30+ with at least four that turn 6.5K rpm on occasion. I can't remember seeing that many small pieces with an engine implosion. Yours is right up there with the guy on the F/I section that spit a couple of con rods and piston pins completely out of the motor. I've had a few blocks that you could see straight through. You're up there in my top 5 thoughSeriously, I wish you well and hope you build back stronger and more reliable
.
Instructor
Joined: Mar 2010
Posts: 112
Likes: 0
From: NJ
Does anybody have an intake valve from a blown motor they would sell to me? I'd love to have one just to keep on my desk after I polish it up. I think the huge 2.16" diameter is just impressive.
PM me if you want to sell me one.
~Chris
(strangest request of the day)
PM me if you want to sell me one.
~Chris
(strangest request of the day)
Melting Slicks
Joined: Jan 2004
Posts: 2,246
Likes: 5
From: West Coast
How is this possible? Would not the PCM or TCM stop this from happening?
Thread Starter
Race Director
Joined: Sep 2007
Posts: 16,557
Likes: 2,108
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
Take another look at my post #38. Especially this part: Considering that I was the driver, I have a better perspective of the speed and track location than a spectator. It happened well before the 330' mark and easily less than 50 MPH, but the visual evidence (smoke) came later.
I normally hit the 330' mark around 4.8-4.9 seconds. My 0-60 MPH time is 3.2-3.3 seconds. The trans won't downshift to 1st above 40 MPH. I had my 1-2 shift set for 48 MPH.
Since I spun off the line my 60' was probably around a 2.0-2.1 and the 40 MPH would have been 100-150' feet out at the most after I backpedaled and then went WOT again.
The sequence of events happened quicker than anything that could have prevented it, except a lower rev limiter setting and my right foot.
I normally hit the 330' mark around 4.8-4.9 seconds. My 0-60 MPH time is 3.2-3.3 seconds. The trans won't downshift to 1st above 40 MPH. I had my 1-2 shift set for 48 MPH.
Since I spun off the line my 60' was probably around a 2.0-2.1 and the 40 MPH would have been 100-150' feet out at the most after I backpedaled and then went WOT again.
The sequence of events happened quicker than anything that could have prevented it, except a lower rev limiter setting and my right foot.
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Melting Slicks
Joined: Jan 2004
Posts: 2,246
Likes: 5
From: West Coast
A hard life lesson but this serves to show people that a bad tune can and will cause catastrophic failure.
The stock OEM tune would have prevented this over-rev. Deleting, shutting off and changing these tables/settings, caused the LS3 to die a painful death.
R.I.P.
The stock OEM tune would have prevented this over-rev. Deleting, shutting off and changing these tables/settings, caused the LS3 to die a painful death.
R.I.P.
Last edited by LBear; Nov 2, 2010 at 12:43 AM.
Le Mans Master
Joined: Aug 2004
Posts: 5,259
Likes: 16
From: Monroe Township New Jersey
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
St. Jude donor in memory of jpee '14
Take another look at my post #38. Especially this part: Considering that I was the driver, I have a better perspective of the speed and track location than a spectator. It happened well before the 330' mark and easily less than 50 MPH, but the visual evidence (smoke) came later.
I normally hit the 330' mark around 4.8-4.9 seconds. My 0-60 MPH time is 3.2-3.3 seconds. The trans won't downshift to 1st above 40 MPH. I had my 1-2 shift set for 48 MPH.
Since I spun off the line my 60' was probably around a 2.0-2.1 and the 40 MPH would have been 100-150' feet out at the most after I backpedaled and then went WOT again.
The sequence of events happened quicker than anything that could have prevented it, except a lower rev limiter setting and my right foot.
I normally hit the 330' mark around 4.8-4.9 seconds. My 0-60 MPH time is 3.2-3.3 seconds. The trans won't downshift to 1st above 40 MPH. I had my 1-2 shift set for 48 MPH.
Since I spun off the line my 60' was probably around a 2.0-2.1 and the 40 MPH would have been 100-150' feet out at the most after I backpedaled and then went WOT again.
The sequence of events happened quicker than anything that could have prevented it, except a lower rev limiter setting and my right foot.
I have seen lots of engines, rears & trans destroyed .......... but Tom yours is right up there with the completely & totally blown to bits. You will have to let us know how the new engine install goes.
Hopefully others who have a similar tune will take note not to backpedal and then go to WOT
Team Owner
Joined: Mar 2005
Posts: 20,933
Likes: 905
From: salem OR
Lot of bad things can happen when we start modding these cars. Yessiree, lot of bad things.
{06 quicksilver ZO6 }
But to the majority of the time it doesn't. You always add the SCARE when it is not needed.
Lots of good happens too! First thing I do is start modding. Just because your mods never worked out. It should tell you something besides talking about the
gloom and doom of the mods. When It JUST AIN"T So.
You and mods, Just are not to be! Most all don't have any problems like this.
{06 quicksilver ZO6 }
But to the majority of the time it doesn't. You always add the SCARE when it is not needed.
Lots of good happens too! First thing I do is start modding. Just because your mods never worked out. It should tell you something besides talking about the
gloom and doom of the mods. When It JUST AIN"T So.
You and mods, Just are not to be! Most all don't have any problems like this.
Last edited by 3 Z06ZR1; Nov 2, 2010 at 03:18 AM.
Safety Car
Joined: Sep 2007
Posts: 4,359
Likes: 6
From: Los Alamitos California
St. Jude Donor '09
Lot of bad things can happen when we start modding these cars. Yessiree, lot of bad things.
But to the majority of the time it doesn't. You always add the SCARE when it is not needed.
Lots good happens too! First thing I do is start modding. Just because your mods never worked out should tell you something besides
gloom and doom of the mods.
You and MOds, Just are not to be! When It JUST AIN"T So.
Most all don't have any problems like this.
But to the majority of the time it doesn't. You always add the SCARE when it is not needed.
Lots good happens too! First thing I do is start modding. Just because your mods never worked out should tell you something besides
gloom and doom of the mods.
You and MOds, Just are not to be! When It JUST AIN"T So.
Most all don't have any problems like this.
San
Thread Starter
Race Director
Joined: Sep 2007
Posts: 16,557
Likes: 2,108
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
The portion of the early tune that remained was most likely a major contributor to the series of circumstances though.
I think it's possible to have the same results on a bone stock LS3 if the same conditions existed, so if anybody would like me to test that theory on their car, I'd be happy to oblige.
Just to be clear about the tune. I'll be using the same tune with the new engine, but setting the rev limiter values a little lower. I'll also never try to salvage some value from a bad launch either.
Last edited by HOXXOH; Nov 2, 2010 at 02:36 AM.
Team Owner
Joined: Aug 2003
Posts: 38,314
Likes: 35
I can't 100% blame just the tune. If that were the case, I would have grenaded the motor 2 years ago.
The portion of the early tune that remained was most likely a major contributor to the series of circumstances though.
I think it's possible to have the same results on a bone stock LS3 if the same conditions existed, so if anybody would like me to test that theory on their car, I'd be happy to oblige.
Just to be clear about the tune. I'll be using the same tune with the new engine, but setting the rev limiter values a little lower. I'll also never try to salvage some value from a bad launch either.
The portion of the early tune that remained was most likely a major contributor to the series of circumstances though.
I think it's possible to have the same results on a bone stock LS3 if the same conditions existed, so if anybody would like me to test that theory on their car, I'd be happy to oblige.
Just to be clear about the tune. I'll be using the same tune with the new engine, but setting the rev limiter values a little lower. I'll also never try to salvage some value from a bad launch either.
Did you intend to leave the rev limiter set that high, or did you just forget to lower it when you retuned the car just prior to it popping?
If I am following your posts correctly, this tune which was last in the car prior to it crapping out, is a "mixture" of a home made tune, and a tune from a traveling tuner? Is this correct?
Anyway, with regard to the "scare", if the below videos after the engine taking a dump like that, aren't enough to scare people, then nothing will.
Team Owner
Joined: Aug 2003
Posts: 38,314
Likes: 35
More like busting a steer in the head with a sledge hammer, electrocuting hogs, or shooting a lame horse in the head with a large caliber firearm.......it was quick and painless. It didn't suffer.
There was no smoking, no knocking, no bucking, no, none of that.
It was over real quick and painless.
BANG, and that was it. The engine never got a chance to go into any kind of long death throes before it was over.
If you are going to kill a motor, then that's the best way to do it. Quick and painless.
Did Patrick Swayze try Pepto Bismol before going to the trouble of going through chemotherapy?
Last edited by '06 Quicksilver Z06; Nov 2, 2010 at 03:19 AM.
Team Owner
Joined: Mar 2005
Posts: 20,933
Likes: 905
From: salem OR
Thread Starter
Race Director
Joined: Sep 2007
Posts: 16,557
Likes: 2,108
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
Just curious here HOXXOH, as to why the rev limiter values were left where they were after the final tune before the motor popped.
Did you intend to leave the rev limiter set that high, or did you just forget to lower it when you retuned the car just prior to it popping?
If I am following your posts correctly, this tune which was last in the car prior to it crapping out, is a "mixture" of a home made tune, and a tune from a traveling tuner? Is this correct?
Anyway, with regard to the "scare", if the below videos after the engine taking a dump like that, aren't enough to scare people, then nothing will.
Did you intend to leave the rev limiter set that high, or did you just forget to lower it when you retuned the car just prior to it popping?
If I am following your posts correctly, this tune which was last in the car prior to it crapping out, is a "mixture" of a home made tune, and a tune from a traveling tuner? Is this correct?
Anyway, with regard to the "scare", if the below videos after the engine taking a dump like that, aren't enough to scare people, then nothing will.
#1 local dyno tune fuel, spark, TQ mgmt. and fans only.
#2 traveling tuner - street tune with unknown engine changes, but readily noticeable tranny differences.
#3 local dyno tune fuel and spark only
#4 local street tune to remove traveling tuners tranny tune and return to stock tranny values and #1 tune TQ mgmt.
#5+ (done by myself) WOT shift point values bumped 100 rpm for 1-2 and 2-3 shift and 200 rpm for the 3-4 shift.
Since none of the tunes except #2 had changes in the rev limiter table, there was no reason to review that area, so the values remained unknown. It's not like a tuner changes or looks at all the values when doing a tune. I guess you could revert back to a stock tune and then copy/paste or use the compare feature to be assured of any changes from stock, but that method is time consuming and clumsy, when the need is to just tweak what already exists.
Scarry videos? Maybe to some people who have many fears. Will it stop me or other like-minded people from modding? Not a chance.
