View Poll Results: If you have had catastrophic engine failure or a dropped valve: please check one
Voters: 21. You may not vote on this poll
[Z06] Poll on LS7's with dropped valves or catastrophic engine failure
06-26-2010, 06:49 PM
#1
Le Mans Master
Thread Starter
Poll on LS7's with dropped valves or catastrophic engine failure
Will be interesting to see the result
Statistics so far as of june 30,2010:
There have been 1082 viewers of this poll as of the moment I write this reply.
There have been 18 engines that have had catastrophic failure.
*This represents about 1.6% engine failure rate assuming all 1082 that viewed the post and of those 1082 those with catastrophic failure actually voted.
There have been 10 of those that are totally stock that have had catastrophic engine failure (No Tune and No Mod)
*This represents slightly less the 1% engine failure rate assuming all 1082 that viewed the post and of those 1082 those with catastrophic failure voted.
*It seems a tune has no impact on engine failure as there are more failures on stock tunes then there are tuned motors - this statement would assume half the viewers of the poll have tunes and half still remain with the stock tune.
1% engine failure rate or 1 in 100 - seems pretty high.
This should make the folks from GM that monitor our forum take notice.
Statistics so far as of june 30,2010:
There have been 1082 viewers of this poll as of the moment I write this reply.
There have been 18 engines that have had catastrophic failure.
*This represents about 1.6% engine failure rate assuming all 1082 that viewed the post and of those 1082 those with catastrophic failure actually voted.
There have been 10 of those that are totally stock that have had catastrophic engine failure (No Tune and No Mod)
*This represents slightly less the 1% engine failure rate assuming all 1082 that viewed the post and of those 1082 those with catastrophic failure voted.
*It seems a tune has no impact on engine failure as there are more failures on stock tunes then there are tuned motors - this statement would assume half the viewers of the poll have tunes and half still remain with the stock tune.
1% engine failure rate or 1 in 100 - seems pretty high.
This should make the folks from GM that monitor our forum take notice.
Last edited by Mr. Gizmo; 06-30-2010 at 02:41 PM.
06-26-2010, 08:10 PM
#3
Drifting
Option to those who blew up their engine more than once? I only voted once. I'm planning/saving for my 3rd motor. Lost my 2nd motor 2 weeks ago. FYI, my 2nd motor was built with durability (most moving parts are forged) in mind but still lost it due to the snapped exhaust valve (forge stainless steel exhaust valve). 1st motor lasted 17k miles (13k of the 17k miles was stock with only tune & KB CAI; 4k miles with lg cam & headers added bolt on) with ~35-40 track days (rr). 2nd motor only lasted 20k miles, ~18 track days & a handful of high speed runs (160-190+ mph runs). 2nd motor built with forged pistons, stock crank, are dry sump, stainless solid steel exhaust valve, crowler rocker arms, etc... Too much to list. I'm convinced base soley on my own experience & no one else that exhaust valves seems to be are the parts that I consider the weak link.
06-26-2010, 09:38 PM
#4
Le Mans Master
Thread Starter
Option to those who blew up their engine more than once? I only voted once. I'm planning/saving for my 3rd motor. Lost my 2nd motor 2 weeks ago. FYI, my 2nd motor was built with durability (most moving parts are forged) in mind but still lost it due to the snapped exhaust valve (forge stainless steel exhaust valve). 1st motor lasted 17k miles (13k of the 17k miles was stock with only tune & KB CAI; 4k miles with lg cam & headers added bolt on) with ~35-40 track days (rr). 2nd motor only lasted 20k miles, ~18 track days & a handful of high speed runs (160-190+ mph runs). 2nd motor built with forged pistons, stock crank, are dry sump, stainless solid steel exhaust valve, crowler rocker arms, etc... Too much to list. I'm convinced base soley on my own experience & no one else that exhaust valves seems to be are the parts that I consider the weak link.
GM tech i have spoken to, says every ls7 that he has seen that comes in thats blown apart has a tune, if you leave the tune alone, he says these motors will last forever. This guy is a hot rodder - has a 2005 c6 with a blower on it.
The poll so far has stock engine no mods and stock tune blowing up 2 to 1 over modded or tuned LS7's.
Last edited by Mr. Gizmo; 06-26-2010 at 11:06 PM.
06-26-2010, 10:55 PM
#8
Le Mans Master
Thread Starter
06-26-2010, 10:58 PM
#9
Le Mans Master
Thread Starter
Of course no problems will overwhelmingly outweigh catastrophic failure and thats not the intent of the poll.
The point of the poll is to look at only those LS7's that have come apart, and then look at mods, tune, versus completely stock.
So far the stock no tune cars are blowing apart more then the tuned or modded cars.
The point of the poll is to look at only those LS7's that have come apart, and then look at mods, tune, versus completely stock.
So far the stock no tune cars are blowing apart more then the tuned or modded cars.
06-26-2010, 11:08 PM
#10
Burning Brakes
Does model year have anything to do with it or is it ALL 427's ?
I would be interested to know if its a certain year or years .
I just bought an 06 .
I would be interested to know if its a certain year or years .
I just bought an 06 .
06-26-2010, 11:13 PM
#11
Le Mans Master
Thread Starter
I guess you can look at the profiles of those that answered the poll and see what year Z they have.
06-26-2010, 11:53 PM
#12
Le Mans Master
Of course no problems will overwhelmingly outweigh catastrophic failure and thats not the intent of the poll.
The point of the poll is to look at only those LS7's that have come apart, and then look at mods, tune, versus completely stock.
So far the stock no tune cars are blowing apart more then the tuned or modded cars.
The point of the poll is to look at only those LS7's that have come apart, and then look at mods, tune, versus completely stock.
So far the stock no tune cars are blowing apart more then the tuned or modded cars.
However, 3500 people answer and 350 say their engines went TU...well...I don't really care why, all 350 of 3500 couldn't have been shooting a 300 shot or something, and there is a huge issue at hand.
06-27-2010, 12:00 AM
#13
_"SCOTT"_
No need to worry about the exhaust valve issue "year specific"...they're all the same valves. As you've read from a previous post, even a stainless valve can fail...
06-27-2010, 12:20 AM
#15
Le Mans Master
You can't be serious maybe most novice of track rats, but with the long gears that's not even common imo........ on the street you would have to be a complete bafoon to do this.
06-27-2010, 12:25 AM
#16
Race Director
for 2 motors it was exhaust valve that gave way both times? did you have the hollow sodium filled on both failures?
GM tech i have spoken to, says every ls7 that he has seen that comes in thats blown apart has a tune, if you leave the tune alone, he says these motors will last forever. This guy is a hot rodder - has a 2005 c6 with a blower on it.
The poll so far has stock engine no mods and stock tune blowing up 2 to 1 over modded or tuned LS7's.
GM tech i have spoken to, says every ls7 that he has seen that comes in thats blown apart has a tune, if you leave the tune alone, he says these motors will last forever. This guy is a hot rodder - has a 2005 c6 with a blower on it.
The poll so far has stock engine no mods and stock tune blowing up 2 to 1 over modded or tuned LS7's.
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06-27-2010, 01:59 AM
#17
Safety Car
Would you like to see pictures of my remaining pistons with NO eye brows from PTV contact? You are suddenly some kind of friggin expert since yours lasted 100000 miles
06-27-2010, 03:36 AM
#19
Racer
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