[Z06] Engine blew @ 129 mph at strip
06-04-2013, 12:56 PM
#42
Melting Slicks
This.....
Its why I am waiting for results before I do anything. The valve may be stronger and not break... but what else is the heavier valve doing at high RPM and what long term effects.
Last edited by propain; 06-04-2013 at 01:04 PM.
06-04-2013, 01:44 PM
#43
Seems his work was done a little over 4 years ago.
06-04-2013, 01:45 PM
#44
Le Mans Master
). So there had to be some preexisting wear that finally came to a head.
06-04-2013, 01:50 PM
#45
Melting Slicks
Well if its 4 years of "Drove it like he stole it" with track abuse and all... seems like it could be anything...
06-04-2013, 01:53 PM
#46
Burning Brakes
To answer a couple of questions
I was over 7000 Rs. But had done this many times. =. Driver error
After the first failer, we did re build heads. Same builder took them off later because of problems burning oil "2qts in 380 miles" after that repair car ran great.
CMS tuned the car, after a long haul of messing with other guys tune. It ran better than ever.
I may have pushed the Rs to much am am fully responable fo that. We will stay in touch with you guys after we in crack what's left of the engine, and yes pictures.
I need to take some responsablty as I took it and drove it hard at the strip, and a few times on the road. I would say the "vast majority" of the driving experiance was fully legal street driving. It is sad that we all are a bit uneasy due to the trigger of possible failer with this engine.
If I was 50 years old I would upgrade to a newer Z or a ZR1 my car has been paid for for years, and I put monies into other areas to make it better. I will keep it and pass it along to someone in years to come. It will be a great car when I sell it as I would never pass undisclosed damage to someone else.
I was over 7000 Rs. But had done this many times. =. Driver error
After the first failer, we did re build heads. Same builder took them off later because of problems burning oil "2qts in 380 miles" after that repair car ran great.
CMS tuned the car, after a long haul of messing with other guys tune. It ran better than ever.
I may have pushed the Rs to much am am fully responable fo that. We will stay in touch with you guys after we in crack what's left of the engine, and yes pictures.
I need to take some responsablty as I took it and drove it hard at the strip, and a few times on the road. I would say the "vast majority" of the driving experiance was fully legal street driving. It is sad that we all are a bit uneasy due to the trigger of possible failer with this engine.
If I was 50 years old I would upgrade to a newer Z or a ZR1 my car has been paid for for years, and I put monies into other areas to make it better. I will keep it and pass it along to someone in years to come. It will be a great car when I sell it as I would never pass undisclosed damage to someone else.
06-04-2013, 02:12 PM
#47
Premium Supporting Vendor
Well I don't want to speculate what the failure was until it is determined, but was the valvetrain package tested to determine the limiting speed?
06-04-2013, 02:18 PM
#48
From reading his prior posts, both his motors were cammed.
The first one cam only, failed in short order in late 2008 early 2009.
The second one, and the one which blew this past weekend, was done in February of 2009.
Will be interesting to see what the cause if death with this one was.
But 4 years with the cam and on the same springs, if he was on the same set of springs, probably didn't help things.
Last edited by '06 Quicksilver Z06; 06-04-2013 at 02:23 PM.
06-04-2013, 02:26 PM
#49
Melting Slicks
Well, if your motor blew, you wouldn't be "driving" it anywhere.
From reading his prior posts, both his motors were cammed.
The first one cam only, failed in short order in late 2008 early 2009.
The second one, and the one which blew this past weekend, was done in February of 2009.
Will be interesting to see what the cause if death with this one was.
But 4 years with the cam and on the same springs, if he was on the same set of springs, probably didn't help things.
From reading his prior posts, both his motors were cammed.
The first one cam only, failed in short order in late 2008 early 2009.
The second one, and the one which blew this past weekend, was done in February of 2009.
Will be interesting to see what the cause if death with this one was.
But 4 years with the cam and on the same springs, if he was on the same set of springs, probably didn't help things.
I seriously doubt he was on the same springs running SS valves and a Cam. Ya never know though...
06-04-2013, 03:02 PM
#50
Former Vendor
Steve i am very sorry to hear this... i know you have been through a lot with this car... really sucks to hear, as it was finally running as it should... please let me know if i can help in any way...
06-04-2013, 03:04 PM
#51
I have always wondered if some that thought the track cars were cooking guides from heat were actually wearing prematurely from worn springs. Seems odd my car and my friends car both had guides in spec with cams (1 in 10 anecdotally from what we've seen?), coincidentally while using PSI springs, not OEM springs. Again, who knows.
06-04-2013, 03:04 PM
#52
Le Mans Master
As promised. What's wrong with this picture? 
06-04-2013, 03:18 PM
#53
I have always wondered if some that thought the track cars were cooking guides from heat were actually wearing prematurely from worn springs. Seems odd my car and my friends car both had guides in spec with cams (1 in 10 anecdotally from what we've seen?), coincidentally while using PSI springs, not OEM springs. Again, who knows.
What influence do you think worn springs have over wearing out guides? Just curious what you think the relationship is.
I do find your theory interesting. It would be very interesting if the fix all along was to change out the valve springs. It wouldn't be too dissimilar to what plagued the LS6. Though those failed in a different way.
06-04-2013, 03:29 PM
#55
Melting Slicks
I need to take some responsablty as I took it and drove it hard at the strip, and a few times on the road.
What is wrong with you?how old are you? you can't take responsibility for anything, my god, blame someone, something...lol
What is wrong with you?how old are you? you can't take responsibility for anything, my god, blame someone, something...lol
06-04-2013, 03:30 PM
#56
I had the same thoughts. GM does seem to make similar mistakes throught the years.
06-04-2013, 04:29 PM
#57
Le Mans Master
Yes, it was.
http://forums.corvetteforum.com/c6-z...hat-noise.html
Apologies for derailing the thread. Just thought it interesting to note that there are other things to worry about than the springs, the guides and the SS valves in these engines when modified.
http://forums.corvetteforum.com/c6-z...hat-noise.html
Apologies for derailing the thread. Just thought it interesting to note that there are other things to worry about than the springs, the guides and the SS valves in these engines when modified.
06-04-2013, 04:45 PM
#58
Drifting
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Sorry to hear op. and as much as I hate to say it. sounds like an ss valve failed on you. that or a valve spring. if the guides are checked and out of spec. then thats all I'll need to know and at that point I'll be selling. as much as I love the car it wasn't built well it seems. and I've been wanting to mod a ctsv anyway
Last edited by z0sicktanner; 06-04-2013 at 04:50 PM.
06-04-2013, 04:48 PM
#59
Melting Slicks
Sorry to hear op. and as much as I hate to say it. sounds like an ss valve failed on you. that or a valve spring. if the guides are checked and out of spec. then thats all I'll need to know and at that point I'll be selling. as much as I love the car it wasn't built well it seems
Yes it does. Now to the other questions: Why.
How many miles on the car since the build?
Im surprised to hear this attitude from you Tanner. But I agree... if doing all the head work with the guides and the SS valve still failed.... well.... as I always feared, its a much bigger problem than just throwing stronger parts at it.
Last edited by propain; 06-04-2013 at 04:50 PM.
06-04-2013, 04:57 PM
#60
Drifting
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Yes it does. Now to the other questions: Why.
How many miles on the car since the build?
Im surprised to hear this attitude from you Tanner. But I agree... if doing all the head work with the guides and the SS valve still failed.... well.... as I always feared, its a much bigger problem than just throwing stronger parts at it.
How many miles on the car since the build?
Im surprised to hear this attitude from you Tanner. But I agree... if doing all the head work with the guides and the SS valve still failed.... well.... as I always feared, its a much bigger problem than just throwing stronger parts at it.
