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Old 09-27-2016, 05:31 PM   #1
Stephen12ZL1


 
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Pics of what happens when a valve drops at approx 7K rpm

These pics are merely informative...no blame or some vendor sold an incorrect part. Also, this wasn't the stock LS7. The replacement will be a stock LS7.
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'21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60'
'17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold)
'15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold)
'12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)
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Old 09-27-2016, 05:40 PM   #2
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OUCH!!!
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Old 09-27-2016, 06:12 PM   #3
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Old 09-27-2016, 06:14 PM   #4
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Holy shit...
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A/C and audio
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Old 09-27-2016, 06:21 PM   #5
I4toV8
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ouch!!
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Old 09-27-2016, 06:25 PM   #6
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Been there and done that!!! Insert sad face here.
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Old 09-27-2016, 06:30 PM   #7
KaBoom1701
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Wow, were you at the track?
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Old 09-27-2016, 07:49 PM   #8
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Dang that's some carnage. What caused the valve to drop?
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Old 09-27-2016, 07:58 PM   #9
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Quote:
Originally Posted by KaBoom1701 View Post
Wow, were you at the track?
yes, 2nd lap and boom...it was more like a gurgle. This engine had 2K hard track miles...
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'21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60'
'17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold)
'15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold)
'12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)

Last edited by Stephen12ZL1; 09-29-2016 at 03:06 AM.
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Old 09-27-2016, 08:00 PM   #10
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Quote:
Originally Posted by Rrm20151le View Post
Dang that's some carnage. What caused the valve to drop?
I can guess that it was a simple keeper failure or a geometry issue...not sure. The only thing I'm sure of is a stock LS7, headers, and tune will be my next track setup.
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'21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60'
'17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold)
'15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold)
'12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)
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Old 09-27-2016, 08:03 PM   #11
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hs..so sad to see that! yet IMO 7K is too high rpm for the LS engine. just IMHO
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Old 09-27-2016, 08:36 PM   #12
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I feel your pain...
No really I've been there a few times myself
So far my Z28 is holding up very well
I'm also going to keep the engine mostly stock and work on my driving skills
Best to you
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Old 09-27-2016, 08:39 PM   #13
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Stephen, I have followed your posts for a while now and I'm really sorry to see you pulling another engine out of your Z/28. Keep the faith, man. This is a great car and you push 'em pretty hard...just like they were meant to be.

Good luck with the new engine. I will be following along.
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Old 09-28-2016, 05:27 AM   #14
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Crap!
I was just about to do an intake, heads and a cam :(
Is this a common occurrence?
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