Dragstrip damage w/ pics... anyone ever done this?
11-13-2006, 07:58 PM
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Dragstrip damage w/ pics... anyone ever done this? I went to a track rental this past Saturday. I managed to run a new best of 11.18 @ 120. I backed that pass up with a 11.21 @ 121. I thought about calling it a day but decided to push my luck. I managed to line up next to a C6 Z06 which I intended to educate. I launched and got to the top of first gear when all hell broke loose. I managed to shear off all 3 converter mounting studs. All the studs are still bolted to the flywheel. Has this happened to anyone else? I hope my flywheel in still in good shape. Pics below.... Enjoy
11-13-2006, 09:29 PM
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Originally Posted by Hugger
I went to a track rental this past Saturday. I managed to run a new best of 11.18 @ 120. I backed that pass up with a 11.21 @ 121. I thought about calling it a day but decided to push my luck. I managed to line up next to a C6 Z06 which I intended to educate. I launched and got to the top of first gear when all hell broke loose. I managed to shear off all 3 converter mounting studs. All the studs are still bolted to the flywheel. Has this happened to anyone else? I hope my flywheel in still in good shape. Pics below.... Enjoy
Flywheel bolts holes egged shapped ?
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11-13-2006, 11:32 PM
#8
wouldn't the Eggshaped holes have been caused by the foot breaking off the TC and the stress of the other 2 holding it? or would it be that the Bolts loosened up over time and started "egging" until it was enough force to break the Foot?
11-14-2006, 08:46 AM
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Originally Posted by waterbug1999
You mean like this??
TC bolts got loose. Check to make sure the TC bolts tighten down all the way. I have seen a few converters were the bolts wound up being like 0.05 to 0.10 to long and it feels like its tight when its not. when the bolts let the flywheel slip around the sudden impacting force break the ears off the converter.Just a heads up for ya.
11-14-2006, 09:04 AM
#13
Originally Posted by CollinsAutomotive
TC bolts got loose. Check to make sure the TC bolts tighten down all the way. I have seen a few converters were the bolts wound up being like 0.05 to 0.10 to long and it feels like its tight when its not. when the bolts let the flywheel slip around the sudden impacting force break the ears off the converter.Just a heads up for ya.
I agree with the loose bolts.
11-14-2006, 12:28 PM
#14
Originally Posted by CollinsAutomotive
TC bolts got loose. Check to make sure the TC bolts tighten down all the way. I have seen a few converters were the bolts wound up being like 0.05 to 0.10 to long and it feels like its tight when its not. when the bolts let the flywheel slip around the sudden impacting force break the ears off the converter.Just a heads up for ya.
11-14-2006, 12:56 PM
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Funny you should post Yank.... Because it is indeed one of you converters. I had the internals rebuilt by another company but the external parts are all yours!!! The bolts are still FIRMLY bolted to the flywheel. They even have high strentgh loctite on them. Pics below
11-14-2006, 01:00 PM
#16
Looking at the converter i would say the bolts werent to long since there appear to be plenty of threads still left on the converter part , and the werent loose either i can see , very strange as i said have never seen that happen before.
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11-14-2006, 01:11 PM
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thats exactly how mine was broken. the converter worked for its previous owner, and worked for me for quite a while before that. I threw the converter in the trash and bought a new one. the new converter foot is a different design and now looks better and to be part of the casing, and not a welded foot like the older models.
11-14-2006, 01:16 PM
#18
I was going to say i was looking at the pic and zoomed and realized it broke at the weld,
Of note though on a way this might be avoided on this type I noted it was threaded considerably deeper than the lug weld, So though it wont help in his instance for anyone else using converters with this type welded lugs using longer bolts to pass through the weld should help to assure this dosent happen ,
Of note though on a way this might be avoided on this type I noted it was threaded considerably deeper than the lug weld, So though it wont help in his instance for anyone else using converters with this type welded lugs using longer bolts to pass through the weld should help to assure this dosent happen ,
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11-14-2006, 01:29 PM
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Originally Posted by Hugger
Funny you should post Yank.... Because it is indeed one of you converters. I had the internals rebuilt by another company but the external parts are all yours!!! The bolts are still FIRMLY bolted to the flywheel. They even have high strentgh loctite on them. Pics below
11-14-2006, 02:13 PM
#20
Yes, that is an old design that was stopped about 4.5 years ago that about 3500 have been sold for LS-1 cars and you can see that the bolts have shifted in the flexplate.
also if the converter runout is high after it was rebuilt it will work the lugs on the flexplate and cause a stress point.
One thing we we have found is that we do not paint the converter mounting lugs as the paint will displace with time and allow the bolts to loose torque even with thread locker applied.
also if the converter runout is high after it was rebuilt it will work the lugs on the flexplate and cause a stress point.
One thing we we have found is that we do not paint the converter mounting lugs as the paint will displace with time and allow the bolts to loose torque even with thread locker applied.