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SVT Shelby GT500
GT500 Stock Part Failures
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<blockquote data-quote="Tob" data-source="post: 14996293" data-attributes="member: 83412"><p>John, the best part about this thread is your attitude. You've remained completely objective and didn't run off onto an opinionated rant about how lousy these cars really are. You simply addressed each failure and moved on to the next one. Huge thanks for that.</p><p></p><p>And I thank you for documenting each failure mode so well. We've all seen the factory driveshaft fail (in photos, that is) and the mode there is rather consistent, just where the tubing diameter abruptly changes. What is interesting is that you were at such a relatively low power number when it happened, albeit with some sticky rubber and what sounds like a pretty brutal launch technique.</p><p></p><p>The upper control arm failure is fascinating. The base material looks to have yielded at the heat affected zone from weldment. I've never seen one tear that way but it makes sense given the soft bushing/deflection and the conditions it was under. Immediately made me think of the Roush upper and the added strap that wraps around this area and ties it back to the main arm for additional strength.</p><p></p><p>The material in your cat failure doesn't look like substrate but rather the matting that is sandwiched between the substrate and the outer shell. Is there something we aren't seeing such as material that blew out from one side to the other (or further downstream in the exhaust)? Doesn't look like the typical "meltdown" failure we see every now and then.</p><p></p><p>The axle and clutch failures are fairly typical, including the spun tube. As you mentioned, good to hear you weren't at speed when they gave way.</p><p></p><p>Huge thanks for documenting all of this in an organized and articulate manner John. Looks like you have a knack for finding weak points yet still remain level headed about it. I hope you're nearing a point where you can reliably abuse the car without having to continually fortify it.</p><p></p><p><em>Superb</em> thread.</p><p></p><p>Tob</p></blockquote><p></p>
[QUOTE="Tob, post: 14996293, member: 83412"] John, the best part about this thread is your attitude. You've remained completely objective and didn't run off onto an opinionated rant about how lousy these cars really are. You simply addressed each failure and moved on to the next one. Huge thanks for that. And I thank you for documenting each failure mode so well. We've all seen the factory driveshaft fail (in photos, that is) and the mode there is rather consistent, just where the tubing diameter abruptly changes. What is interesting is that you were at such a relatively low power number when it happened, albeit with some sticky rubber and what sounds like a pretty brutal launch technique. The upper control arm failure is fascinating. The base material looks to have yielded at the heat affected zone from weldment. I've never seen one tear that way but it makes sense given the soft bushing/deflection and the conditions it was under. Immediately made me think of the Roush upper and the added strap that wraps around this area and ties it back to the main arm for additional strength. The material in your cat failure doesn't look like substrate but rather the matting that is sandwiched between the substrate and the outer shell. Is there something we aren't seeing such as material that blew out from one side to the other (or further downstream in the exhaust)? Doesn't look like the typical "meltdown" failure we see every now and then. The axle and clutch failures are fairly typical, including the spun tube. As you mentioned, good to hear you weren't at speed when they gave way. Huge thanks for documenting all of this in an organized and articulate manner John. Looks like you have a knack for finding weak points yet still remain level headed about it. I hope you're nearing a point where you can reliably abuse the car without having to continually fortify it. [I]Superb[/I] thread. Tob [/QUOTE]
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