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SVT Shelby GT500
Here is what an ugly night at the track looks like
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<blockquote data-quote="Catmonkey" data-source="post: 16477238" data-attributes="member: 124025"><p>These are really long stroke engines and there are a lot of crankshaft harmonics involved. Another consideration is to NEVER reuse a torque-to-yield bolt. I'm not saying that's the issue here, but I have removed my balancer on a few occasions and the bolts were tight. I don't ever recall using locktite. I always replaced mine with new hardware. I'm now using the Kinetik crank saver. After seeing their cutaway, the crank bolt is largely unsupported outside of what threads into the crankshaft. The oil pump gears are also impaled through the crank snout. Do you know if this engine has stock gears or billet gears? I'd be curious to see how they fared though the carnage. </p><p></p><p>BJ is the only one I recall had an issue with an ATI balancer, but his hub cracked and it ate up the crank keyway. I think he detected some imbalance in the engine and found the problem before anything broke. The balancers can and do need to be rebuilt periodically. Any idea how old this particular balancer was? Mine's 7 years old now. It's something I need to keep on the radar. </p><p></p><p>I'm not all that confident you're going to find a definitive answer to the exact cause of this, but if you have the ability to take pics or video of some of the broken components once it's apart, I'd like to see them.</p></blockquote><p></p>
[QUOTE="Catmonkey, post: 16477238, member: 124025"] These are really long stroke engines and there are a lot of crankshaft harmonics involved. Another consideration is to NEVER reuse a torque-to-yield bolt. I'm not saying that's the issue here, but I have removed my balancer on a few occasions and the bolts were tight. I don't ever recall using locktite. I always replaced mine with new hardware. I'm now using the Kinetik crank saver. After seeing their cutaway, the crank bolt is largely unsupported outside of what threads into the crankshaft. The oil pump gears are also impaled through the crank snout. Do you know if this engine has stock gears or billet gears? I'd be curious to see how they fared though the carnage. BJ is the only one I recall had an issue with an ATI balancer, but his hub cracked and it ate up the crank keyway. I think he detected some imbalance in the engine and found the problem before anything broke. The balancers can and do need to be rebuilt periodically. Any idea how old this particular balancer was? Mine's 7 years old now. It's something I need to keep on the radar. I'm not all that confident you're going to find a definitive answer to the exact cause of this, but if you have the ability to take pics or video of some of the broken components once it's apart, I'd like to see them. [/QUOTE]
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Here is what an ugly night at the track looks like
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