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Old 01-29-2013, 11:23 PM   #41
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hmm idk if it would be worth the money
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Old 01-29-2013, 11:47 PM   #42
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Crankshaft has broken 3 times and has been out for more than 2 years now
Was that a stock crank or a modified stock crank?
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Old 01-29-2013, 11:53 PM   #43
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whos crank broke?
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Old 01-30-2013, 12:38 AM   #44
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The guy that ran 10.19 from Puerto Rico. Mother focus said he broke 3 cranks.

As far as a bullet crank, you wouldn't ever break one of those.
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Old 01-30-2013, 12:49 AM   #45
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And as far as strengthing/hardening the stock crank it can work but I will see this summer as I am working with the stock crank trying a couple of things.
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Old 01-30-2013, 05:53 AM   #46
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It was a stock crank, should hold about 650whp.
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Old 01-30-2013, 06:33 AM   #47
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several years ago when tom had his drag car he started breaking cranks but i think he was pushing to over 800hp. he pulled the power back down to 735whp i think and he didnt breaking them anymore i dont think. it seems like the real killer is the torque though. maybe he will pipe in and correct my memory if im wrong. im also curious about what torque he made. the hp was widely known but i dont remember ever seeing what the torque was.
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Old 01-30-2013, 06:49 AM   #48
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Maybe the tune, don't know who tuned it, at some point in timing and power they can be more susceptible. There's another focus in PR in around 750whp, that one has a billet crank, he thought about spraying at that point but the axles went, he is coming around now with aftermarket ones, never ran though.
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Old 01-30-2013, 09:00 AM   #49
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I did 723 and I also broke crankshafts , came down to about 630-650 and stopped braking the cranks
Hardening a stock Zetec cast crank wont help it rarely does with any crankshaft the hardness in only about .008 to .015 thick

Tom
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Old 01-30-2013, 09:12 AM   #50
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Awesome thanks for the info mother focus. What I am doing will help with strengthen the stock crank and will be a lot cheaper than a bullet crank. I will be doing testing this summer to make sure it does work before releasing info out
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