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Old 12-08-2013, 12:04 AM   #1
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Keying a crank?

What exactly does "keying a crank" do
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Old 12-08-2013, 12:10 AM   #2
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It locks the harmonic balancer with the crankshaft. And allows zero rotation of the harmonic balancer with respect to the crankshaft. So the harmonic balancer rotates "with" the crankshaft at all times. This prevents the harmonic balancer/damper from rotating on the crankshaft. Most if not all older engines "were" keyed from the factory. Some new engines aren't keyed from the factory. Harmonic balancer/damper is bolted into the end of the crankshaft, that bolt is the only thing keeping the damper from rotating on the crankshaft. Blown motors have a belt that the crank pulley/damper drives and the extra load on that pulley can cause the damper to rotate on the crank, a keyed crank prevents this.
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Old 12-08-2013, 12:15 AM   #3
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Quote:
Originally Posted by Ercmann View Post
It locks the harmonic balancer with the crankshaft. And allows zero rotation of the harmonic balancer with respect to the crankshaft. So the harmonic balancer rotates "with" the crankshaft at all times.
Im assuming that is needed with high horsepower engines? or do people do that with normal engines?
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Old 12-08-2013, 12:20 AM   #4
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Quote:
Originally Posted by 94 camaro View Post
Im assuming that is needed with high horsepower engines? or do people do that with normal engines?
High HP.... ^^^ I edited my post. Added more info
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Old 12-08-2013, 12:25 AM   #5
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High HP.... ^^^ I edited my post. Added more info
ah i didnt see your edit lol. thanks for this bit of info. so would someone need their crank keyed if they were making 400 rwhp?
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Old 12-08-2013, 12:32 AM   #6
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Quote:
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ah i didnt see your edit lol. thanks for this bit of info. so would someone need their crank keyed if they were making 400 rwhp?
No, not really, but it wouldn't hurt either.
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Old 12-08-2013, 12:33 AM   #7
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Slowass didn't have the crank pinned.
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Old 12-08-2013, 12:34 AM   #8
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No, not really, but it wouldn't hurt either.
would it be expensive to have done?
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Old 12-08-2013, 12:37 AM   #9
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would it be expensive to have done?
Depends on your definition of expensive. I would guess at least a couple hundred dollars. Not really sure about the cost. @ Mr. Luos.......... Didn't The member Ovrkill have that problem with his on his fist test drive??? I remember someone on here having that issue. And wound up pinning his.
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mod-thread-178452/
http://www.camarozone.com/forum/f27/...m-poll-180546/

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Old 12-08-2013, 12:39 AM   #10
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Depends on your definition of expensive. I would guess at least a couple hundred dollars. Not really sure about the cost.
ah okay well thanks i appreciate your help
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Old 12-08-2013, 12:40 AM   #11
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You are welcome.
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"It's better to have it and not need it, than to need it and not have it"
http://www.camarozone.com/forum/f18/erics-01-ss-
mod-thread-178452/
http://www.camarozone.com/forum/f27/...m-poll-180546/
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Old 12-08-2013, 12:52 AM   #12
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Quote:
Originally Posted by Ercmann View Post
@ Mr. Luos.......... Didn't The member Ovrkill have that problem with his on his fist test drive??? I remember someone on here having that issue. And wound up pinning his.
Yeah, that was him.
That was the only car I have ever read about loosing the bolt on an N/A build. Strange things can happen when you start making 650 at the wheels without nitrous or boost.


Kit runs $135 or so. Plus install
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