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Keying the crank.

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Old Jul 7, 2004 | 10:03 AM
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Default Keying the crank.

Obviously, it is smart to key the crank for superchargers with high boost levels and/or large impellers. But is it necessary on the P1 ProCharger running only 5 PSI?
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Old Jul 7, 2004 | 10:22 AM
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Default Re: Keying the crank. (Scissors)

Yes! I recomend doing a search in archives. lots of doom stories there.
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Old Jul 7, 2004 | 10:32 AM
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Default Re: Keying the crank. (Scissors)

It is not healthy for the balancer and pulley wobbleing loose and tearing up the engine compartment. I am aware it is a pain to do the pin's but it is great insurance and peace of mind for you as well. Good Luck

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Old Jul 7, 2004 | 11:13 AM
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Default Re: Keying the crank. (Scissors)

Obviously, it is smart to key the crank for superchargers with high boost levels and/or large impellers. But is it necessary on the P1 ProCharger running only 5 PSI?
Knowing what I know now, I'd key the crank on any LSX engine in a corvette regardless of having a s/c or not!
IMHO it's not if it will come loose, but WHEN it WILL
But then; GM saved $0.50 on every engine
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Old Jul 7, 2004 | 11:57 AM
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Default Re: Keying the crank. (drcoffee)

Yes! I recomend doing a search in archives. lots of doom stories there.
I did, but I didn't see anyone specifically mention this setup (which is the one least likely to spin the balancer.)
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Old Jul 7, 2004 | 01:32 PM
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Default Re: Keying the crank. (Scissors)

Not worth the risk of popping your motor when the damper spins off. Just follow the directions and do the "key."
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Old Jul 7, 2004 | 07:54 PM
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Default Re: Keying the crank. (BHP)

It doesn't seem like it should spin, but it will eventually. You can just risk it, the most likely worst case is you get stuck somewhere and have to tow the car home.
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Old Jul 7, 2004 | 08:40 PM
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Default Re: Keying the crank. (Terry Burger)

It's a must
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Old Jul 8, 2004 | 01:35 PM
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Default

I did, but I didn't see anyone specifically mention this setup (which is the one least likely to spin the balancer.)
What the heck, it can't come completly off the steering rack will stop it[U]
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Old Jul 8, 2004 | 01:42 PM
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Just do it...
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Old Jul 8, 2004 | 04:21 PM
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Good for peace of mind...
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Old Jul 9, 2004 | 08:34 AM
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Better safe than sorry!
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Old Jul 9, 2004 | 09:31 AM
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Yes you need to pin the crank.

VR
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Old Jul 9, 2004 | 03:43 PM
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Default

Originally Posted by corvettebob1
Knowing what I know now, I'd key the crank on any LSX engine in a corvette regardless of having a s/c or not!
IMHO it's not if it will come loose, but WHEN it WILL
But then; GM saved $0.50 on every engine
Sorry, but I disagree with this statement. I don't mean to downplay the importance of pinning the crank on a highly upgraded motor, but saying that a crank should be pinned whether s/c or not is stretching it a bit, IMHO. I personally have owned 3 LS1 cars. Two were mildly modded (300hp stock, I was running about 350hp and 340 ft/lbs). I've not once ever had a problem because the crank wasn't pinned or "keyed". And this is after 1/4 mile runs, many laps on the track, and hard street driving.

This isn't to say that it shouldn't be done for heavy mods like FI, Turbo, major head/cam work, or Nitrous. But I just wanted to clarify and insure that people don't get overly concerned that they should just go and pin their crank for the heck of it.

My 0.02
-Smokey
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