Is the stock LS1 flywheel neutral balanced?
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From: Torrance CA
Is the stock LS1 flywheel neutral balanced?
I am putting in my 402 which is internally balanced. Is the stock flywheel neutral balanced or do I need to get it re-balanced? What about the clutch?
Melting Slicks
Joined: Nov 2004
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St. Jude Donor 05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17
Originally Posted by hpcubed
I am putting in my 402 which is internally balanced. Is the stock flywheel neutral balanced or do I need to get it re-balanced? What about the clutch?
Since your 402 is interally balanced all you will need to do is neutral balance the the flywheel and the pressure plate. The clutch plate needs to be balanced by it's self as it's position to the other parts is not fixed... 
Good luck with your adventure...
Melting Slicks
Joined: Nov 2004
Posts: 2,592
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St. Jude Donor 05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17
Originally Posted by TT_Vert-
since when is the ls1 externally balanced? The crank is not keyed so i dont see how that is possible
Dave
Dave
Racer
Joined: Sep 2005
Posts: 429
Likes: 0
From: lincoln nebraska
the motor (when externally balanced) is balanced via balancer and flywheel. Since there is no key, there is no guarantee that the balancer will be put back on oriented right. With that said, I saw no weights on my FW or balancer. Also, ive put on a different balancer and flywheel and I still have no vibration, so unless it is internally balanced, I just got lucky when putting on my new components to not have a balance. usually when a motor is externally balanced there is a keyway on the crank to properly locate the weight. On fords its a 28 or 50 oz. imbalance.
dave
dave
Racer
Joined: Oct 2001
Posts: 442
Likes: 2
From: San Clemente CA
Balance Mania
Hi,
The LS engines are not externally balanced.
Much of this confusion is caused by:
1.Chevy zero balances the flywheel and pressure plates as a unit so the flywheel alone may not be zero balanced
2.Chevy refines the balance of Vette engines after they are assembled by pressing small weights into pre-drilled holes in the flywheel & damper as determined by spinning the engine as an assembly
3.Chevy did not refine the balance of Camaros so they will not have the small weights
4.New replacement dampers are zero balanced
5.Used dampers from a Vette may not be zero balanced if they still have the weights installed
6.Aftermarket flywheels are zero balanced
7.Aftermarket pressure plates are zero balanced
So here are a few chooses when modifying your engine
1.To change only the flywheel or only the pressure plate, match balance to the old value
2.To change the flywheel & pressure plate together:
•match balance an aftermarket flywheel/pressure plate as a unit
•when using a new Chevy flywheel/pressure plate, you can transfer the small weights or match balance
Other options include going back to a zero balance damper & flywheel/clutch by removing all of the weight or zero balancing everything, which is as good as a Camaro balance
Good luck,
Steve
The LS engines are not externally balanced.
Much of this confusion is caused by:
1.Chevy zero balances the flywheel and pressure plates as a unit so the flywheel alone may not be zero balanced
2.Chevy refines the balance of Vette engines after they are assembled by pressing small weights into pre-drilled holes in the flywheel & damper as determined by spinning the engine as an assembly
3.Chevy did not refine the balance of Camaros so they will not have the small weights
4.New replacement dampers are zero balanced
5.Used dampers from a Vette may not be zero balanced if they still have the weights installed
6.Aftermarket flywheels are zero balanced
7.Aftermarket pressure plates are zero balanced
So here are a few chooses when modifying your engine
1.To change only the flywheel or only the pressure plate, match balance to the old value
2.To change the flywheel & pressure plate together:
•match balance an aftermarket flywheel/pressure plate as a unit
•when using a new Chevy flywheel/pressure plate, you can transfer the small weights or match balance
Other options include going back to a zero balance damper & flywheel/clutch by removing all of the weight or zero balancing everything, which is as good as a Camaro balance
Good luck,
Steve
Thread Starter
Pro
Joined: Apr 2001
Posts: 589
Likes: 0
From: Torrance CA
Originally Posted by SNW Vette
Hi,
The LS engines are not externally balanced.
Much of this confusion is caused by:
1.Chevy zero balances the flywheel and pressure plates as a unit so the flywheel alone may not be zero balanced
2.Chevy refines the balance of Vette engines after they are assembled by pressing small weights into pre-drilled holes in the flywheel & damper as determined by spinning the engine as an assembly
3.Chevy did not refine the balance of Camaros so they will not have the small weights
4.New replacement dampers are zero balanced
5.Used dampers from a Vette may not be zero balanced if they still have the weights installed
6.Aftermarket flywheels are zero balanced
7.Aftermarket pressure plates are zero balanced
So here are a few chooses when modifying your engine
1.To change only the flywheel or only the pressure plate, match balance to the old value
2.To change the flywheel & pressure plate together:
•match balance an aftermarket flywheel/pressure plate as a unit
•when using a new Chevy flywheel/pressure plate, you can transfer the small weights or match balance
Other options include going back to a zero balance damper & flywheel/clutch by removing all of the weight or zero balancing everything, which is as good as a Camaro balance
Good luck,
Steve
The LS engines are not externally balanced.
Much of this confusion is caused by:
1.Chevy zero balances the flywheel and pressure plates as a unit so the flywheel alone may not be zero balanced
2.Chevy refines the balance of Vette engines after they are assembled by pressing small weights into pre-drilled holes in the flywheel & damper as determined by spinning the engine as an assembly
3.Chevy did not refine the balance of Camaros so they will not have the small weights
4.New replacement dampers are zero balanced
5.Used dampers from a Vette may not be zero balanced if they still have the weights installed
6.Aftermarket flywheels are zero balanced
7.Aftermarket pressure plates are zero balanced
So here are a few chooses when modifying your engine
1.To change only the flywheel or only the pressure plate, match balance to the old value
2.To change the flywheel & pressure plate together:
•match balance an aftermarket flywheel/pressure plate as a unit
•when using a new Chevy flywheel/pressure plate, you can transfer the small weights or match balance
Other options include going back to a zero balance damper & flywheel/clutch by removing all of the weight or zero balancing everything, which is as good as a Camaro balance
Good luck,
Steve
Last edited by hpcubed; Dec 2, 2005 at 11:32 AM.
Pro
Joined: Feb 2004
Posts: 657
Likes: 1
From: michigan
Originally Posted by SNW Vette
Hi,
The LS engines are not externally balanced.
Much of this confusion is caused by:
1.Chevy zero balances the flywheel and pressure plates as a unit so the flywheel alone may not be zero balanced
2.Chevy refines the balance of Vette engines after they are assembled by pressing small weights into pre-drilled holes in the flywheel & damper as determined by spinning the engine as an assembly
3.Chevy did not refine the balance of Camaros so they will not have the small weights
4.New replacement dampers are zero balanced
5.Used dampers from a Vette may not be zero balanced if they still have the weights installed
6.Aftermarket flywheels are zero balanced
7.Aftermarket pressure plates are zero balanced
So here are a few chooses when modifying your engine
1.To change only the flywheel or only the pressure plate, match balance to the old value
2.To change the flywheel & pressure plate together:
•match balance an aftermarket flywheel/pressure plate as a unit
•when using a new Chevy flywheel/pressure plate, you can transfer the small weights or match balance
Other options include going back to a zero balance damper & flywheel/clutch by removing all of the weight or zero balancing everything, which is as good as a Camaro balance
Good luck,
Steve
The LS engines are not externally balanced.
Much of this confusion is caused by:
1.Chevy zero balances the flywheel and pressure plates as a unit so the flywheel alone may not be zero balanced
2.Chevy refines the balance of Vette engines after they are assembled by pressing small weights into pre-drilled holes in the flywheel & damper as determined by spinning the engine as an assembly
3.Chevy did not refine the balance of Camaros so they will not have the small weights
4.New replacement dampers are zero balanced
5.Used dampers from a Vette may not be zero balanced if they still have the weights installed
6.Aftermarket flywheels are zero balanced
7.Aftermarket pressure plates are zero balanced
So here are a few chooses when modifying your engine
1.To change only the flywheel or only the pressure plate, match balance to the old value
2.To change the flywheel & pressure plate together:
•match balance an aftermarket flywheel/pressure plate as a unit
•when using a new Chevy flywheel/pressure plate, you can transfer the small weights or match balance
Other options include going back to a zero balance damper & flywheel/clutch by removing all of the weight or zero balancing everything, which is as good as a Camaro balance
Good luck,
Steve
