Internal/External?
November 21st, 2012, 07:40 PM
#2
Forgot to add that the last time I built this engine the machine shop balanced it and had my balancer and flexplate but there are no signs of adding weight or taking weight away from either.
November 22nd, 2012, 07:54 AM
#3
Registered User
Join Date: Sep 2011
Location: Plano, TX
Posts: 1,844
Olds engines are external balance from the factory. Switching to internal takes significant work on the crank. So if you didn't pay someone for that, then you have an external balance.
The flexplate should have a weight on the back, just a curved piece of metal welded on. Most shops focus on the crank when doing the balancing so you can, in theory, swap out balancers and flexplates as necessary.
Note that the new flexplate *will* have a different balance. It may or may not be worth rebalancing the entire assembly, though.
The flexplate should have a weight on the back, just a curved piece of metal welded on. Most shops focus on the crank when doing the balancing so you can, in theory, swap out balancers and flexplates as necessary.
Note that the new flexplate *will* have a different balance. It may or may not be worth rebalancing the entire assembly, though.
November 22nd, 2012, 09:16 AM
#4
Old(s) Fart
Join Date: Mar 2007
Location: Northern VA
Posts: 47,259
Olds engines are external balance from the factory. Switching to internal takes significant work on the crank. So if you didn't pay someone for that, then you have an external balance.
The flexplate should have a weight on the back, just a curved piece of metal welded on. Most shops focus on the crank when doing the balancing so you can, in theory, swap out balancers and flexplates as necessary.
Note that the new flexplate *will* have a different balance. It may or may not be worth rebalancing the entire assembly, though.
The flexplate should have a weight on the back, just a curved piece of metal welded on. Most shops focus on the crank when doing the balancing so you can, in theory, swap out balancers and flexplates as necessary.
Note that the new flexplate *will* have a different balance. It may or may not be worth rebalancing the entire assembly, though.
November 22nd, 2012, 10:18 AM
#5
Thanks guys. This is pretty much what I figured but wanted to be sure.
I'll be swapping out a Mondello heavy inertia wheel for a lightweight SFI replacement from Rocket Racing.
The Inertia wheel does have a weight bolet to it and my 445 is a 68 block with a 70 N crank.
I'll be swapping out a Mondello heavy inertia wheel for a lightweight SFI replacement from Rocket Racing.
The Inertia wheel does have a weight bolet to it and my 445 is a 68 block with a 70 N crank.
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danlonchar
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