Balancing question
#1
TECH Regular
Thread Starter
iTrader: (8)
Join Date: Sep 2002
Location: Byron, IL
Posts: 482
Likes: 0
Received 0 Likes
on
0 Posts
Balancing question
I had a short block built that was balanced with a stock crank. If I were to put another stock crank in it with the same rods and pistons, do I need to have it rebalanced? Or are stock cranks usually pretty close to one another?
#3
TECH Addict
iTrader: (59)
Join Date: Oct 2004
Location: Vance, Alabama
Posts: 2,357
Likes: 0
Received 0 Likes
on
0 Posts
When you balance a rotating assembly you weight match the rods and pistons and balance the crank to those items. If the shop that done the work keep good records they will have it documented of how much weight your stuff was and they will be able to spin your new crank and see if its need or not.
#5
On The Tree
Join Date: Dec 2003
Location: Bloomington, MN
Posts: 179
Likes: 0
Received 0 Likes
on
0 Posts
Just bring it all in and have the assm. balanced you can allways improve on the factory balance jobs although the ls-1's are balanced closer than the older sbc's
#6
TECH Addict
iTrader: (14)
Join Date: Nov 2002
Location: hurst tx
Posts: 2,560
Likes: 0
Received 0 Likes
on
0 Posts
It all depends how the shop balanced the motor, the one I use, they balance all the part individually and then assemble and balance the entire thing, to make sure crank is right.
The reason they do this, is now you can swap pistons or rods and just have them rebalanced, not the entire rotating assembly
ed
The reason they do this, is now you can swap pistons or rods and just have them rebalanced, not the entire rotating assembly
ed
#7
TECH Apprentice
If your engine was built for you using the stock components then another crank that's stock should be fine. If your engine was built with different pistons/pins etc they may weigh more or less then stock. If they are a different weight then your crank should be rebalanced to suit. Ls1 stock parts are very evenly weight matched imho