Confusing imbalance issue

maverickdragger · Oct 29, 2009

thats what im having done. its costing me 150 to have it done

baddad457 · Oct 29, 2009

Bryant said: ↑

it seems to me that some people here dont understand what balancing a motor is. its takeing the rods and pistons and weighing them. then grinding them to where they all weigh the same. next they take the crank wich should have an imblance of 50 oz or 28 oz, the balance and flex plate of flywheel both of wich will be made specificly for the imbalance of the crank, and bolt it all togther and put it on a balancing machine. now they have what is called bob weights. these are weights that they bolt onto the rod journals of the crank. the weights are adjusted to the weight of the rod, wrist pin, piston, and ring combination. now the machine spins the assembly and detects how much out of balance it is. it will tell you where the heavyest point of the imbalance is. now the machinest will either remove weight or add weight to the crank or sometimes the fly wheel/flexplate to achive a nutrual balance. when a motor is internaly balanced the flexplate/flywheel and balancer will have 0 imblance built into them. all the balancing is done on the crank and is usually pretty expensive because it requires use of malory metal wich is very heavy and expencive.
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All good info, but balancing is not expensive due to the cost of mallory metal. It's the labor involved and the cost of the balancing equipment. The end result outweighs the cost.

CornedBeef4.6L · Oct 30, 2009

Bryant said: ↑

it seems to me that some people here dont understand what balancing a motor is. its takeing the rods and pistons and weighing them. then grinding them to where they all weigh the same. next they take the crank wich should have an imblance of 50 oz or 28 oz, the balance and flex plate of flywheel both of wich will be made specificly for the imbalance of the crank, and bolt it all togther and put it on a balancing machine. now they have what is called bob weights. these are weights that they bolt onto the rod journals of the crank. the weights are adjusted to the weight of the rod, wrist pin, piston, and ring combination. now the machine spins the assembly and detects how much out of balance it is. it will tell you where the heavyest point of the imbalance is. now the machinest will either remove weight or add weight to the crank or sometimes the fly wheel/flexplate to achive a nutrual balance. when a motor is internaly balanced the flexplate/flywheel and balancer will have 0 imblance built into them. all the balancing is done on the crank and is usually pretty expensive because it requires use of malory metal wich is very heavy and expencive.
Click to expand...

Good info and I assure you I aint one of those that needed the education

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Confusing imbalance issue

maverickdragger GearHead

baddad457 Member

CornedBeef4.6L no longer here

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