Balancing when changing pistons.

[zach44102]

Having Wiseco make me a set of pistons. Using the original crank and KOB rods. Should i balance the rotating assembly with these new pistons or just grab a gram scale and make sure each piston/rod assembly comes within a couple grams?

are people swapping pistons in sho motors with balancing?

 

[kevinspann]

Yes, you should have the rotating assembly balanced.

 

[zach44102]

I just did some research and I think this is something i can do myself with a gram scale. Minus the crank. So now my question is how well are the cranks balanced from the factory? I can weigh each rod and piston myself and take off material as needed.

 

[yamahaSHO]

BALANCE IT! The Wiseco piston will be lighter than stock. Have it balanced properly. Not sure why you're questioning it on such a build...

 

[zach44102]

Ok I will send it all off to get balanced. Thanks for the insight

 

[intimdatr]

From what ive heard it will make a big difference in how smooth the thing will run.

 

[AREA 91]

You would be foolish not to get the rotating assembly balanced.

 

[Irish Pride]

You would be foolish not to get the rotating assembly balanced.

Brian, meet Zach.

 

[zach44102]

After everything I am without a doubt going to get it balanced. Only reason I asked was because I had seen people swap pistons in other applications without a balance.

Should I balance it 50/50 or can there be any benifit of balancing it differently? Also rods?
Should I mess with the rods at all? I have heard of people re sizing them or should I just leave them alone.

 

[AREA 91]

After everything I am without a doubt going to get it balanced. Only reason I asked was because I had seen people swap pistons in other applications without a balance.

Should I balance it 50/50 or can there be any benifit of balancing it differently? Also rods?
Should I mess with the rods at all? I have heard of people re sizing them or should I just leave them alone.

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http://www.enginebuildermag.com/Article/48121/understanding_crankshaft_balancing.aspx