CrankShaft - Equilibrate

[Thuppu]

Can someone give a explanation how to balance a I5 crank correctly, and why does it need to be so complicated? If you need to balance the crank in one limp with the flywheel and damper, what then if you need to change one or both of them, total engine dismount?

[Error404]

many people run with other/lighter rods and pistons without to balance the assembly. Some say one need to balance them when going with higher than stock RPM.

IMHO you'd have to very lazy and/or very stupid no to
If you change the mass of any of the reciprocating components you should have it balanced.

[Nuno Cristiano]

Can you give me some company that make it?

[quattrofrank]

On an inline 5 you need to balance the whole assembly in one go. It doesent help to balance the parts separatly

[Billman]

many people run with other/lighter rods and pistons without to balance the assembly. Some say one need to balance them when going with higher than stock RPM.

[Nuno Cristiano]

Understand!

Thank you by all!

Regards,

Cristiano

[Error404]

you can't buy a crank balanced for your spec, you need to find someone who knows how to balance the 5 cylinder engine

[Nuno Cristiano]

Yes, balance.

Where i can buy it or i will need manufactured this part?

[Error404]

i think he means balance. your new rods and pistons will not weight the same as your original ones so you need to get the whole assembly balanced.

[Nuno Cristiano]

I´m a bit confused. Today went to my mechanic to give pistons, rods, bearings, rings that came last week.

He speak that my crankshaft ( 7A engine ) is not calibrated to my new pistons ( JE ) and forjed rods. He said that equilibrations is made into Pistons + Rods and crankshaft.

Normaly engines inline of 4 and 6 cyl have crankshaft equilibrate. Right?

So, my question is necessary recalibrate my crankshaft to my new setup of pistons + rods?

Regards,

Cristiano