1999Firehawkls7

iTrader: (3)

I've got ls2 Pistons and rods out of an 06 Gto.
If I slap those in a early 2000s 6.0 Iron Block n Crank would I need to rebalance?

MY_2K_Z

iTrader: (1)

Technically yes but many have done it without. Balancing around here runs 2-300 so me I would do the balancing.

lsxdick

iTrader: (4)

Nope you shouldnt have to

pantera_efi

iTrader: (1)

The best "tech" would be for you to weigh the rod/piston/pin/rings from each engine assembly.

You could "bribe" a USPS clerk, let them use their scale.
My guess is that could be possible, they are very kind.
They are required to to "quote" shipping charges.

You could visit a "dispensary", I am sure they have a Gram Scale.

The "new" weight can be lower, not heavier.

Lance

KCS

iTrader: (20)

It would be smart to have the crank balanced. The LS2 rod and piston assembly is considerably heavier.

Gen III LQ4 Piston, Pin, & Rings @ 649g:


Gen III Rod @ 609g:


Gen IV LS2 Piston, Pin, C-Clips, & Rings @ 665g:


Gen IV Rod @ 642g:


When you calculate the bobweight, the difference is almost 60g. Normally a crank is balanced within +/- 2g from a target bobweight.

Aaron at SDPC

Spend the money and have it balanced.