a4ls2goat

People claim you cant use a dished 5.3 piston on gen 4 rods, and theirs a few that actually came like that from the factory. Hmmm.

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iTrader: (1)

My 5.3 is a 2005 and it came with dished pistons with floating pins on the fatter rods. Maybe mid year build, who knows.

dirtylark71

iTrader: (2)

Be a trailblazer! Lol so safe to say no track on saturday? I don't have any extra **** or I'd hook it up man!

a4ls2goat

so i can use the pistons that came off the bent rods and use the gen 4 rods with the floating pins on them?
im gonna have to try it tonight.

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iTrader: (1)

First off, the pistons would have to have the receiver groove to accept the wrist pin snap ring. Typically, pressed pin pistons don't have the groove. Secondly, sneak inside and use you a food scale to weigh the gen 3 and gen 4 pistons. If they're close and have the groove, no problem. Why not just use the ones on the gen 4 rods?

a4ls2goat

because the ones on the gen 4 rods are of a ls2.

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iTrader: (1)

Yah, piston to wall might be a little too tight! LOL

a4ls2goat

lol.

seems like noone has 5.3 floating pistons!!!

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iTrader: (1)

Look for a short block. That way you'd have a Spare crank and block.

Forcefed86

iTrader: (4)

Think I paid something silly like $35 for one. The last 4.8 I built had 1 damaged rod/piston.

Yup was this one. Floating pin, flat top. Same for 4.8 and 5.3

http://www.ebay.com/itm/GM-OEM-Engin...xW4bpR&vxp=mtr

Basically more expensive than the hyper speed pros that look beefier.

a4ls2goat

just placed an order on the speedpro flat tops pistons.
lets see how they work out!

should bring compression up to 10:1?

Forcefed86

iTrader: (4)

They should, always wanted to see those would do! Going to use your old rings and the piston pins and retaining rings from the gen4 pistons?

a4ls2goat

yea, rings from the 5.3 pistons and pins from the gen 4s and the new pistons will come with new retaining rings.

a4ls2goat

a4ls2goat

Tjabo

Those noodled up rods kill me!

Did you weigh the respective piston and rod combos to see if/how your bob weights changed? (just for the fun of it that is, I don't expect you're going to go back and have the crank balance changed if this truly is sloppy mechanics style)

a4ls2goat

a4ls2goat

Ready to slam the motor in tomorrow and do some tuning.

Tjabo

Awesome, fast work!!

DirtyS30

Awesome cant wait to see it go.