sillz

Ok here is the story i bought a turbod 2000 z28 with a 6.0 motor. When purchase was being made was told heads were worked and bottom end built. After a few weeks had valve warp and decided to go with afr 205 heads. Upon tear down pistons look stock. So the question is is there a company that makes forged pistons that look like a stock 6.0 piston. Any help would be greatly appreciated. As you can probably tell i am just getting into the whole gear head thing and have been bitten hard. 1000 hp here i come

shtnfrds

iTrader: (1)

do they look dirty, as in coated in carbon? if so id bet they are stock and you were "worked over"

sillz

Yeah they were dirty and i was probably worked over a lil but so were the 3 before me who bought the car. But what has me questioning it is that the car has made 974 horse on a mustang dyno and 1038 tq with the new afr 205 heads and 88mm turbo and 95lb injectors. It just amazes me if the stock bottom end could hold that from what i hear people say they can hold.

shtnfrds

iTrader: (1)

do you know what 6.0 it was? what vehicle is it out of? truck, gto, or vette? The trucks had two different 6.0's, the lq4 which was the one in the siverado ss's and escalades, and the lq9, like in the 200hd's. well i think thats how it is, might be other way around. id see what vehicle it was out of first.

sillz

It came out of a 2001 z71 the old heads were l99's if that helps

shtnfrds

iTrader: (1)

try going to fullsizechevy.com

ask them if the motor was forged or not. almost always someone on that would know right off the top of their head.

sillz

Appreciate it will try anything i can thanks for the advice.

s346k

iTrader: (4)

are the pistons flat-top or not? the stock lq4 pistons have what looks like a cross on them and are ultimately dished 6.5-6.7cc. lq9s and ls2s are flat. the lq series of engines do not have forged pistons. only a couple lsx engines i know of came with forged pistons - the ls9 and maybe that factory boosted caddy motor?

sillz

The pistons are flat in the center with a ridge running around the outside.