Black01M6SS

iTrader: (3)

Nothing you guys haven't seen before but I figured I would post my results.









The pics are of the dreaded #7 piston. All of the other pistons looked great.

I was surprised to see that the top of the piston wasn't damaged. I've seen pic's of other pistons that supposedly had been in engines with detonation problems and it looked like someone had a go at them with a chisel and a hammer. Was it detonation that caused the ring land failure? If so why was the top of the piston not damaged?

The rings were holding all the pieces together. There doesn't seem to be any damage done to the block. Is there any market for used LS1 blocks? The block, crank, and heads all look great. Any idea what they would sell for? I was planning on rebuilding the engine but I've decided to go back to college so I could really use the money. I already have a new 402 in the car.

Coonass350

iTrader: (19)

pics of the 402!!

Cchris1109

iTrader: (11)

an experienced reputable tuner would have made it last :'(

Urban Legend

iTrader: (5)

Thats too bad.

CamaroSS19

iTrader: (24)

Thats what happend when you reach the limits of the stock shortblock stop blaming the tunner

02NBMFormula

iTrader: (6)

welcome to the dead piston club!

shouldnt there be a black coating on the sides of the stock piston??? or did they do that for different years?

ZDOG

iTrader: (13)

lol! thats excactly what my # 7 looked like.

landonew

sucks man. I would think that the F/S section could net you some $$$ but not a whole lot. Might cover a semester or twos worth of books.

Black01M6SS

iTrader: (3)

11psi with a cam and full exhaust probably was pushing the limit of the stock shortblock. That is why I asked if it was detonation that caused the ring land failure.

I'm the one that tuned it so I haven't been blaming anyone else for it

Whistler

iTrader: (46)

04 LS1 and 02+ LS6 got the piston skirt coating

less10

Broken ringlands usually result in too much fuel, or just simply making too much power.

02NBMFormula

iTrader: (6)

are you 100% on that? this is the piston i pulled out of my 02 formula

the black stuff is the coating your talking about right???

Rickys S/C Z28

iTrader: (13)

pm me on what you want for the block

jeffboy757

iTrader: (14)

heres what happens in 7 psi NON intercooled with a crappy tune

CamaroSS19

iTrader: (24)

Its not your tune .Stock stuff just brakes form the extrem forces that were put on the piston

STAR

iTrader: (1)

I'm curious as to why too much fuel would cause broken ringlands? I was under the impression that either detonation or running lean would cause that kind of damage. Too much fuel would would run rich and cool the intake charge and is what most recommend when tuning. Am I missing something here?

geeteego

iTrader: (1)

Excessive cylinder pressures + heat + lean mix + detonation = bye bye #7.

It's the Perfect Storm of engine disaster. At least you didn't crack the block.

blacksi

iTrader: (3)

Why is it #7? I bumped a little lean the other day and sure enough melted the 7 spark plug. I have an 8 AN feeding in to the #7 first I thought this would get rid of this issue but it didn't.

I've thought about flow mapping some injectors and putting a slightly larger one in that hole.

lt170chevelle

iTrader: (2)

cant you just fine tune your individual cylinder fuel table? or is there not one in the ls1 tuning programs?

Black01M6SS

iTrader: (3)

There is no way to do that with the stock computer and the tuning programs we have for these cars.