ChevyChad

iTrader: (50)

hmm... That makes sense. I'm probably wrong.

LASTLS1

iTrader: (7)

Is it me or does that pison look like it was detonating BAD!

Shawn @ VA Speed

iTrader: (3)

not really. looks like pieces of the cyl wall peened the top of the piston. Doesn't really matter. The engine wasn't designed for boost. Anybody with any sense isn't going to build a boosted lsx with a 4.185 bore.

if GM has any sense-which I'm sure they do, they probably inspect all the blocks first-then they decide which one will work for n/a and which one will work for boost. they then take the ones with more core shift and use them for the n/a engines. That's what i do. If i built and engine for n/a and someone put boost on it-it's on them. An engine designed for one thing isn't optimal for another-plain and simple. If might work for a while, but it ain't right.

nodrok

Why is this a problem with the lsx block, and not the rest of our lq/ls blocks? or is it?

Jontall

If quality control is that bad, then there's no reason to buy a LSX block.

Beaflag VonRathburg

iTrader: (176)

That thread is amusing. I don't know where your thought process would have to wander off to think that putting together some massive money pit like that with mismatched components would be a great idea.

got-a-ls1

iTrader: (12)

what is the need for a 454ci when your boosting... big ego killed that motor plain and simple... still im kinda surprised it broke that quickly on the dyno.... or this is a tuning issue that just isnt coming out of their camp.... its likely they arnt disclosing everything.

I know the LSX is rated for 2500 hp at which bore thickness is this rating? just curious, obviously not 4.185 thats a bit much for 4.4 inch bore spacing.

topend

Im surprised looking at the picture that the cylinder wall thickness is that thin at 4.185. You would thought that for an LSX block which weighs nearly as much as a Dart big m block ,would have plenty my metal in the cylinder walls. Even the Little m block has .245" minimum wall thickness at 4.185.

NemeSS

iTrader: (127)

it had alot going against it from the get go.
ignorant or misinformed owner, very high scr for forced induction, thinner cylinder walls, and not mention poor and wrong calibration. it looks like detonation also played a role in its destruction.
sayonara:boom:

LASTLS1

iTrader: (7)

I was refering to the black peppering in the center of the piston. If the motor was only running for minutes it looked like the piston was getting eaten up pretty quick? I would hate to be in his shoes either way.

SincalT/A

iTrader: (16)

Damn,It was really hard to make it through the camaro 5 thread.I wanted to sign up and point out a few things but, some how I dont think it would've done any good.I mean really...What the hell is wrong with you guys over there?Whole lotta bickerin and not too much common sense goin on.
Im really sorry to hear of your misfortune.Imo. long as cylinder pressures were kept under control.It should not have fractured in that manner but,thats a moot point right now.Chances are the piston rattled or at some point cylinder pressure got out of control.Tell me the shop that dynoed this engine or you have a tuning log of this incident???If not then that raises a few ????'s

AES Racing

iTrader: (6)

I sonic checked an LSX block here at 4.155" showed .225" 360º around the bore. (1st gen LSX block)

but 454 with a blower, hope it was a F2, or 4L whipple, something like that on it?

stevieturbo

Sums it up really. There are always idiots out there who want to blame everyone else but themselves, for their own stupidity.

And there is rarely ever any warranty of motorsport products for the above reasons !

SSZ

This sucks for that guy for sure. Ok, dont want to read the whole thing over there but my understanding is they took a 454 crate motor out of the catalog i guess??? If this is the case that shop should have probably said to the customer "this is really risky and we are not going to be responsible" or just said plain no. You never know, it could have been one of those "lets try it" scenarios and when it really did go boom they cried and blamed GM. Sucks for sure but i think the shop should have maybe backed away from the idea. Mind you, if they truly did have that Meyer guy in there in the first place, the shop may have had him there because they didnt believe it would work in the first place. Customer may have been pushing for them to do it. If i owned the shop i would have probably backed away from the idea.

2001WS6Vert

I suspect detonation as the root cause. If the engine was built within the recommended guidelines it may have withstood the force. The weakest link breaks first.

Slowhawk

iTrader: (12)

I'm pretty sure he had a small Vortech on the car. Would also suspect they are running the wrong Cam which probly shot a high DCR.

SSZ

You think a small vortech would push it to 1200 crank? I would think Ysi. Small one i wouldnt think so but i could be wrong.

laughatrice

iTrader: (12)

"$10,000 crate motor" he could have made a down payment with a reputable engine builder.

beavis

iTrader: (15)

Would this be enough cylinder wall for 1k rwhp? I just had my 427 rebuilt using a LSX block (4.125") for my twin turbo TTI setup, should be broken in and tuned in the near future. I hope that I choose a bore that will not make the walls to thin. I'm only going to push 15lbs through it, should put me between 800 and 900 rwhp.

kmracer

iTrader: (1)

the owner of the car and the shop building it both are clueless.