i never have smelled or seen any coolant never had to add any either but i could be wrong maybe it did lift a head i kinda seem to find it hard to believe but anything is possible

 

I get it... Who is in this position... We are. You seem to conveniently forget that the meth dodnt turn on. That's what caused this failure. How can that continue to be overlooked? Without the meth 'failure' there is no engine failure. Period.

The chvnge in AFR track vs street is not a magical change because it happens to be one place bs another. It's a different tune. A programmed change. Prior to that he was losing fuel pressure and running lean. Again not because of bend rods with less compression and less efficient combustion, he was simply out of pump. I ran the numbers a few times and inwas surprised or didn't show up sooner than it did.

And his compression is lower than 11.0.not by much but it is lower. That's what LS2 compression is with stock 243's and flat tops. His heads heads have not been milled enough to remove as much space as the LQ4 dish creates. My math put it at 10.7 to 10.8 but I was never 100% on the size of the chambers.

It is high timing, but keep in mind that boost was only at very high rpm where cyl pressure is slightly less of a concern. He saw the same timing at 5000 rpm and only 10psi which is completely reasonable.

 

Ok meth failed....but that piston doesnt show lean

And lean will not bend that rod

You can sit here and type till fingers are bloody

Heres what you have on your hands.....destroyed piston, steam cleaned pistons, bent rods

Damage was done prior to street pull

Didnt the truck make passes after the mid 10 pass where he fought traction and peddled it

 

Whatever is the reason for failure just make sure you learn from this so doesnt happen again

 

So thats what I am asking. How long does it appear that water had been getting into the cylinders? If its a long time wouldnt there be signs of that? Smells, water where it shouldnt be, low coolant? We have never had any of those issues.

There was never a track pass that involved pedaling it, but that's a daily occurrence on the street, yes. Guy loves burn outs Just look at his sig

The meth failure is more than lean. I'm not pointing purely at lean. It must have had horrible detonation. Let's throw lean out the window. We're now talking 17* timing on straight 93 with over 10.6+ compression and an untouched stock bottom end. Thats horribly inappropriate, and ball game over. He knew as we were dialing this in that meth was a key to the truck running right. It's a risk we were both willing to take. I have mine set up the same way. Not that its my "kill tune", but I have meth and I tune for it. We both rarely go to the track, so to only take advantage of meth once or twice a year seems foolish to me. It's almost as though we had the truck tuned to run on 100 octane fuel, but on a whim the driver decided to fill it with 93. Bad things are gonna happen... If you think it pushed water and that's is what ultimately caused this failure, which I don't disagree with, I'd be willing to bet it all happened on this last run. Detonation lifted the head while likely bending the rod and the rest is history. It's a very low mileage motor, so I wouldn't think it took very long to clean up the piston tops.

Again I ask about the strength of the rods vs lifting a head. Everything I had heard pointed to the likelihood of bending a rod prior to lifting a head on the earlier motors. Is that not the case? The possibility of bending stock rods when you are aiming at making enough power to run a low 10 with a procharger in a 4500# truck seems real to me. He knew the motor was very near its max. I have heard of examples of bent rods with stock head bolts in the earlier LS.

Kurt check your block for signs of water running down it while hot.

 

132mph is around 750rwhp and where weak rod motors fail, now 4.8s do go past that mark

As for detonation you would see signs of it on the heads, the pistons and in some cases if bad enough will push freeze plugs out of heads

Peddling it is very bad especially with meth...you tear up more **** then enough peddling it..the unloaded vs loaded of peddling will eat up a trans, bust rear ends and cause things like hobb switches and meth controllers not tk react fast enough

I peddled my ls2 and meth didnt react and lifted heads...ive since learned if ya spin bad enough pass is aborted


Ive saw 20k mile motors not that clean after running meth

Hell my ls2 with 1500miles of e85/meth showed carbon and this was with pistons being clean

Now if saying he had water/meth that makes sense but some cases report rust in cylinders

 

OK.

This motor has less than 15-20k for sure, and less than 4k since the blower where heads were removed and pistons were cleaned. He's also had a catch can vented to atmosphere since this was done, so there have been no oil vapors to add to carbon build up

Every indication is that all the pistons look the same. I will wait to hear from kurt on this one... but IMO it makes pushing water on the reg less likely. I still firmly believe we never had that issue pre the big bang

We were on the cusp, and likely beyond, the threshold these rods can handle and suddenly we lose both the cooling and detonation resistance benefits of the methanol. Detonation and carnage ensue.

 

The methanol is used to quench the compressed air to a lower temperature and keep combustion chamber temperatures in check. Without the meth, each combustion cycle would be progressively hotter until it reaches a point at which it self ignites before the spark event. If it self ignites many degrees before the spark event and the flame speed is faster due to the higher heat, the cylinder pressure before the piston reaches TDC is what I believe would bend these rods.
WTF are you cowboys doing making pulls in January on cold streets in New England?

 

Welcome to Boston

 

If you could keep strategically dropping that line throughout this forum where it fits that would make my year. Keep it up.