Boom Baby!!!

[TomsSVX]

Well this is the remains of the big boom...Cyl #5 like many of us expected









Nice huh?? I didn't pull the even number pistons yet but I did pull one through 5

Tom

[SVXRide]

Ouch! How did the cylinder wall look? Weird that only one cylinder went that severely. Makes me start to wonder if there isn't an issue with the fuel distribution on the EG33...
-Bill

[TomsSVX]

the shortest distance to travel for air is the rear cylinders i believe... I understood it before but not so much now Anyway... The block went completely unscathed to the naked eye So this means this block will be sleeved and built

Tom

[NikFu S.]

Slight blur + I'm not a piston guy = what am I looking at exactly?

Little pieces of the piston broke of or disintegrated?

Is that a piston ring?

[longassname]

doesn't look like it was hot...looks like ring failure maybe?

[Trevor]

Do I see a broken middle land? Did anything pick up/sieze even slightly in the bore?

You are being sort of nasty presenting puzzles, while not showing all the evidence. Quiz SVX

[TomsSVX]

After looking closer at the odd pistons I realized #3 had cracked as well and once I removed the rings... all the pieces fell right out. Then I pulled the even pistons where I found #2 and #4 had also gone the route of the dodo... Killed 4 pistons and the motor still ran Only the #5 was the one that showed it in plain view... the others I hade to remove the rings to get the pieces out... All middle ground breaks... all on the top/bottom of the piston(if the motor is sitting as it does in the car). After looking at the bottom side of the piston I can see why. It seems there is very little material there to hold it all together and these are by far the weakest points in the piston.

Tom

[SVXRide]

Originally Posted by TomsSVX

After looking closer at the odd pistons I realized #3 had cracked as well and once I removed the rings... all the pieces fell right out. Then I pulled the even pistons where I found #2 and #4 had also gone the route of the dodo... Killed 4 pistons and the motor still ran Only the #5 was the one that showed it in plain view... the others I hade to remove the rings to get the pieces out... All middle ground breaks... all on the top/bottom of the piston(if the motor is sitting as it does in the car). After looking at the bottom side of the piston I can see why. It seems there is very little material there to hold it all together and these are by far the weakest points in the piston.

Tom

Ah, destructive testing at its very best
-Bill

[Trevor]

Originally Posted by SVXRide

Ah, destructive testing at its very best
-Bill

Exactly, but something must be learned from the losses involved.

In this instance a small cross section of material with very little mass has broken away. This could indicate multi stresses of short duration and therefore possibly detonation. Are there any other signs of such?

[TomsSVX]

I had a bunch of audible knock with this motor... WE were trying new software to try and get rid of it when I blew it up

Tom

[Trevor]

Originally Posted by TomsSVX

I had a bunch of audible knock with this motor... WE were trying new software to try and get rid of it when I blew it up

Tom

Well then, you and WE, have gleaned some useful information. Even if something along the same lines had been expected.

Is WE contributing $ LOL

[TomsSVX]

Mike, I am having a hard time finding a source for Eagle Sti rods... they only have ej20t rods...

Tom

[longassname]

I believe the 1.8, 2.0, 2.2 rods are the right rods

Originally Posted by TomsSVX

Mike, I am having a hard time finding a source for Eagle Sti rods... they only have ej20t rods...

Tom

[oab_au]

Tom are going to pull the rods? It would be worth seeing what the upper half of the big end shell looks like. It will show how heavy the detonation was, before the rings and lands gave away.

It would be good to see how much detonation the pistons can stand.

Harvey.

[SVXRide]

24.5 grams lighter than stock EG33 rods...how much lighter are the Eagle rods?

-Bill