I am pretty sure it was to much n20. I never saw knock once on my tune, however my iat2's were through the roof once on a trip to california when my ic pump froze up which could have done some minor damage. Either way it's getting built =D. I can't wait tell mines done.

Death - let us know how that cometic gasket is holding up, the gm build book stated the stock head gasket, which is a MLS gasket, is good for 300+ horsepower. I have also been told by other people that the stock head gasket is the way to go on the lsj. I don't know though. I still haven't ordered my head gasket yet, trying to decide still.

 

Hmmm, how funny. You did just dyno a jbp header with your tvs setup too, and experienced problems. I wonder if that says anything.

 

I've heard lots of good things about the stock head gasket, and from more than one person. I know of a guy that has a cavy with 485 to the wheels, and he uses a stock gasket. Once I see the cometic, I'll make my decision.

 

well, the motor is completely fucked. not just the sleeve, but the cylinder wall is cracked. both have three cracks in them. so, the motor has to be replaced and ilm looking into options now. i already have one lined up.

 

Ouch.

 

ouch im sorry to hear this...

 

ouch indeed... any questions on the build shoot em my way... I'v got over 20k miles at 20+psi on my build

 

I just got back from Joe's house where we took the head off and saw the destruction. Cylinder 2 had three cracks in the sleeve, whick also pushed through the cylinder wall. I know the engine went through a lot, and I'm pretty surprised that it lasted so long. I will be starting the rebuild next month, so I am getting a list of parts together that I will be putting into the new motor. I never knew that they costed that much...

I've got some questions, and the psi that I will be running will be well over 20 psi. So I'll get to you on that.

 

so how was the cosmetic head gasket?

 

perfectly fine, actually. I think the problem just got worse and wasn't caught the first time my block had an issue. there wasn't any damage done to the sleeves the first time I rebuilt the block, but just weakened over time from the level of boost I was asking it to hold. Half of my coolant was found throught the block and intake manifold.

 

Sleeve's do not give to boost in most case's.

Extreme detonation is my guess.

 

maybe since ur down for rebuild maybe u can test out the ottp cams in the making, so the others can have them asap :]

 

Exactly, im gonna have to say this was caused by knock at a fairly high rpm... this would be engine number 4 that i have seen blow with a tvs and a hint of knock, it took out the cyl wall which leads me to believe that there was serious knock/detonation in order to create enough cyl pressure to blow out a sleeve.

you didnt happen to be logging when it happened?


I always run my interceptor with the annunciator turned to monitor knock which will trigger the shift light cluing me to let up... this has saved me more times than i can count on one hand. well and a egt of coarse

 

well, there are two things that could be the cause of this, but they both stem from the same thing. when I left for deployment last year, and I had to put new pistons in the engine, it was because of the detrimental knock of the jbp header that caused it to **** on itself. The other time, it was during the testing of the headers, when I put it back on, which was probably a mistake, again it was causing extreme amounts of kr. Mind you the first time I had to go into the block, piston 1 and 2 were destroyed. I still have no. 2 in my room as a reminder. The tuning that was done on my car was kr free. Everytime the car was tuned, he showed me what was going on, so I know for myself. It had nothing to do with the tuning.



I think I have a good relationship with ottp. I would be honored to test one of their upcoming products. The car will most likely be done before thanksgiving. Once again, the money isn't the issue, I just have to wait until October before I can start ordering things.

 

do it!! i want cams to go with a ported head asap

 

Were the sleeve's honed during the install of the piston's?

Diamonds or stock?

Compression if diamonds?

 

The only time I've had more than two degrees of knock at high rpm was when I was testing the jbp header on my car. That's why I know it doesn't flow like some people believe. It weakened my cylinder sleeve the first time, and took it's toll the second time I put it on. the destruction of the cylinder wall didn't happen while I was logging, I wasn't even over 5 psi. I was going 40 mph when it finally gave up and let go. Plus I had a bangin chick in the car at the time.

I have two interceptors that I use to monitor knock from time to time. there was none. So like I said before, it wasn't tune related. The cylinder sleeve and eventually the wall gave to the cylinder pressures it was introduced to.

stock: 9.5:1

 

Hmmm, just as I thought. JBP strikes again. I bet it was the amount of air the header was restricting. So, let's see how this should be started...

Diamond pistons,
Darton sleeves,
cams,
total seal piston rings,
Eagle h-beam rods,
supertech valve springs,
inconel sodium filled valves,
new ARP head studs,
return style fuel system,
etc, etc, etc.

Just my opinion of where to start. Or, go with ZZP's short block that is in testing. I think it's 2.3 ltr displacement. Might wanna hit them up for some info. Also, I know of a good machine shop not far from Joe's. It's on Effingham and High St.

You know I'm gonna follow this closely because I want to build my engine.

 

For one, I won't have to upgrade the valvetrain at all. All of that has already been done. I don't think that the diamond pistons have been damaged, but that remains to be seen. I will upgrade those if necessary though. The rods can handle the abuse that I will require of them. Head studs, yes. And I already have a return-style fuel system, but didn't run into the need to use it before this happened. I'm not as bad off as it might seem..., well besides me not having a car to drive.lol

 

List revised...

New block,
Darton sleeves,
new ARP head studs,
etc, etc, etc.

 

oh, i wasn't even really thinking about that but your probably right, the cyl was probably weakened over time with the previous incidents



ARP head studs are re-usable, head bolts are not.

believe it or not, the cometic head gasket is too... but that's up to the OP on that one, for the price and the pain of tearing it back down, i would get a new one.

 

yeah. It was just waiting for the right reason to take a dump.

I have to be deliberate when figuring this one out. It will be stronger, and I will meet my goal this time.

 

Damn that sucks man. I hope the rebuild goes well though. You will have a PM to check in a moment as well.

 

responded.

darton sleeves are going into the block. I was misinformed about what was involved. New pistons, some gaskets, and other miscellaneous stuff. The head is still unharmed, and will be portmatched on both sides. Intake manifold (ported) on one, clear image header on the other. Killer chiller will be added as well.

There are goals that still have to be met.

 

cams?