chriswtx

iTrader: (5)

No damage to the heads. But cracked block and 2 broken pistons. No signs of detonation and fuel mix was 10.7:1. Looks like a stress riser from the factory drilled dot to mark forward caused the failure. #5 was broken and #7 had a crack that was about all the way through. Coolant in #5 cleaned the top of the piston pretty good though. New forged 346ci is on the way...



















Man I'm dirty...

Jake@EPP

With the amount of power you have listed in your sig, you were on borrowed time with that, its just a bummer it took your block with it.

chriswtx

iTrader: (5)

Yeah, I new that. I already had a new block and all the parts for a new motor just sitting and waiting... It lasted a year though. Ever since I installed the blower, I've been gathering parts here and there when good deals came up for sale. Comming back bigger and better..

Motor details
346ci, Eagle LS1 6.125" rods, Diamond -8.6 dish pistons, stock crank, new LS6 block, ARP head bolts, custom ground Comp Cam 226/232 116LSA, Texas speed CNC LS6 stage 2.5 heads 2.04intake 1.575 exhaust valves, Will put me right at 9.5:1 compression...

My "to do list"


Pull old motor.
Build and install new motor. forged 346ci.
Port match new heads to intake.
Install new aluminum flywheel and Textrillia clutch.
Install bell housing blanket...
Install DTE tranny brace and left hardened output shaft.
Install hurst shifter.
Install Wolfe 6pt cage
Install Meth inj. system.
Install smaller pulley on blower..
Install line lock..
Install new stainless brake lines..
Relocate Bosch fuel pump.
Install Bilstein sport shocks.


Just a small list. I have a week off for christmas and I plan to have it up and running by then...

Pro Stock John

iTrader: (34)

Looks like fun, I think stock pistons are good to 600-650rwhp and then all bets are off.

96silverram

iTrader: (12)

Their is something very disturbing about seeing that NOVI on the front end of your vette with the hood off.

SSilverSSurfer

iTrader: (8)

damn thats dirty, and that NOVI looks mean under the hood

motorbuilt

iTrader: (17)

man, you guys ripped that thing into a billion pieces now didnt you

Mike 01WS6

Novi 2000 is a big freakin blower. lol You should have plenty of fun with that on a forged block.

kp

iTrader: (34)

Same thing happened to me, broke that same little chunk of the piston off and cracked the block plus bent the connecting rod also - aluminum doesnt compress very well All it takes is a tiny bit of detonation at those power levels to bust the piston and there is a point even with no detonation they will just fail - I'm sure you were getting close to that point.

chriswtx

iTrader: (5)

Yeah, I was thinking the same thing. It's going to be lots of fun to put back together...

cablebandit

iTrader: (37)

remember also that stock rings are gapped a lot tighter too...coulda been ring butt. if that is your first one congrats on joining the HUGE club.....me and Mightymouse are the founding members i think

Pro Stock John

iTrader: (34)

I think it's from the stock rings butting up. Every time a motor dies like that, it's the same crescent shaped piece of the piston top.

chriswtx

iTrader: (5)

I've thought about that from day one of adding the blower. I have always been real careful not to run the car hard for more than 1/4 mile, always given it at least 30min cool down between runs, kept the mixture rich 10.7:1, timing low 14degs. On the street I never get on it more than a couple of gears for just a few seconds no more than 10sec for sure. And never back to back runs on the street. I think this was just a case of the stock cast pistons combustion chamber pressure limits...Too much power... I think its just stress riser from the factory drilled dot to mark forward caused the failure. Its a very thin point in the piston at the ring land ...

Got Me SOM

iTrader: (2)

should make some nice power when put back together. how long did it take to rip apart in your garage?

BrandonDrecksage

iTrader: (1)

you guys look really happy for pulling a blown engine...lol.

chriswtx

iTrader: (5)

it took me about 10-11 hours so far. I could have just pulled the motor in about 4.5 hours, but I went ahead and pulled the rear end/rear suspension so I can add a hardened output shaft and DTE transmission brace...

I just finished pulling apart the motor. All the rod and main bearings still look like new..