Custom cut pistons & slightly modified crank

custom8726

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Feb 25, 2008
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BrokecrankLLY4.jpg


BrokecrankLLY.jpg


BrokecrankLLY5.jpg


BrokecrankLLY11.jpg


BrokecrankLLY10.jpg


BrokecrankLLY10.jpg
 

x MadMAX DIESEL

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Dec 30, 2008
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Thats not good, at first site I thought those pistons were machined like that and thought hmm thats an interesting cut. Then I said ohh Shit! Was that your engine? I thought you only had that engine running for a bit. Its crazy to see that kind of damage in a short time. What kind of timing and shot were you running and egts?
 

TheBac

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Apr 19, 2008
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Boy, when you blow a motor, you dont mess around. Sorry to see it but glad you can salvage something from it.

Found the post in your BOOM thread about the possible hows and whys.
 
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custom8726

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Feb 25, 2008
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Boy, when you blow a motor, you dont mess around. Sorry to see it but glad you can salvage something from it.

Found the post in your BOOM thread about the possible hows and whys.

Yes, I was not easy on it thats for sure :eek: It did surprise me when I pulled the heads today though, I expected the pistons to be salvagable after only 8k miles. Kinda makes me wonder why the all melted the way they did, I am sure the High EGT's did not help but before the build My original engine seen higher EGT's on a more regular basis. It's pretty amazing with that much erosion/melted piston none of them cracked.
 

TheBac

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Yeah, but what % injectors were they, and what timing and pulsewidth? You were definitely throwing some fuel around.

Were you running nitrous? Again, sorry to see it.
 

custom8726

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Damn that sucks what was done to the pistons were they new or reused cut and coated ?

Reused LLY pistons De-lipped, NO coating... I really doubt coating would have helped any in this situation.. Definetly trying something different on this next one, Arias maybe :confused:
 

custom8726

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Feb 25, 2008
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Yeah, but what % injectors were they, and what timing and pulsewidth? You were definitely throwing some fuel around.

Were you running nitrous? Again, sorry to see it.

No nitrous, only 40% Injectors and dual LLY CP3's... I do not tune my truck so I dont know the timing and pulswidth, but knowing my tuner's track record for conservative tunes and keeping motors together I doubt that had anything to do with it. I think I probably did most of the damage in one night at a local pull were I pulled 3 times back to back and pretty much melted my up-pipe bellow's and caught the truck on fire :eek::booboo: