Running the motor lean hurt it?

Jim Fulmer said:
If you run a diesel lean on the bottle you will see some plasma torch EGT's......like 2K!
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I torched the center section out of a couple devided entry top turbo turbin housings because of this early in my bottle days.
 
The current theory is one cant run a Diesel too lean. UPS can break a ball bearing wrapped in 1000 layers of bubble wrap though, so anything is possible given the right conditions.

Stoich 'enough' of a mixture in a Diesel is a wide one. very wide.
 
sorry i didn't know that N2O was a factor here... you boys have fun with that... 18-20:1 is the best mixture for a diesel.. IMO let banks run their engines too lean, let them melt pistons... learn from their mistakes....
 
Powerstroke Racer said:
and you know this with 100% certainty?
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How did I know that this topic would get the wizzer to post.:hehe:
Your claim to fame is a failed fuel pump and the lack of any diesel getting into the cylinder. I have already proven that ridiculous theory of yours wrong.:bangLOL
 
Big Swole said:
Drugs not included!!!!


"Drugs er Bad!! Don't do drugs"
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Gotcha, ya I agree that it would not be a problem with turbos only, BUT

MADDOG said:
How did I know that this topic would get the wizzer to post.:hehe:
Your claim to fame is a failed fuel pump and the lack of any diesel getting into the cylinder. I have already proven that ridiculous theory of yours wrong.:bangLOL
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Until someone can explain with certainty what caused the damage in those pics I'll stick with the lean theory.
 
Powerstroke Racer said:
:hehe:

:rockwoot::bow:

*nx*:doh:

:doh::doh::doh: proper use of the:owned: myself here:what:


Me example of running a diesel too lean.
Snow wjite carnage II
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that doesn't look too lean to me... it looks the block cracked/ or the head gasket failed from the immense cylinder pressures and the cylinder took a nice fill of coolant! Hydraulic lock will surely split a CAST piston and spread/ crack a block like that.. I've seen it happen on sh*t it shouldn't happen to....
 
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XTrEmE9156 said:
that doesnt look too lean to me... it looks like the pistons failed first and took the block with it..
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Did you look at the pics really well?
The block is spit in 2 side to side, the middle 4 pistons are split along the wristpin, the water jackets on those 4 cylinders are caved outward, The heads where the studs went though are broken outward.
 
Powerstroke Racer said:
Gotcha, ya I agree that it would not be a problem with turbos only, BUT



Until someone can explain with certainty what caused the damage in those pics I'll stick with the lean theory.
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With "Certainty" that engine failed because it was built and tuned by the Powerstroke Wizard, and to hide his shame he wants to blame a poor little electric fuel pump that didn't want to supply any fuel to a coolant pissing, oil leaking excuse for a 7.3 powerstroke.:kick:LOL
 
Powerstroke Racer said:
Gotcha, ya I agree that it would not be a problem with turbos only
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Yeah, that's all I was referring too and what Jeff G. taught me...I was always thinking like a gasser trash guy until about 2+ years ago....lol

Jeff's just tells me to Stay the F**k away from any injectables/sprays other than good ol' #2.......My thin A$$ wallet just can't take it!!! LOL.....Hell, it's highly stressed with #2 only!!!! =)
 
I'll elaborate. I don't think it's possible with just #2 and a lethargic Cummins head. I do think it's possible with nitrous and anything. Like Jim & Paul mentioned, get a metal hot enough and add oxygen; bad things happen. I also think that's why the LB7 guys had trouble with cracking pistons, but I can't prove that either way so it's pure speculation at this point.
 
Powerstroke Racer said:
Did you look at the pics really well?
The block is spit in 2 side to side, the middle 4 pistons are split along the wristpin, the water jackets on those 4 cylinders are caved outward, The heads where the studs went though are broken outward.
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ya i looked at the pics... that's why i edited my post..
 
XTrEmE9156 said:
that doesn't look too lean to me... it looks the block cracked/ or the head gasket failed from the immense cylinder pressures and the cylinder took a nice fill of coolant! Hydraulic lock will surely split a CAST piston and spread/ crack a block like that.. I've seen it happen on sh*t it shouldn't happen to....
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How would you explain the torch marks if water broke the pistons?
all 4 wristpins and cylinders affected had the same burn marks and only the middle 4 broke, the 4 middle cylinders would get the most nitrous on a 7.3 engine.
Blown_motor_Snow_White_II_075.jpg

Blown_motor_Snow_White_II_050.jpg

Blown_motor_Snow_White_II_028.jpg

Blown_motor_Snow_White_II_090.jpg
 
MADDOG said:
With "Certainty" that engine failed because it was built and tuned by the Powerstroke Wizard, and to hide his shame he wants to blame a poor little electric fuel pump that didn't want to supply any fuel to a coolant pissing, oil leaking excuse for a 7.3 powerstroke.:kick:LOL
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Richard I realize that with your trucks not running that you may be bored and looking for some fun, but let's leave that for another thread.
I really would like some answers and seems there are enough broad minded people on here now that maybe we can come up with an explanation.
 
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