Cast parts have porosity and inclusions....

 

thats cool.... but half the people in this thread are blaming this guys engine going kaput at idle on hyperutectic pistons. its stupid.
out of all the N/A stock shorblock cars hauling ***, i really dont see that many piston failures.

 

Are ya SURE these "stock" short block engines have never been apart?
What is claimed to be stock isn't always out the front door at the factory "stock"
Unless ya were with these "stock" cars every day since it left the factory ya got NO WAY OF KNOWING.

Or perhaps look at "stock eliminator" in NHRA.

 

People are making this one too complicated. I say the piston was simply defective and was the primary component that failed.

Rich

 

well, from direct experience, the fastest bolton LT1... i've driven it on occasion. it has a completely stock engine aside from rockers and a throttlebody. it has 140,000 miles on it.
we launch it around 63-6500, and 6700 or so thru the traps. its made quite a few passes. its good for ~11.70's @115ish.

if im not mistaken, there is a stock shortblock LT1 or 2 in the 9's.

 

Yea we got some in the nines down here and have seen the rods hung out the side,pistons in the pan,ect. When ya get in the nines it's really TOUGH on hyper-u-crap-tic pistons and the PM rods.
When ya said really fast I thought ya meant in the 9's

 

No. That's YOUR misreading.

I'd explain the difference between THAT interpretation and what people are ACTUALLY saying, but hardly anyone is going to give a crap what I say and the rest will misread it anyway; so why bother?

 

 

A cast piston will probably last forever in a lawnmower unless you forget to put oil in it. They're low compression, low rpm, and low cost. But I guess you could always run premium in it if you've milled the head, disabled the governor and advanced the timing so it'll cut grass faster and are worried about it detonating ;-)

 

If ya only knew.

 

That would probably require an SFI approved blade shield to keep your feet attached at the ankles.

 

How about this: why doesn't somebody post up some pics or examples showing how a forged piston can be destroyed in the same manner that the hypereutectic piston in this query was,(shattered), so that we can eliminate the metal's composition as a factor for why it failed.

Oh and, just so we don't have any further confusion on this matter, when you post your evidence please include some kind've documentation verifying that it is indeed a forged piece.

It's put up or shut up time.

 

OK,damn good idea.
I nominate you to do the research and do the posting.
For us that have had HE pistons fail it is an established fact.
It is a fact hyper pistons are not as strong as forged,period.

 

I dunno racerdude, I think this one's gonna be too tough for even me. I think I'll take my chances on the Area 51 recon stuff, oh and of course, that little Jimmy Hoffa side project.