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Turbo charged or not, doesn't matter. What matters is the revs.
It is the revs that put an enormous load on rods, pistons and pins. Not the boost. Period.
That's my point too.
Internet is a great place to learn from but there are people there who know a thing or two about alloys. And about metallurgy science.
Otherwise, it is great to learn from the internet. :)
Andrew, it is a 2618 piston if its JE and it's turbo charged imo I base this on the forging they used
Je diagnosed it as inorrect install saying the locks came out of groove and pin moved out of position. It doesn't look like good fi pin imo looks very thin wall so the pin flex works the piston bosses.
Regardless of the alloy on any part the geometry has to be appropriate
improper circlip install was my first thought as well. Unfortunally pictures in that post were not good enough to focus on areas of interest for telltail signs of circlip failure: opposite/undamaged side piston balcony area, rounding of the edges on the broken side, circlip marks on the side of the wrist pin or the lack of, etc.
Turbo charged or not, doesn't matter. What matters is the revs.
It is the revs that put an enormous load on rods, pistons and pins. Not the boost. Period.
ned this before (30K miles)? I guess you sold quite a lot of pistons of this alloy while working for IE?
To play the devils advocate if 2618 wasn't strong enough maybe none of us should contemplate building engines anymore....
There is a thread on here where guy tightened an Arp head stud and it broke must be the wrong material for the job
89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
@SkiFree - while you are being generous about the 2618 alloy, how come you never mentioned this before (30K miles)? I guess you sold quite a lot of pistons of this alloy while working for IE?
Fair enough question. I went over pros/cons with whomever asked for my input.
I'm sure I've seen him mention Itva couple years ago atleast, iirc in a thread about the new IE mahle ms Pistons one of the driving reasons behind it. It may have been in his build thread
89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
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