07-29-2021, 05:34 PM | #23 | |
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It isn't proof of anything. I'm not saying it definitely isn't forged, my stance is there isn't any proof that is substancial that it is forged. So I'm personally not willing to believe it's forged and spread rumours about it until it's proven. So I came here to see if anyone had proof of forging. Also it's not that the posts are "wrong" (they could be right they could be wrong it is yet to be determined) as currently the construction of the rod isn't fully determined yet, it's more to do with the fact that someone is willing to state for a fact and act like their word is final that the rods are forged based on terrible sources and poor real OEM cross referencing that I'm here to correct. I personally don't have a solid stance to whether the rods are forged or cast, I'm here to seek solid evidence and will offer my counter opinion when I see poor sources. Do I care so much I'm loosing sleep, absolutely not, I'm personally interested in investigating this topic so I'm posting meaningful rebuttles.
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07-29-2021, 06:18 PM | #24 | ||
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07-29-2021, 06:51 PM | #25 | |
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Yeah I would love to have some pictures, side profile, rod cap, and front on if you could. Essentially as many pictures as possible. However even with those images I am not an expert enough in metallurgy to tell 100% if it is forged or not without a cast reference. But it would be better than any pictures I have seen so far. On the n55 crank shaft it is easy to tell if it is forged or not because you have characteristic traits of forged crank shafts: the wide parting marks, the rounded counter weights, and a comparison between a casted version which shows the distinction between parting lines and counter weights to affirm that.
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07-29-2021, 07:01 PM | #26 | |
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This is an n54 rod (literally the best example of rod pictures - no oil, no discoloration, very clear and shows the side of the rod up close unlike every other image I have seen so far) if the parting lines are similar and go to the rod cap as well, then it will highly likely (more likely than with one source alone but I still wouldn't trust my own judgement 100% and if there are bmw technical documents too that would bring the confidence to 100%) the m2 n55 has forged rods as well just like those sketchy sources say.
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08-08-2021, 08:05 AM | #28 | |
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08-27-2021, 02:40 AM | #29 |
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I was looking around tonight and stumbled upon this:
https://www.bim merboo st.com/showthread.php?96803-Maximum-PSI-offering-forged-S55-pistons-and-rods-for-F80-M3-F82-M4-and-F87-M2-Competition] (Remove the spacing) If you scroll down enough you'll see the side of the s55/n55 rod on the right and there you'll see the parting line which does look pretty wide. And imo (not an expert so I still could be wrong) it looks like it is indeed a forged parting line. So the stock rod looks to be a powdered metal factured-forged connecting rod. SeanWRT my apologies for grilling you on your poor sources (didn't mean to be a dick before I just wanted to also get to the bottom of this with accurate information), but it looks like although that article was riddled with alot of misinformation it was correct about the rod. Also if you look at the numbers on the rod and compare it to the n54 rod from my ebay link, they're different rods like what I stayed earlier. However they're very similar in design.
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03-13-2024, 04:08 PM | #31 |
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The sound difference between the s55 and n55 is mainly due to the use of 2 turbos (turbos are the major factors affect sound), 2 down pipes, and unequal length mid pipes.
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