Quote:
Originally Posted by SeanWRT
Guys, see below. The same rod has been shared across N54/N55/S55 dated way back.
There're various sources to confirm forged rod for the M2/M3/M4. The same goes for the rest.
Forged rod has been very common for turbocharged engine for a long time.
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You're incorrect.
1) real OEM uses chassis service dates from the date that the chassis was introduced to the date it was decompressioned regardless of engine changes. So you must be careful about comparing engine parts based on chassis info because it doesn't factor in all the engine types.
For ex in this case only the n55 and s55 shared rods, n54 is not included despite real OEM saying a 2009 e9x car was there. What it actually means was the n55 in the E series shared the same rod but the system included the entire service date of the chassis which is a mistake.
https://www.realoem.com/bmw/enUS/par...&q=11247586491
11247586491 - the n54's connecting rod part number and it's different.
2) I don't see a single source verifying that the m2 has forged rods, if you have them in a bmw technical document not some advertising review (they're known to be wrong just like when they said the m2 had a closed deck block) then I would love to see it.
3) I wouldn't say turbo cars commonly have forged rods. While some more high end cars do have forged rods for the factory most cars do not. They have cast fractured split rod caps, most turbo cars don't have forged rods or cranks because of the cost to make them. Maybe on more expensive cars or performance cars sure but it is not extremely common.