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Old 01-20-2009, 09:11 PM   #1
inlinesicks
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330 crank in a 323?

So my question is, if I bought the crank, rods, and pistons from a 330 and swapped them into my 323 and reprogrammed the ecu would I basically have a 330 engine? Would I have to get a head from a 330 or are they the same? Are there any other things I would have to do?

This is just a theoretical question because I am aware of how much those parts would cost, Im just asking out of curiosity.
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Old 01-20-2009, 09:19 PM   #2
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The bore is different aswell. so even though you are stroking, you would need that extra displacement to fit those pistons with the proper rings.

I think this should be moved to the engine and dme section of the forum btw
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Old 01-20-2009, 09:27 PM   #3
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Quote:
Originally Posted by SL Blak Soldier View Post
The bore is different aswell. so even though you are stroking, you would need that extra displacement to fit those pistons with the proper rings.

I think this should be moved to the engine and dme section of the forum btw
Oh I didn't know the bore was different, what if I did the same thing but with the parts from a 328, Im sure the bore is the same on a 328 right?

Oh and sorry about putting this in the wrong place, Im a forum noob
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Old 01-20-2009, 10:04 PM   #4
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No the m54 engines are bored and stroked versions of the m52. The 330's 3 liter has the largest bore.
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Old 01-20-2009, 10:31 PM   #5
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No the m54 engines are bored and stroked versions of the m52. The 330's 3 liter has the largest bore.
If I remember right, the bore of the 325 and 330 are the same.
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Old 01-20-2009, 10:47 PM   #6
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If I remember right, the bore of the 325 and 330 are the same.
hmm so you saying that the stroke is whats diff between 325 and 330?
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Old 01-20-2009, 10:59 PM   #7
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hmm so you saying that the stroke is whats diff between 325 and 330?
Yep, the M54B30 (E46 330) reuses the crankshaft from the S52B32 (US E36 M3) and has a better flowing intake manifold. Most of the power gains are from the intake manifold though.
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Old 01-20-2009, 11:11 PM   #8
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Originally Posted by mkodama View Post
Yep, the M54B30 (E46 330) reuses the crankshaft from the S52B32 (US E36 M3) and has a better flowing intake manifold. Most of the power gains are from the intake manifold though.
are you talking about the differences between the m54 vs the s52 being the mani? if so where did that extra .2 liters come from? or the m54 vs the 325 motor (sorry don't know the code)

btw stick with the 190e evo sig, it looks sick compared to the csl sig.
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Old 01-20-2009, 11:23 PM   #9
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This is interesting. I was thinking the same a few weeks ago.
So,I have a '04 325 sedan sport.What do I need to upgrade from 2.5L to 3.0L?
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nice try on the sig you tard. unfortunately, when you click the link you see the actual quote.

you are on a roll with the FAIL tonight. :lmao:
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Old 01-20-2009, 11:43 PM   #10
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Originally Posted by SL Blak Soldier View Post
are you talking about the differences between the m54 vs the s52 being the mani? if so where did that extra .2 liters come from? or the m54 vs the 325 motor (sorry don't know the code)

btw stick with the 190e evo sig, it looks sick compared to the csl sig.
I was talking about the differences of the 325 and 330. The crankshaft, and intake manifold are the two main differences.

And thanks about the sig, but it's a rotating signature. Everytime you refresh the page it will be 1 of 5 or 6 cars I like.

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Originally Posted by ejamin73 View Post
This is interesting. I was thinking the same a few weeks ago.
So,I have a '04 325 sedan sport.What do I need to upgrade from 2.5L to 3.0L?
Crankshaft, intake manifold, ecu, MAF, throttle, intake system, and other things. I'm not sure on all the details.

It's probably easier to just get a 330 engine and ECU, and swap it with you engine, and then sell yours.
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Old 01-20-2009, 11:56 PM   #11
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Originally Posted by mkodama View Post
I was talking about the differences of the 325 and 330. The crankshaft, and intake manifold are the two main differences.

And thanks about the sig, but it's a rotating signature. Everytime you refresh the page it will be 1 of 5 or 6 cars I like.


Crankshaft, intake manifold, ecu, MAF, throttle, intake system, and other things. I'm not sure on all the details.

It's probably easier to just get a 330 engine and ECU, and swap it with you engine, and then sell yours.
Thanks for the info
I think is better to get a 330 engine & keep the other for a while just in case.
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nice try on the sig you tard. unfortunately, when you click the link you see the actual quote.

you are on a roll with the FAIL tonight. :lmao:
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Old 01-21-2009, 12:04 AM   #12
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bore on both m52b25 (323ci) and the m54b30 (330ci) are the same 84mm the difference between the displacement is the 14ish mm of stroke..... look up bmw_chuzo's thread about his 3.0 stroker

btw the exhaust cams are the same between the 325 and the 330 just a better flowing intake cam for the 330 (minus the zhp)

i have a 3.0 crank if anyone is interested
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Old 01-21-2009, 12:13 AM   #13
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Note: engine names m54b30 (330) and m54b25 (325) they r both m54. M52 engines go the same way.
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Old 09-03-2014, 06:31 PM   #14
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What kind of time would be involved in removal of my 323 engine taking off the oil pan and swapping the whole rotating assembly with one from a 330, sealing the whole thing up and dropping it back in thr car. Assuming I have the engine hoist and all necessary tools on hand
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