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      11-26-2013, 12:37 PM   #201
CanAutM3
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Quote:
Originally Posted by Boss330 View Post
I know how a special plant works when we are talking about a small dedicated number of engines. I have been at the Cosworth facility in the UK and seen the assembly process of their F1 engines and road going engines (Like some Aston Martin and Ford Cosworth Duratec engines). However those are fairly small numbers, like a few hundreds or maybe low thousands a year, the S65 was made in 60.000 so it's hardly hand built.

To me, that indicates that the S65 and other M engines are mass produced on a assembly line, not hand built. Then the Munich assembly line has to be better than the one at the Steyr plant to make a difference.

The Munich engine facility makes 300.000 engines per year and the Steyr plant makes just over 1.000.000 engines per year, but with "only" 300.000 of those engines being petrol engines, the rest being diesels.

Overvierw over BMW plants:
http://www.bmwgroup.com/e/0_0_www_bm...rte/index.html

BMW Munich plant:
http://www.bmw-plant-munich.com/lowb.../en/index.html



The above plant info hasn't been updated for some time it seems... And, looks like it's only the V12 of the above engines still being produced on the "Special assmbly line" at Munich.

BMW Steyr plant:
http://www.bmw-plant-steyr.com/

So far I haven't found any indications of such a low volume manufacturing process at Munich to compare with a true dedicated plant such as I witnessed at Cosworth's facility and assembly of Aston Martin engines etc. In fact it seems more like the special plant is there to assemble the "odd" engines that doesn't fit in the mainstream lines than it exists for higher tolerances etc.

This thread also shows that the S65 "sticks out like a sore thumb" compared to other BMW engines when it comes to clearances...

http://www.m3post.com/forums/showthread.php?t=892838
You need to compare apples to apples when comparing volumes...

The S65 was produced over 7 years, meaning a yearly volume of about 8500 engines. That represents less than 1% of the Steyr plant output and less than 3% of the Munich plant production.

I work in the engine manufacturing business, and I can attest that an engine built on a dedicated production line with dedicated resources gets more attention. It is however much more expensive because of it...