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      05-08-2014, 08:18 AM   #1
Kiwi123
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Anyone can tell the difference between 30d and 40d?

I am wondering how to distinguish between 30d and 40d. Is there any different visual features under their engine bonnets? Any help is much appreciated.
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      05-08-2014, 08:34 AM   #2
lovec1990
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i think there is a visual diffrence in under bonnets, but you can see it from outside if its standard model(no msport) 30d has round exhaust tips 40d doesnt
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      05-08-2014, 10:17 AM   #3
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In Msport guise the 40d is supposed to come with a titanium grill, the 30d a black grill. However in Europe a lot of 40s have been delivered without them.

Think it's the same on the SE also, not 100% sure.

Rounded exhaust pipes are an SE feature. Msport's are rectangular.
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      05-08-2014, 10:53 AM   #4
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What are the mechanical differences?
50d, 40d and 30d all come with a 3liter engine. I am guessing turbo size and software are different.
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      05-08-2014, 11:04 AM   #5
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The 30d has one variable-geometry turbocharger, the 40d has two turbochargers and the 50d has three turbochargers.
The four cylinder 25d has two turbochargers.
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      05-08-2014, 11:26 AM   #6
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So theoretically, we can create a 50d in the states. Different exhaust manifold, 50d injectors, software and turbochargers.
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      05-08-2014, 11:37 AM   #7
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Quote:
Originally Posted by greentrbo95gst View Post
So theoretically, we can create a 50d in the states. Different exhaust manifold, 50d injectors, software and turbochargers.
Simply buy the entire engine (N57D30S1) from BMW you could even tune it afterwards.
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      05-08-2014, 11:39 AM   #8
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Quote:
Originally Posted by phantomac2 View Post
Simply buy the entire engine (N57D30S1) from BMW you could even tune it afterwards.
I thought the short blocks were all the same in the 30, 40 and 50
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      05-10-2014, 06:33 AM   #9
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Quote:
Originally Posted by phantomac2 View Post
The 30d has one variable-geometry turbocharger, the 40d has two turbochargers and the 50d has three turbochargers.
The four cylinder 25d has two turbochargers.
Thanks for the comments. Can I see those turbochargers difference in the bonnet?
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      05-10-2014, 11:32 AM   #10
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If you take off the plastic cover.
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