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Does anyone have a link or can provide info about specs for the M30 B9 and B10 motors? I am looking for camshaft specs, piston size and compression ratios, valve sizes, etc. Thank you!
 

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There are actually quite a range of M30 engines that were fitted to 'B9' and 'B10' cars, as well as the similar and sometimes identical engine fitted to the E32 'B11' cars.

The Weiss-Blau Alpina book lists these Alpina engine numbers for 3.5 litre M30 N/A based engines;

B9, E28 and E24
B9/1, E28 and E24
B9/2, E30
B10, E28 and E24
B10/2, E30
B10/3, E30
B10/4, E30
B10/5, E30
B10/6, E30
B11, E32
B11/1, E32
B11/2, E32 and E34
B11/3, E32 and E34

Good luck in figuring out what the differences are :confused:
 

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Discussion Starter #4
I have a 1982 E28 B9 and the motor pulls much harder than my 1988 E34 B10, so I was curious what was different internally in terms of cam duration, compression, valve sizes, etc
 

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Both engines have 47/39 valves with a 1.72 head gasket. The B9 is a 93.4 bore 84 stroke making it a 3453cc. The B10 is a 92 bore with 86 stroke making it a 3430cc. The B9 makes 320nm where as the B10 312nm both at 4000.

For the B9, Alpina claims a 0-100 km/h time of 6,7 seconds and a top speed of 240 km/h. For the B10, Alpina claimed a 0-100 km/h time of 7,4 seconds and a top speed of 252 km/h.
 

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I have bought recently a B11/2, i think from a E32.
The plan is to put it in an E28 528i.
Does anyone know what specs it has? On the official Alpina website they only mention a B11/1 and B11/3

Grtz Nick
 

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Thanks a lot!

I am especially curious about the power and torque of this block. 240 HP or 254 HP? 310Nm or 330 Nm?
Probably there will also be the 280 ° camshaft in it?

I already bought the Dbillas Dynamics Throttle body unit for some better flow, and now looking for a decent spaghetti.

Planning to strip the block and rebuild it completely before the swap to my E28

Is there something like an Alpina manual to set the timing etc.? Or just use the Bentley or factory manual?

Grtz Nick
 

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So, The engine is finished, at this moment 279 HP, i just need a decent motor management for tuning the engine properly.
Alpina did a great job ! :)
 
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