How is the Euro-spec M3s 3.2-liter engine (S50 B32) different from the previous version (S50 B30)?
Euro-spec M3’s 3.2-liter engine (S50 B32) is much more powerful as compared to previous version. It has a bore of 86.4mm and a stroke of 91mm, the It has a total displacement of 3,201cc. However, the S50 B32 incorporates the following special features which produce an striking 321 hp (DIN) at 7,400rpm and 258 lb/ft of torque at 3,250 rpm:
-Individual throttle plates for each cylinder
-Increased compression ratio to 11.3:1
-Advanced BMW/Siemens MSS50 engine management system able to compute 20 million instructions per second
-Lightweight pistons
-Dual-mass flywheel
I was planning to buy a car so friend suggested me to take information from the engineers who are working on them. I got this complete information from European Auto Tech.
When creating the 3.2-liter M3 engine, BMW M relied upon much of the experience it had gained when designing the V12 engine for the McLaren F1 supercar. In the end, the S50 B32 incorporated the following improvements over the S50 B30 engine used in the original Euro-spec E36 M3: -Increased bore to 86.4mm (from 86.0mm) and lengthened stroke to 91.0mm (from 85.8mm) for a total capacity of 3,201cc (from 2,990cc) -Increased compression ratio to 11.3:1 (from 10.8:1) -Advanced BMW/Siemens MSS50 engine management system able to compute 20 million instructions per second -Double VANOS continuously variable valve timing on both intake and exhaust strokes -Lightweight pistons -Improved dual-mass flywheel -Graphite-coated conrods -Larger inlet valves -More efficient intake and exhaust systems -Second oil pump The result of these changes boosted horsepower from 286 hp (DIN) at 7,000 rpm to 321 hp (DIN) at 7,400 rpm. Maximum torque also increased from 236 lb/ft at 3,600 rpm to 258 lb/ft at 3,250 rp
