M50TU dyno results inside

[Voluted]

Took my car to a dyno recently to see how the engine was doing and here's the result:



The peak figures seem to be fine considering it's basically a stock motor, but I'm concerned with the roughness under 4.5k rmp. A sign that the vanos seals are leaking perhaps?

[Voluted]

Other results from the same day for comparison:

E46 M3 AA Stage-2 (385wHP SAE, 294lbft)

E93 335i stock (255wHP SAE, 277lbft)

E90 335ia JB4, downpipes, exhaust, intercooler, (344wHP SAE, 407lbft)

E36 M3 4-dr (209wHP SAE, 201ftlb)

E93 335i MarkD tune, BMW exhaust (311.1wHP SAE, 343.6lbft)

E90 330i bolt-ons (215.1wHP SAE, 208.2ftlb)

E46 M3 AA Prima (365.8wHP SAE, 256.6ftlb)

Saab 9-3 Turbo (200.1wHP SAE, 248ftlb)

E46 M3 ZCP Stock (285.2wHP SAE, 233.8ftlb)

E46 M3 VF Stage-2 (403wHP SAE, 271.1ftlb)

E46 330i Hamann Supercharged (204.6wHP SAE, 195.1lbft)

E46 330ci supercharged (252.4wHP SAE, 225ftlb)

E38 740iL intake (239.5wHP SAE, 320.2lbft)

C6 Vette LS3 (380.6wHP SAE, 368.3ftlb)

Mini Cooper S turbo (161.0wHP SAE, 192.0ftlb)

E39 M5 full exhaust (353.7wHP SAE, 320ftlb)

E60 535i stock (243.3wHP SAE, 261.1ftlb)

E36 M3 Euro stock (243.9wHP SAE, 218.6ftlb)

Ford Expedition Tow-Vehicle 4.6L (191wHP SAE, 292ftlb)

E28 S54 (280.7wHP SAE, 240.9ftlb)

[lolcantturn]

Other results from the same day for comparison:

E46 M3 AA Stage-2 (385wHP SAE, 294lbft)

E93 335i stock (255wHP SAE, 277lbft)

E90 335ia JB4, downpipes, exhaust, intercooler, (344wHP SAE, 407lbft)

E36 M3 4-dr (209wHP SAE, 201ftlb)

E93 335i MarkD tune, BMW exhaust (311.1wHP SAE, 343.6lbft)

E90 330i bolt-ons (215.1wHP SAE, 208.2ftlb)

E46 M3 AA Prima (365.8wHP SAE, 256.6ftlb)

Saab 9-3 Turbo (200.1wHP SAE, 248ftlb)

E46 M3 ZCP Stock (285.2wHP SAE, 233.8ftlb)

E46 M3 VF Stage-2 (403wHP SAE, 271.1ftlb)

E46 330i Hamann Supercharged (204.6wHP SAE, 195.1lbft)

E46 330ci supercharged (252.4wHP SAE, 225ftlb)

E38 740iL intake (239.5wHP SAE, 320.2lbft)

C6 Vette LS3 (380.6wHP SAE, 368.3ftlb)

Mini Cooper S turbo (161.0wHP SAE, 192.0ftlb)

E39 M5 full exhaust (353.7wHP SAE, 320ftlb)

E60 535i stock (243.3wHP SAE, 261.1ftlb)

E36 M3 Euro stock (243.9wHP SAE, 218.6ftlb)

Ford Expedition Tow-Vehicle 4.6L (191wHP SAE, 292ftlb)

E28 S54 (280.7wHP SAE, 240.9ftlb)

why

[Roysneon]

Yeah, I expected more torque. Is that a gas or diesel engine?























But on the realz, those are good numbers for a stock motor. Any mods at all? M50tuB25?

[Voluted]

Ebay shorty headers, no clutch fan, Mark D chip. Yeah it's an M50TUB25.

I replaced the BKR6EIX plugs that were in there with the OEM BKR6EK plugs and the engine revs noticeably smoother off load (rev-matched down-shifting is much easier). I don't really notice any change while driving though. I'm frustrated because two years ago when I bought the BKR6EIX plugs they were listed for my engine. Since then they have been taken off the listing and NGK now ONLY lists the OEM style plug for these engines. I contacted them and they said they found engines running anything but the BKR6EK from them were having ignition/emission issues. Thanks NGK!




No thoughts about that roughness under 4.7k from any one??