B58 Beast

G20 M340i daily driver build — 500hp street sleeper

Stage 2 N54 335i build - full mod list and results

Stage 1 remap on 520d F10 - worth it?

E90 325i N52 - common problems and what to look for

BMW extended warranty - worth it or waste of money?

WTB: N54 stock downpipes - need for inspection

Charge pipe upgrade on N55 - which one?

E60 530d - the ultimate diesel touring car

VRSF 7.5 inch intercooler is the best value option. About 500 EUR and performs within 5% of the Wagner. I have it on my stage 2 335i and intake temps stay under 40C even on hot day...

5 months ago

500hp on stock turbos is achievable on the B58 but youre right at the limit. You need catless downpipe, FMIC, intake, and a very aggressive map on E30+ ethanol blend. On 98 octane,...

5 months ago

Nice results! The B48 is a great tuning engine. 305hp from a 2.0L turbo 4 is impressive. Did you notice any change in the exhaust note? Some B48 tunes add a bit more turbo whistle ...

5 months ago

This would be amazing. A searchable database where you can filter by engine code, tuner, and stage level. Would help people set realistic expectations for their builds.

5 months ago

I have a BM3 license for B58 that I might sell. Its the full license (not the lite version). PM me if interested. Car was sold so I dont need it anymore.

5 months ago

I agree that remote tuning is fine for stage 1. I had my M340i tuned remotely and the results were excellent - 395hp from the B58 with just a remap. The tuner sent me a pre-configu...

6 months ago

Running VRSF catless downpipe on my F30 340i B58 with BM3 stage 2 tune. The difference is night and day. Spool is noticeably faster and the turbo sounds incredible. Gained about 35...

6 months ago

B58 owner here running BM3 flex fuel. The B58 is arguably the best platform for E85 because the stock fuel system handles significant power gains without hardware upgrades. My M340...

6 months ago

Nice numbers! I have a similar setup but running BM3 instead of MHD. Getting 415hp on 98 octane. The N54 is such a beast of an engine.

6 months ago

B58 M240i (G42) on Mustang dyno: Stock: 310whp / 460Nm Stage 1 (BM3 OTS map): 395whp / 570Nm Stage 2 (BM3 + VRSF DP + CSF FMIC): 455whp / 630Nm The B58 is absolutely insane. Stage ...

7 months ago

had the same issue. turned out my ENET cable was a cheap knockoff that didnt work properly. bought a better one from a BMW coding forum vendor and it worked first try

7 months ago

I switched from MHD to BM3 on my B58 and the difference in map quality was noticeable. BM3 stage 2 map is smoother and makes more power.

7 months ago

methanol injection on S55 is the way to go for big power on stock turbos. you can push 550-580hp with meth and good tune

7 months ago