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    • ~500 whp the limit of the factory B58 turbocharger? BMW F21 M140i hits 501 whp flash tuned only

      You can count the number of factory turbo B58's topping 500 horsepower on one hand. It seems the limit or at least pretty darn close to it is that ~500 wheel range for the factory BMW B58 turbocharger. The last car we saw top 500 was a JB4 + BEF tuned 340xi.


      This M140i managed to also just eek out out a 501 whp Dynojet graph:


      Mods:
      E30 fuel and WMI
      Catless downpipe
      Wagner Radiator
      Remus race exhaust

      Yes, methanol is helping. It is also running an E30 ethanol blend.

      So far to BimmerBoost's knowledge this is the only flash tuned B58 to top 500 whp on the factory turbo.

      This article was originally published in forum thread: ~500 whp the limit of the factory B58 turbocharger? BMW F21 M140i hits 501 whp flash tuned only started by Sticky View original post
      Comments 14 Comments
      1. maxnix's Avatar
        maxnix -
        Once again, real world pump fuels would be much more indicative of what the engine can deliver on the road consistently.
      1. Bowser330's Avatar
        Bowser330 -
        I thought when people said 'E30" they were referring to a mixture of premium fuel and E85 that represents approximately an E30 (30% ethanol) fuel.

        I didn't think it was a special racing gas purchased in a drum called "E30"
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Bowser330 Click here to enlarge
        I thought when people said 'E30" they were referring to a mixture of premium fuel and E85 that represents approximately an E30 (30% ethanol) fuel.
        They are. Not sure why you took it otherwise.
      1. vrsixxxxxx's Avatar
        vrsixxxxxx -
        700tq holy cow....
      1. 93siro's Avatar
        93siro -
        Click here to enlarge Originally Posted by vrsixxxxxx Click here to enlarge
        700tq holy cow....
        NM
      1. Bowser330's Avatar
        Bowser330 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        They are. Not sure why you took it otherwise.
        It was a facetious question because maxnix said ....."Once again, real world pump fuels would be much more indicative of what the engine can deliver on the road consistently."

        So it clearly IS real world pump fuels, E85 and 91/93 or whatever...
      1. Peter @ Pure/PTF's Avatar
        Peter @ Pure/PTF -
        It's our M140 shop car still running stock turbo for now. The car does consistent low 7s 100-200. Over 6 runs done after eachother 2 were 6.9x and 3 were 7.0x and 1 was 7.1x 100-200. Qmile on street with P4S with a 2.0 60ft was 11.56 (RWD car)
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Peter @ Pure/PTF Click here to enlarge
        Qmile on street with P4S with a 2.0 60ft was 11.56 (RWD car)
        At what trap speed?
      1. Peter @ Pure/PTF's Avatar
        Peter @ Pure/PTF -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        At what trap speed?
        202kph (126 mph)Attachment 58988Attachment 58988
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Peter @ Pure/PTF Click here to enlarge
        202kph (126 mph)
        Did you post this before? 126 trap stock turbo is great.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Peter @ Pure/PTF Click here to enlarge
        202kph (126 mph)
        Also, would you post the 6.9 100-200 please?
      1. Peter @ Pure/PTF's Avatar
        Peter @ Pure/PTF -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Did you post this before? 126 trap stock turbo is great.
        I only posted on our instagram story. Yes its quite fast Click here to enlarge
      1. Peter @ Pure/PTF's Avatar
        Peter @ Pure/PTF -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Also, would you post the 6.9 100-200 please?
        Sure. Attachment 58989
        Attachment 58990
      1. zinner's Avatar
        zinner -
        Click here to enlarge Originally Posted by maxnix Click here to enlarge
        Once again, real world pump fuels would be much more indicative of what the engine can deliver on the road consistently.
        I don't get the E30 part of the equation when you are also using water/meth injection. According to the internet E30 is 94 octane, why not just roll with 93 octage (10% ethanol). Is that extra point of octane worth it or is E30 more than 94 octane?

        I have been using WMI (50/50) and 93 octane on my 335i for a couple years now, so I think the fueling method is acceptable.