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    • 1st popped Supra B58 - Motor let go around at 650+ whp

      This is the first documented failure of a tuned Supra B58 motor. Why did it fail? Who knows. BMW is being blamed by the person doing the work here but that seems like a bit of a stretch with tuning and fueling limitations more likely to be the reason.


      They reached the limit of the fuel system which is rather easy to do. It is why XDI is working on an HPFP upgrade. It is also why so many B58 tuners are running supplemental methanol injection.

      They hit around 650 whp, maxed out the fuel system, and then added methanol and another 4 psi of boost:


      So is it an internal issue when going past 650 whp? Maybe. We have no graph to go on and no logs. It could be tuned for a big torque hit down low and a rod let go.

      It is early on and people are learning. The motor is to be disassembled but considering they are already blaming BMW for this failure before even taking it apart you likely can not trust the conclusion.

      All we know is the motor let go and you will want fueling upgrades and a quality tuner especially if running a big turbo.

      We will see what, if anything, we learn from the teardown.

      EFR turbo max 27psi and fuel system max'ed out at 24psi.
      Turbo made 25psi at 3000 rpm.
      Built engine next week and with 800ish wHP.
      No information on fuel, meth, octane, etc given.

      This article was originally published in forum thread: 1st Blown Supra A90 B58 Engine started by CobraMarty View original post
      Comments 20 Comments
      1. richpike's Avatar
        richpike -
        Good find. Was bound to happen. The B58 is a stout engine, but everything has its limits. I do enjoy how quickly the A90 is pushing things.

        -Rich
      1. CobraMarty's Avatar
        CobraMarty -
        Attachment 59581
      1. CobraMarty's Avatar
        CobraMarty -
        BW EFR 8474!!
      1. CobraMarty's Avatar
        CobraMarty -
        Attachment 59582
      1. Payam@BMS's Avatar
        Payam@BMS -
        Interesting.
      1. lulz_m3's Avatar
        lulz_m3 -
        Click here to enlarge Originally Posted by CobraMarty Click here to enlarge
        Did he review the BMW Factory security footage to come to that conclusion?
      1. Sticky's Avatar
        Sticky -
        This is the first documented failure of a tuned Supra B58 motor. Why did it fail? Who knows. BMW is being blamed by the person doing the work here but that seems like a bit of a stretch with tuning and fueling limitations more likely to be the reason.

        Click here to enlarge

        They reached the limit of the fuel system which is rather easy to do. It is why XDI is working on an HPFP upgrade. It is also why so many B58 tuners are running supplemental methanol injection.

        They hit around 650 whp, maxed out the fuel system, and then added methanol and another 4 psi of boost:

        Click here to enlarge

        So is it an internal issue when going past 650 whp? Maybe. We have no graph to go on and no logs. It could be tuned for a big torque hit down low and a rod let go.

        It is early on and people are learning. The motor is to be disassembled but considering they are already blaming BMW for this failure before even taking it apart you likely can not trust the conclusion.

        All we know is the motor let go and you will want fueling upgrades and a quality tuner especially if running a big turbo.

        We will see what, if anything, we learn from the teardown.

        EFR turbo max 27psi and fuel system max'ed out at 24psi.
        Turbo made 25psi at 3000 rpm.
        Built engine next week and with 800ish wHP.
        No information on fuel, meth, octane, etc given.
      1. Stevenh's Avatar
        Stevenh -
        Is this clown really trying to blame BMW for the failure?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Stevenh Click here to enlarge
        Is this clown really trying to blame BMW for the failure?
        It appears that way.

        Who even are these people? Who was the tuner?
      1. IllSic_Design's Avatar
        IllSic_Design -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        It appears that way.

        Who even are these people? Who was the tuner?
        Twisted Tuning knows who tuned it according to their post on supramkv.com
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by IllSic_Design Click here to enlarge
        Twisted Tuning knows who tuned it according to their post on supramkv.com
        How do we know it wasn't Twisted Tuning?
      1. DomiN54ik's Avatar
        DomiN54ik -
        Heared something about PureBoost from Germany tuning the car. Probably running AFR 15 and check engine light on permanently. also at Race1000 half mile the car did not impress at all.
      1. stosh1's Avatar
        stosh1 -
        Click here to enlarge Originally Posted by Stevenh Click here to enlarge
        Is this clown really trying to blame BMW for the failure?
        Yeah, good luck w/that warranty claim-lol. Let's see, you replaced factory parts w/aftermarket performance parts, tuned the engine, doubled the factory horsepower...and now you want to blame it on the manufacturer!? Putz!
      1. Snertz's Avatar
        Snertz -
        Attachment 59589
      1. Eleventeen's Avatar
        Eleventeen -
        They probably think the cracked rod cap was an accident LOL.
      1. 135idct's Avatar
        135idct -
        so the n55 can handle more on that turbo, i think the problem from the tune
      1. kbaldi29's Avatar
        kbaldi29 -
        Click here to enlarge Originally Posted by DomiN54ik Click here to enlarge
        Heared something about PureBoost from Germany tuning the car. Probably running AFR 15 and check engine light on permanently. also at Race1000 half mile the car did not impress at all.

        Is the 15AFRs figured speech or this is actually coming from an actual fact? This is something doesnt just occur to someone unless you are someone that has been closely around this new gen ECUs or actually had to experience this first hand....

        For sure is one of those things that not many that work/tune this vehicles will disclose openly for two reasons... Either Found a way around the lean afr but not limitation and would never tell anyone about what he found, or who have not find the fix yet, but still decides to let it run lean... we all know it goes against all the basic rules, but just because was the easy way around the "limitation” and achieve higher than 23psi, this for some could justify the risk of ignoring the lean AFRs


        I apologize ahead of time for the perspective and the intrusiveness of my question, but once again.... Just very odd to see someone that has one single post and recently joined the forum, Shine In and mention something not many know....

        regardless of the nature of your initial post... I think is very easy to get one this cars to run lean and not realize it until is too late, , but not precisely because they are out of room in their fuel system!
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by stosh1 Click here to enlarge
        Yeah, good luck w/that warranty claim-lol. Let's see, you replaced factory parts w/aftermarket performance parts, tuned the engine, doubled the factory horsepower...and now you want to blame it on the manufacturer!? Putz!
        I think they are just trying to absolve themselves from blame. If they really felt it was BMW's fault why not have BMW cover it? They won't.
      1. stosh1's Avatar
        stosh1 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        I think they are just trying to absolve themselves from blame. If they really felt it was BMW's fault why not have BMW cover it? They won't.
        Yerp, agreed, not so much accusing BMW directly...as deflecting blame.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by stosh1 Click here to enlarge
        Yerp, agreed, not so much accusing BMW directly...as deflecting blame.
        I have pics and details on this but they don't want me to post just yet.

        Hopefully I'll be able to shed some light and clear this up.