• Burger Motorsports N55 (2011 on 135i/335i) Stage 2 dyno results with meth injection - 372 wheel horsepower, stock turbocharger already maxed out

      The car is our 2011 135i w/ DCT, JB4 (Stage2), AR 4" downpipe, and WW quick install meth kit. I have an N55 Helix IC for it but have not had time to install it yet, hopefully soon! The car is using the same Shell 91 octane + NOS octane booster it's been on for the past 3k miles. Temps were in the low 70s. For today's meth testing I wound up having to run 100% duty cycle most of the power band. Meaning the JB4 is working the wastegate as much as it can be worked. And even in that trim it struggled to hold 17psi @ 5000rpm and 13psi @ 6000rpm.

      Overall I'm happy with the results but sad to report this motor with the stock turbo is about tapped out at around 370rw. Maybe with the IC on cold day we can extend that to 385rw. But it's going to take a questionably loose dynojet and a prayer to get to 400rw.

      On the plus side I superimposed one of the runs against the same car when it was stock and was pleased with the 100whp delta.

      Despite the small turbo you guys are going to *love* Stage2. All the N54 functionality is there, we've put lagfix back in, and partial throttle is buttery smooth.





      This article was originally published in forum thread: N55 + Stage2 + Meth Dyno Results started by Terry@BMS View original post
      Comments 24 Comments
      1. Terry@BMS's Avatar
        Terry@BMS -
        Tapers to 13psi @ 6000rpm give or take. 370rw is no slouch but it ain't say 430rw. I avoided posting a comparison N54 overlay to avoid depressing N55 guys. Click here to enlarge
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
        Tapers to 13psi @ 6000rpm give or take. 370rw is no slouch but it ain't say 430rw. I avoided posting a comparison N54 overlay to avoid depressing N55 guys. Click here to enlarge
        It's ok, the N55 guys will get the N54 guys back when they have a working single turbo upgrade.
      1. oddjob2021's Avatar
        oddjob2021 -
        Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
        I avoided posting a comparison N54 overlay to avoid depressing N55 guys. Click here to enlarge
        that would be great actually Click here to enlarge but it would be interesting to see the torque curve difference, including spool time, im sure you can find one with similar mods.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by oddjob2021 Click here to enlarge
        that would be great actually Click here to enlarge but it would be interesting to see the torque curve difference, including spool time, im sure you can find one with similar mods.
        We posted N55 and N54 overlays, courtesy of BMS: http://www.bimmerboost.com/showthrea...-whp-94-octane
      1. oddjob2021's Avatar
        oddjob2021 -
        i remember that thread and my posts/questions, but the dynos in that thread are for stock cars, these cars will be modded.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by oddjob2021 Click here to enlarge
        i remember that thread and my posts/questions, but the dynos in that thread are for stock cars, these cars will be modded.
        I'm sure we can get modded overlays as well.
      1. black bnr32's Avatar
        black bnr32 -
        jeez, not a fan of that powerband.
      1. fundahl's Avatar
        fundahl -
        Well, that's what happens when people $#@! about lag. Click here to enlarge

        Really though, I bet it feels great around town. Nothing beats that surge of torque from a big turbo(s) once it finally spools though. Not to mention sounding like a jet! Click here to enlarge

        The time will come, both for the N54 AND the N55. Click here to enlarge
      1. Itsbrokeagain's Avatar
        Itsbrokeagain -
        I cant wait to see how this stacks up on the shop car. Terry get that IC installed already!!
      1. Terry@BMS's Avatar
        Terry@BMS -
        I'm sure it will go 11s on a cool night. If I can keep that wheel hop away. Hoping the 1st gear limiting does the trick.
      1. DinoNac's Avatar
        DinoNac -
        For $500 my F10 N55 had FBOs and I added the BMS meth kit and look at. Drop off in the boost curve at higher rpm is dramatically reduced and I'm hitting boost levels I didn't think were possible, and weren't without the meth.
      1. Ak335i's Avatar
        Ak335i -
        Click here to enlarge Originally Posted by DinoNac Click here to enlarge
        For $500 my F10 N55 had FBOs and I added the BMS meth kit and look at. Drop off in the boost curve at higher rpm is dramatically reduced and I'm hitting boost levels I didn't think were possible, and weren't without the meth.
        epic bumps in forummmm hisssttoorrry.... repped lol
      1. ezec63's Avatar
        ezec63 -
        How do you know your power is not falling off? Lets see a dyno my bro inlaw has the same car except no inter cooler or meth kit yet and coming from my c63 it def still feels like its dropping off hard uptop. The constant gear changes and short rpm drops make it feel like its not but it sure is. Best to shift before redline as well
      1. ezec63's Avatar
        ezec63 -
        Click here to enlarge Originally Posted by DinoNac Click here to enlarge
        For $500 my F10 N55 had FBOs and I added the BMS meth kit and look at. Drop off in the boost curve at higher rpm is dramatically reduced and I'm hitting boost levels I didn't think were possible, and weren't without the meth.
        See post above
      1. DinoNac's Avatar
        DinoNac -
        Click here to enlarge Originally Posted by Ak335i Click here to enlarge
        epic bumps in forummmm hisssttoorrry.... repped lol
        I don't know what that means I'm sorry.
      1. ezec63's Avatar
        ezec63 -
        Click here to enlarge Originally Posted by DinoNac Click here to enlarge
        I don't know what that means I'm sorry.
        Check your private message !!!!
      1. DinoNac's Avatar
        DinoNac -
        Click here to enlarge Originally Posted by Ak335i Click here to enlarge
        epic bumps in forummmm hisssttoorrry.... repped lol
        I don't know what bumps means I'm sorry. Seen it many times, maybe you can tell me.
      1. DinoNac's Avatar
        DinoNac -
        Click here to enlarge Originally Posted by ezec63 Click here to enlarge
        How do you know your power is not falling off? Lets see a dyno my bro inlaw has the same car except no inter cooler or meth kit yet and coming from my c63 it def still feels like its dropping off hard uptop. The constant gear changes and short rpm drops make it feel like its not but it sure is. Best to shift before redline as well

        Im not saying there's no reduction in boost psi at the higher end of the power band but its drastically reduced from previously without meth. I can see that from datalogs which I do constantly. And yes I do short shift.
      1. Ak335i's Avatar
        Ak335i -
        Click here to enlarge Originally Posted by DinoNac Click here to enlarge
        I don't know what bumps means I'm sorry. Seen it many times, maybe you can tell me.

        Lol no worries. It means you brought back a thread from 2011.. It's fine though it means you searched I reckon So I "liked" your post and positive repped you! Good work
      1. ezec63's Avatar
        ezec63 -
        Check your pm Click here to enlarge