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  1. #1
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    World's most powerful BMW F80 M3 - RK-Tunes hits 1087 rwhp with single turbo S55 conversion

    Ladies and gentlemen, introducing the new overall S55 power record and the world's most powerful F80 M3. RK-Tunes previously topped 1000 rear wheel horsepower (being the first to do so) last year but criticism ensued due to the number coming from a Dynocom.

    Click here to enlarge

    Well, here is the new record on the Maximum PSI Dynojet:

    Click here to enlarge

    The mod list for those that did not memorize it:

    Motor Assembled in house by RK-Tunes
    Pauter rods
    ARP head studs
    Wiseco Maximum PSI Spec Pistons
    Maximum PSI Keyed Crank Hub
    Custom Top Mount manifold by Ricky at 88 Lab
    Dodson Clutches
    DSS Driveshaft and Axles
    Treadstone 4.5" Intercooler
    Southbay 1200cc port injectors
    Custom fuel system
    Chinese Intake Manifold
    TPG modified rear brake calipers
    17" wheels with drag radials or slicks
    BC Racing 2-way shocks and custom suspension

    We are well into the quadruple digit era of S55 power gentlemen.

    RK-Tunes is running into valve float issues (no surprise there, BimmerBoost stated this would happen) and they will push further once this is resolved:

    1087whp /902wtq. The new BMW S55 /F8x record. On a dynojet this time for the internet cry babies.

    Thanks for the dyno and upgrades @maximumpsi . After we fix the valve float we will be turning it up more. No piggy backs here.
    Congrats to all involved.

  2. #2
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    Very, very impressive.

    Technically it is running a piggy IIRC, for the secondary pump and injectors, and I think new map senor as well.
    Burger Motorsports
    Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s!

    It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.

  3. #3
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    In before debate over cold weather advantage...

  4. #4
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    Click here to enlarge Originally Posted by Eleventeen Click here to enlarge
    In before debate over cold weather advantage...
    I knew this was coming sooner or later. Not surprised it is from a Jersey member.

  5. #5
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    Sick!

  6. #6
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    how much boost? 40+?

  7. #7
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    Click here to enlarge Originally Posted by 135idct Click here to enlarge
    how much boost? 40+?
    They didn't say but something like that.

  8. #8
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    Very nice,what turbo is he using?

  9. #9
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    1087whp /902wtq. That is so impressive. Must take some serious boost.

    So what's next? Heavier valve springs, lighter retainers and locks.
    Any port work? More tuning? More boost?

    What are your charge intake air temps like at full boost at peak numbers?

    I have a N54 and N55 exhaust cam. Now I need a S55 exhaust cam.
    MILVs- +1mm Increase Intake Valve Lift for N52, N55, S55, N20 Engines
    http://www.bimmerboost.com/showthrea...ift-more-power
    www.bimmerMILVs.com
    Coming soon: +1mm lift Exhaust cam N52 and N55

  10. #10
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    Good stuff, curious to see how this build progresses

  11. #11
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    Amazing the platform does not have aftermarket cams yet. That should really help.

  12. #12
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    1 out of 1 members liked this post. Yes Reputation No
    The geometry of the intake valvetronic mechanism won't allow for a modified/aftermarket camshaft to work.

    An exhaust cam with an additional +1mm valve lift and 2-3* additional duration sure couldn't hurt.
    MILVs- +1mm Increase Intake Valve Lift for N52, N55, S55, N20 Engines
    http://www.bimmerboost.com/showthrea...ift-more-power
    www.bimmerMILVs.com
    Coming soon: +1mm lift Exhaust cam N52 and N55

  13. #13
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    Click here to enlarge Originally Posted by CobraMarty Click here to enlarge
    The geometry of the intake valvetronic mechanism won't allow for a modified/aftermarket camshaft to work.

    An exhaust cam with an additional +1mm valve lift and 2-3* additional duration sure couldn't hurt.
    Well that is a shame but one cam upgraded it better than none I assume. Still basically 1100whp from a 3 liter is impressive. I know other platforms make more with less.

  14. #14
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    Click here to enlarge Originally Posted by Torgus Click here to enlarge
    Well that is a shame but one cam upgraded it better than none I assume. Still basically 1100whp from a 3 liter is impressive. I know other platforms make more with less.
    MILVs will take care of the intake adding +1mm additional lift to the intake valve.
    I am working on an exhaust cam regrind also adding +1mm lift to the exhaust valve.
    MILVs- +1mm Increase Intake Valve Lift for N52, N55, S55, N20 Engines
    http://www.bimmerboost.com/showthrea...ift-more-power
    www.bimmerMILVs.com
    Coming soon: +1mm lift Exhaust cam N52 and N55

  15. #15
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    1 out of 1 members liked this post. Yes Reputation No
    Click here to enlarge Originally Posted by CobraMarty Click here to enlarge
    The geometry of the intake valvetronic mechanism won't allow for a modified/aftermarket camshaft to work.
    I can see how increased lift on the intake cam may not possible be because of the Valvetronic, but why wouldn’t you be able to increase duration?
    www.ExoticPerspective.com: The Automotive Photography & Cinematography Community

  16. #16
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    But you can increase the valve lift +1mm and duration +2-3*, just not with a different cam.
    MILVs- +1mm Increase Intake Valve Lift for N52, N55, S55, N20 Engines
    http://www.bimmerboost.com/showthrea...ift-more-power
    www.bimmerMILVs.com
    Coming soon: +1mm lift Exhaust cam N52 and N55

  17. #17
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    Click here to enlarge Originally Posted by CobraMarty Click here to enlarge
    But you can increase the valve lift +1mm and duration +2-3*, just not with a different cam.
    What tuning changes are necessary to take advantage of the MILV’s?
    www.ExoticPerspective.com: The Automotive Photography & Cinematography Community

  18. #18
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    I am not a tuner but from what I hear, there needs to be changes to the intake valve lift table.
    MILVs- +1mm Increase Intake Valve Lift for N52, N55, S55, N20 Engines
    http://www.bimmerboost.com/showthrea...ift-more-power
    www.bimmerMILVs.com
    Coming soon: +1mm lift Exhaust cam N52 and N55

  19. #19
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    1 out of 1 members liked this post. Yes Reputation No
    Click here to enlarge Originally Posted by CobraMarty Click here to enlarge
    This is from the N52 but as the parts are the same for the N55, I'm sure it applies to the N55 as well.
    This is stock valve lift vs. eccentric cam position

    https://www.audiboost.com/images/imp...L_HUBEX2-1.png


    https://www.audiboost.com/images/imp...KL_HUBEX-1.png
    I believe this table needs to be modified.
    MILVs- +1mm Increase Intake Valve Lift for N52, N55, S55, N20 Engines
    http://www.bimmerboost.com/showthrea...ift-more-power
    www.bimmerMILVs.com
    Coming soon: +1mm lift Exhaust cam N52 and N55

  20. #20
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    Click here to enlarge Originally Posted by CobraMarty Click here to enlarge
    I believe this table needs to be modified.
    Good info, thanks!
    www.ExoticPerspective.com: The Automotive Photography & Cinematography Community

  21. #21
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    This is no longer the record...

  22. #22
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    Well, he went to 1160 now.

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