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Thread: B58 MILVs !!

  1. #1
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    B58 MILVs !!

    As time and engines move on and forward, so must everyone else.

    The B58 and S58 engines are a further evolution of the N52 and N55 engines.
    They have a similar Valvetronic system, just moved around and more compact.

    I will continue my research on this new and popular engine.
    I found and purchased a complete B58 cylinder head and additional Valvetronic supports to measure and experiment with.

    I am expecting to be able to do the same modification for this B58 engine as the MILVs modification on the N52, N55 and S55 engines.

    I expect an additional +1mm intake valve lift and +1-3* additional duration will be attainable.
    More power for the B58 engine.
    Tuners are starting to crack and get onboard with this engine.

    Pictures and more to come soon.

    B58 MILVs coming soon!!
    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 for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

  2. #2
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    These parts/supports are right on top and easier access. Changing them will be a much easier process.
    1 bolt, remove, replace, tighter, repeat x6 total. Replace valve cover.

    Click here to enlarge
    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 for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

  3. #3
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    Ha, the 4 sets that I ordered have to come from Germany.
    I'm sure they are scratching their heads in Germany, thinking- 'these parts never fail', and Why 4 sets?

    At least the head shipped.
    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 for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

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    2 out of 2 members liked this post. Yes Reputation No
    Christmas in August!!
    B58- Cylinder Head

    Click here to enlarge

    Click here to enlarge
    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 for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

  5. #5
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    Looking forward to your results!
    Burger Motorsports
    Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s!

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    Could we get more pics of that cylinder head? Like a lot more? Also impressions...

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    1 out of 1 members liked this post. Yes Reputation No
    Didn't sleep well so I got up early and took a pair of calipers to the B58 head that I have.

    Ports are BIG.
    B58 Intake is Oval shape- 35.7mm tall x 50mm wide. Not 'rectoval' like the N54/N55 at 29mm x 50mm.
    B58 Exhaust is also Oval- 29.2mm x 45.7mm wide. Not round like the N54/N55.

    B58 Valves measure- Intake 29.9-30.0mm, Exhaust 28.4mm.

    N52/N54/N55 Exhaust valves are all 28mm.
    N52 intake valves- 34.2mm, N54- 31.4mm, N55- 32mm.

    So just by 'looks', the B58 head is an improvement.
    Exhaust especially, Bigger ports and Bigger valves = more flow.
    Intake, maybe not so much, Bigger ports and smaller valves.
    IDK, but maybe that combination is better flowing than smaller ports and bigger valves. Or is there another reason or something else going on?

    The intake valves look to be moved out and right at the edge of the cylinder bore. It doesn't look like a bigger intake valve diameter would fit.

    Don't throw stones about the B58's 'smaller' intake valves just yet.

    Interesting is the different engines actual measurements.
    N52- 85mm bore x 88mm stroke = 2996cc and has the biggest intake valve 34.2mm. Cam is I-255*/E-263* durations.
    N54/55- 84mm bore x 89.6mm stroke = 2979cc and have 31.4mm and 32mm intake valves. Cams are N54- I-245*/E-261* and N55- I-255*/263* durations.
    B58- 82mm bore x 94.6mm stroke = 2998cc and has 30mm intake valves which looks to be the largest that would fit the 82mm bore. Cams to be determined.

    There is a correlation between cylinder bore diameter and intake valve size.

    Just some simple, basic engine generalities-
    Bigger bore (bigger intake valve) and shorter stroke make for a higher rev'ing engine. N52 engine.
    Smaller bore (smaller intake valve) and longer stroke makes for better intake filling and more torque and power across a broader rpm range. B58 engine.

    Without a doubt, BMW did their homework. The B58 engine looks very promising!!
    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 for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

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    Click here to enlarge Originally Posted by CobraMarty Click here to enlarge
    Without a doubt, BMW did their homework. The B58 engine looks very promising!!
    Get me a bunch of pics so I can turn this into an article.

    e-mail me them if you like and I'll take care of the rest!
    Three sets of brand new 991.2 3.0 headers for sale: Kline, Fabspeed, and Vektor Ceramic Coated

    IPD plenum for Porsche 991.2 3.0 for sale: $650

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    Some pics of the head-

    Click here to enlarge

    Click here to enlarge

    Click here to enlarge

    Click here to enlarge

    Click here to enlarge

    Click here to enlarge

    Click here to enlarge

    Click here to enlarge

    Click here to enlarge

    Click here to enlarge
    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 for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

  10. #10
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    So what are these pics and what do I like-

    Head- very compact latest design, valvetronic eccentric cam and mechanism moved around, No exhaust cam clamshell like Nxx engines, Heavy, must be thicker in all the right places

    Supports for Intake Valvetronic- up high right on top, easy access, easy removal and replacement, hint MILVs?

    HPFP- mounts up high right on top, easy access, driven by 3 lobed on exhaust cam, easy to upgrade/replace, hint Xtreme DI

    Exhaust ports and close up exhaust port- big oval

    Intake ports and close up intake port- big oval

    Combustion Chamber and close up- very compact

    Valvetronic Eccentric cam Motor- externally mounted, up front, easy access, has hex screw to rotate manually
    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 for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

  11. #11
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    You said you ordered four sets of heads.

    Are they all from the same style B58 motor?

    The Supra head obviously will be difference due to the casting but everything else should be the same, right?
    Three sets of brand new 991.2 3.0 headers for sale: Kline, Fabspeed, and Vektor Ceramic Coated

    IPD plenum for Porsche 991.2 3.0 for sale: $650

  12. #12
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    1 out of 1 members liked this post. Yes Reputation No
    1 head and 4 sets of the B58 Valvetronic suppports to experiment and make MILVs for the B58.

    2020 Supra head looks to be similar everywhere except the integrated 2 port exhaust manifold. I suspect that the 2020 BMW B58 will have the same integrated exhaust manifold.

    The only 2020 Supra head that I have seen is on Papadakis's B58 teardown video. Now if he would only send out that head and get it bench flowed.
    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 for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

  13. #13
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    BMW B58 cylinder head pictures, impressions, and potential for modified intake lift Valvetronic supports

    A ton of great information below from BimmerBoost member @CobraMarty who is known for his MILV's (Modified Intake Lift Valvetronic supports). He recently got a hold of a B58 cylinder head for development and took photos as well as provided his impressions.

    Click here to enlarge

    Enjoy:

    Didn't sleep well so I got up early and took a pair of calipers to the B58 head that I have.

    Ports are BIG.
    B58 Intake is Oval shape- 35.7mm tall x 50mm wide. Not 'rectoval' like the N54/N55 at 29mm x 50mm.
    B58 Exhaust is also Oval- 29.2mm x 45.7mm wide. Not round like the N54/N55.

    B58 Valves measure- Intake 29.9-30.0mm, Exhaust 28.4mm.

    N52/N54/N55 Exhaust valves are all 28mm.
    N52 intake valves- 34.2mm, N54- 31.4mm, N55- 32mm.

    So just by 'looks', the B58 head is an improvement.
    Exhaust especially, Bigger ports and Bigger valves = more flow.
    Intake, maybe not so much, Bigger ports and smaller valves.
    IDK, but maybe that combination is better flowing than smaller ports and bigger valves. Or is there another reason or something else going on?

    The intake valves look to be moved out and right at the edge of the cylinder bore. It doesn't look like a bigger intake valve diameter would fit.

    Don't throw stones about the B58's 'smaller' intake valves just yet.

    Interesting is the different engines actual measurements.

    N52- 85mm bore x 88mm stroke = 2996cc and has the biggest intake valve 34.2mm. Cam is I-255*/E-263* durations.

    N54/55- 84mm bore x 89.6mm stroke = 2979cc and have 31.4mm and 32mm intake valves. Cams are N54- I-245*/E-261* and N55- I-255*/263* durations.

    B58- 82mm bore x 94.6mm stroke = 2998cc and has 30mm intake valves which looks to be the largest that would fit the 82mm bore. Cams to be determined.

    There is a correlation between cylinder bore diameter and intake valve size.

    Just some simple, basic engine generalities-
    Bigger bore (bigger intake valve) and shorter stroke make for a higher rev'ing engine. N52 engine.

    Smaller bore (smaller intake valve) and longer stroke makes for better intake filling and more torque and power across a broader rpm range. B58 engine.

    Head- very compact latest design, valvetronic eccentric cam and mechanism moved around, No exhaust cam clamshell like Nxx engines, Heavy, must be thicker in all the right places

    Supports for Intake Valvetronic- up high right on top, easy access, easy removal and replacement, hint MILVs?

    HPFP- mounts up high right on top, easy access, driven by 3 lobed on exhaust cam, easy to upgrade/replace, hint Xtreme DI

    Exhaust ports and close up exhaust port- big oval

    Intake ports and close up intake port- big oval

    Combustion Chamber and close up- very compact

    Valvetronic Eccentric cam Motor- externally mounted, up front, easy access, has hex screw to rotate manually

    Without a doubt, BMW did their homework. The B58 engine looks very promising!!

    Click here to enlarge


    Click here to enlarge


    Click here to enlarge


    Click here to enlarge


    Click here to enlarge


    Click here to enlarge


    Click here to enlarge


    Click here to enlarge


    Click here to enlarge


    Click here to enlarge
    Three sets of brand new 991.2 3.0 headers for sale: Kline, Fabspeed, and Vektor Ceramic Coated

    IPD plenum for Porsche 991.2 3.0 for sale: $650

  14. #14
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    Very informative pictures and excellent comments.

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    Click here to enlarge Originally Posted by maxnix Click here to enlarge
    Very informative pictures and excellent comments.
    Best thread of recent memory.
    Three sets of brand new 991.2 3.0 headers for sale: Kline, Fabspeed, and Vektor Ceramic Coated

    IPD plenum for Porsche 991.2 3.0 for sale: $650

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    1 out of 1 members liked this post. Yes Reputation No
    Here's what 4 sets of new OEM BMW supports directly from Germany looks like.

    And I think that I will have my machinist machine in some 'MILVs' lettering on the top of the supports.

    Click here to enlarge
    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 for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

  17. #17
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    Click here to enlarge Originally Posted by CobraMarty Click here to enlarge
    Here's what 4 sets of new OEM BMW supports directly from Germany looks like.

    And I think that I will have my machinist machine in some 'MILVs' lettering on the top of the supports.

    Click here to enlarge
    No need for the “s”, if you are machining it on every piece, since that refers to a set of MILV components. Plus “MILV” will fit perfectly since it’s only 4 characters.
    www.ExoticPerspective.com: The Automotive Photography & Cinematography Community

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    Found my silver sharpie.

    Click here to enlarge
    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 for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

  19. #19
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    Yeah but it is MILVs

    Modified Intake Lift Valvetronic Support

    Not pleural.
    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 for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

  20. #20
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    Click here to enlarge Originally Posted by CobraMarty Click here to enlarge
    Yeah but it is MILVs

    Modified Intake Lift Valvetronic Support

    Not pleural.
    That makes sense, but why don’t you capitalize the S, then?
    www.ExoticPerspective.com: The Automotive Photography & Cinematography Community

  21. #21
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    IDK, play on letters?

    MILVS or MILVs?

    Should put it to a voting poll, ha. 'Forum Open Group Sourced'. FOGS, you heard it here first.

    Both make sense and have merits.
    Historically it was MILF which was singular or plural. It wasn't MILFs or MILFS. And why leave out the 'to'?

    Probably all capitals as it is probably the easiest for the machinist to do in the end. MILVS.
    OK I've casted my vote.
    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 for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

  22. #22
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    OK, my vote-

    Click here to enlarge
    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 for N52 and N55
    and soon- B58 MILVS with +1mm increase intake valve lift

  23. #23
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    Click here to enlarge Originally Posted by CobraMarty Click here to enlarge
    OK, my vote-

    Click here to enlarge
    Looks good. Whatever you decide, you should trademark it! This is a nice mod. Stealthy and simple!
    www.ExoticPerspective.com: The Automotive Photography & Cinematography Community

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    Yeah I just kept thinking MILFS

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    Who wouldn't love a good set of Milfs? Click here to enlarge

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