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Thread: Hybrid Engine Mounts, looking for feedback

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    Ninja Messiah kung fu jesus's Avatar
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    Hybrid Engine Mounts, looking for feedback

    I most definitely need engine mounts soon. I ran Mazda competition mounts on my NA, no issues. I am considering the hybrid mounts 949 Racing sells.

    This is my DD and my HPDE sled. I don’t want a lot of NVH. Does anyone have anecdotal experience? I am reading conflicting reports, but not sure if they are the same mounts.

    Thanks for the feedback!

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    4,000 rpm - entering the fun zone Greasemonkey2000's Avatar
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    According to post #65, http://mazdaroadster.net/showthread....l=1#post196157 , Hammerhead went with them but I don't think his roadster has seen road time yet.

    Some outside feedback:
    https://www.miataturbo.net/engine-pe...-mounts-93692/
    '01 NB2 aka MisF1re: http://mazdaroadster.net/showthread....218#post207218
    '97 M aka Warbird, gone but not forgotten: http://mazdaroadster.net/showthread....B&goto=newpost
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    Ninja Messiah kung fu jesus's Avatar
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    I ordered them. Worse case, I won’t like them and I just need to replace one with a regular Mazdacomp mount, sell the other.

    80% less flop, converted to forward movement is a strong argument.

  5. #4
    3,000 rpm - starting to feel the power Ihatecars's Avatar
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    I've been on Hybrid mounts for over a year now.

    They're totally fine. You'll notice a major difference at first. Lots of NVH and what not. After a few months everything has settled down significantly. There's still a noticeable increase in NVH, but nothing too terrible. Shifting feel was improved, but nothing incredibly noticeable.

    Solid 8/10 modification. I'm satisfied with mine.

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    Ninja Messiah kung fu jesus's Avatar
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    Thanks!

    I expect some initial harshness. Right now I’m blowing some 3rd gear shifts at the track, no bueno. A more precise shift would be great, just don’t need to feel like I’m riding in a rock tumbler.

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    4,000 rpm - entering the fun zone Greasemonkey2000's Avatar
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    I think for what you want they should fit the bill. I personally am not worried too much about NVH and having had 70d AWR urethane motor mounts I am going to go with Blackbird Fabworx drop mounts.
    '01 NB2 aka MisF1re: http://mazdaroadster.net/showthread....218#post207218
    '97 M aka Warbird, gone but not forgotten: http://mazdaroadster.net/showthread....B&goto=newpost
    Instagram: @greasemonkey2000

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    Admin / Pit Boss / Miataholic Phatmiata's Avatar
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    Curious to know how any of these mounts are measured, is it by Density of the materials used, Shore "A" Hardness, Compression tests, or what?

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    4,000 rpm - entering the fun zone Greasemonkey2000's Avatar
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    Looks like the Shore durometer scale is universal...here it is for rubber:
    http://mykin.com/rubber-hardness-chart

    And urethane:
    https://psiurethanes.com/soft-vs-hard-durometers/


    The Shore hardness test/scale explained:
    https://www.artmolds.com/shore-hardness/

    https://en.m.wikipedia.org/wiki/Shore_durometer


    I always wondered about this but never looked into it till now, good information.

    @Phatmiata: My best guess would be D but could be A....

    Edit: According to Corksport when talking about bushings it is almost always scale A:
    http://corksport.com/blog/why-durometer-doesnt-matter/

    It also goes onto say that the number is less important and size/surface area is more relevant.
    Last edited by Greasemonkey2000; 05-14-2018 at 10:53 AM.

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    2,000 rpm - light wheelspin, no bog here! turboedpickup's Avatar
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    70D is pretty damned stiff. Delrin is ~85D. But these units have weird conversions. For rule of thumb, compression modulus at 60D is approximately 2X that of 95A polymers. So essentially a 60D part should feel twice as hard as a 95A material.

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    Ninja Messiah kung fu jesus's Avatar
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    The rubber Mazdacomp mounts are 75D, FWIW.

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    2,000 rpm - light wheelspin, no bog here! turboedpickup's Avatar
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