motor mounts

Discussion in '96-04 - 2V Specific' started by philly101, Dec 26, 2014.

  1. philly101

    philly101 Member

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    is there an benefit runing solid eng mounts over polyurethane an if so whats the pros an cons of both
     
  2. Pitbull_SN95

    Pitbull_SN95 Active Member

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    If it's a track car, go for the solids. The solids are streetable ranging from teeth scattering to no vibrating but it can make pulling a transmission a pita. I'd just go with some nice poly mounts. There's not really a downside to either, or one's better than the other. Just make sure you do your research on which poly mounts you go with. I've heard a few things about them not fitting correctly in the aftermarket K members.
     
  3. Orange 94

    Orange 94 Moderator Staff SN95 Supporter

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    Generally,

    Solids; full out racecar.
    Poly; everything else.
     
  4. mcglsr2

    mcglsr2 Well-Known Member SN95 Supporter

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    When your engine provides drive through the driveline (i.e. when you step on the gas pedal), it creates a twisting motion (torque). Since your driveline has friction and mass and all that stuff, it doesn't want to twist right away. So the engine ends up twisting some instead until the driveline gets going. The softer the engine mount, the more the engine twisting will happen (if you've seen youtube vids of engines as people revved them or dyno'd them, and the engine moved a lot... => softer engine mounts). This is power being used to twist your motor, rather than twist your driveline. Wasted power.

    If the engine mounts were solid, they would not allow twisting at all, and thus the twisting motion is forced to the driveline. Much less loss of power. But an engine vibrates. If the mounts are solid, this vibration can be transmitted to the car, increasing NVH dramatically, whereas softer mounts would eat up the vibration and smooth it out before the passengers felt it. In a racecar, no ones cares about NVH because racecar. In any other car, people tend to care.

    How much power is really wasted with the twisting? Probably negligible. For a racecar, where every bit counts, then it's important. For every other car, it's usually not worth the NVH it brings with it, poly mounts are a much better option.

    So, this is a long way to say "What Orange 94 said."
     
  5. 96blak54

    96blak54 Legend

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    Solid mounts ftw.

    Nothing like getting your shake on when the key turns over.
     
  6. MustangChris

    MustangChris Legend Retired Staff SN95 Supporter

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    I went solids. You can feel it in the butt when you're cruising, which is nice... ;)

    I suggest solid if you're on a budget and OEM if you're not. Polys give minimal "performance" bump unless you're pushing some high TQ numbers (500+)
     
  7. BOOOSTD

    BOOOSTD Active Member

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    I personally don't like the solid mount for the street because you hear and feel every vibration. If it was a pure drag then absolutely.

    So my solution is a poly for the street and then I have a custom tie-down for the track which replicates a solid mount. My tie-down connects from the drivers side frame rail to the power steering pump bracket which elimantes the engine twist.
     
  8. philly101

    philly101 Member

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    Thxs for all the info guys looks like im goin to go with the soft stuff it will be my track car in like another 2 years haa need to ride good for my bby
     
  9. JerZeyStangz

    JerZeyStangz Well-Known Member

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    I have energy suspension poly red motor mounts, brand new out the box installed on my mustang gave absolutely no vibration. Lesser brands gave initial vibration but when broken in went away after a while. I am glad I did them because it helped the car a bit in take off acceleration by SOTP feel, probably gained 1hp back but this is speculation lol.
     
  10. kb1982

    kb1982 Active Member

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    I have the maximun motorsports solid mounts in my 95. It really didnt seem to effect vibration much, but then again im not running a rowdy cam that has a 600 rpm swing at idle. The MM mounts keep the motor at stock height also, so thats a plus. If your going to end up running rear control arms that have solid spherical heim joints in them, then i dont think solid motor mounts would bother a person too much. These are the ones I have, and are pretty nice pieces.
    [​IMG]
     
  11. mineralgreygt

    mineralgreygt Member

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    I'm running solids with stock cams. Vibrations are not noticeable until you drop the hammer and even then its really not that bad, i drive a r/t dodge magnum as a DD and that's a cushy ride so i have skme type of comparison and again vibrations really aren't that bad, you get to a point you dont notice it anymore, when i tell people I have solids they're surprised. These engines are very well balanced, my favorite part is when you chuck a rev you feel the whole car twist which is kind of cool.
     
  12. JerZeyStangz

    JerZeyStangz Well-Known Member

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    Reminds you of that old 60's Detroit muscle.
     
  13. 03DSGGT

    03DSGGT SN95 Supporting Member

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    I have an AJE K member that uses the universal motor mount setup, and the bushings that come in it are the same part number bushings for the steering rack. The bushings that came with the K member are poly, and I switched them out to delrin, which is basically between poly mounts and solid mounts. I noticed a slight vibration, but its just sitting at idle with the large cams...
     
  14. Ineedav8

    Ineedav8 Active Member

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    I have a set of upr solids I tend to use on my 96 stage 3 cams and all can't wait for it honestly
     
  15. punched281

    punched281 Active Member

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    Ive got solids and its a dammed motor. Everything in my car rattle now. I wished I wouldn't have and you can't really feel a difference.

    I would go with stiff, but not solid.
     
  16. MustangChris

    MustangChris Legend Retired Staff SN95 Supporter

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    nice... is the power steering pump strong enough to withstand that kinda force/abuse?

    dat butt dyno is the most accurate, you know ;) lol.

    dang, everyone here hasnt noticed much vibration from the solid mounts.... ... i must just have a sensitive rear end.
     
  17. JerZeyStangz

    JerZeyStangz Well-Known Member

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    I'm never out of calibration..................................................................................................................................:D
     
  18. punched281

    punched281 Active Member

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    Mine vidbrate like crazy, especially when I lopin at idle. All my panels rattle now.

    Sometime my girls comments on the vibration too..........
     
  19. mineralgreygt

    mineralgreygt Member

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    That's cuz they like ooooooooooooooooo
     
  20. 98snakehorse

    98snakehorse Well-Known Member

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    This movie is kinda dumb but this thread reminded me of it lol....

    [video=youtube_share;r8Ps9310ih8]http://youtu.be/r8Ps9310ih8[/video]