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Thread: Pros and Cons of Polyurethane Mounts

  1. #1
    Negative Reputation Domestic Engineer Howieau's Avatar
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    Default Pros and Cons of Polyurethane Mounts

    Hey,

    I did a search on engine mounts and polyurethane but couldn't dig up the info I was chasing. I'm in the market for some new engine mounts to go with my engine rebuild. The car will be a daily driver/track car - im not sure if thatll affect which mount stiffness to go with? Anyhow I had my eyes on some polyurethane mounts but have been getting some mixed info about them, ie. They dont last long apparently?

    So what are the pros and cons of polyurethane mounts?

    Thanks in advance
    "There is a better way to do it, find it" -Thomas Edison

  2. #2
    Olde ****** Automotive Encyclopaedia ToDa30/4's Avatar
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    Default Re: Pros and Cons of Polyurethane Mounts

    pros more torque to the wheels, less engine movement in a gt4 replacing front & rear only

    cons some engine vibration ,cost but WILL last longer than rubber ones

    the speed source ones are great , the kit has all u need & easy to fit
    Project ST215W 300 AWKW Killerwagg'ss .staring in the garage .soon
    ST185R 385 AWKW now SOLD ..Daily '89 Eunos Roadster.
    Project '75 KE30 37.4 RwKw PIMPster. doing it for Angela RIP 1964 - 2011

  3. #3
    the hybrid Backyard Mechanic Fish's Avatar
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    Default Re: Pros and Cons of Polyurethane Mounts

    Very little give and fail easily if mis treated IE jacking car on motor with out undoing some bolts.

    I have torn 3 engine mounts.

    there also lighter too.

  4. #4
    ST185 GrpA #135 Automotive Encyclopaedia Toobs's Avatar
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    Default Re: Pros and Cons of Polyurethane Mounts

    I'm using the speedsource mounts on my GrpA and I highly doubt you could break them from any amount of abuse.
    The speedsource mounts are solid so they shouldn't tear like some of the other poly mounts around.

    Pro's
    -Durability
    -Cost (yes cheaper than factory)
    -Less engine movement

    Con's
    -Increased vibration

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