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question on polly motor mounts

Discussion in 'OffRoad Design' started by UNCLE CRACKER, Dec 10, 2003.

  1. UNCLE CRACKER

    UNCLE CRACKER 1/2 ton status

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    I am getting ready to drop in a new motor in my truck. the motor is a 383 around 425hp and 425tq. my question is do you think it is better to run the polly mounts VS. the rubber? I have heard of people breaking tranny housings and I was wondering if the polly bushing help this problem? also do they make a big difference in the vibration you feel through the motor?
    thanks
     
  2. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    You definitely feel more vibration, that's just the nature of the beast, it's hard to have a stiffer mount without it being, well, stiffer.

    As for breakage, I'm a big fan of having the motor mounts at least as stiff as if not stiffer than the transfer case mounts so putting the HD poly mounts in would be a solid upgrade, at least in my opinion. This way the motor's not trying to torque against the t-case mounts. I'm also the guy that sells the stuff, but the reasons are sound so you know I'm not blowing smoke up your kiester.

    Hope this helps /forums/images/graemlins/thumb.gif
     
  3. UNCLE CRACKER

    UNCLE CRACKER 1/2 ton status

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    so in your opinion you think this helps against tranny case breakage
     
  4. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    Yup. The idea is the motor can't move as much so it can't twist against the t-case mounts and break the trans housing.
     
  5. UNCLE CRACKER

    UNCLE CRACKER 1/2 ton status

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    I guess you will be getting a call from me so i can order those mounts.
     
  6. Alaska Offroad

    Alaska Offroad Registered Member

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    Upgrading to ORD Poly bushings on my engine mounts is one of the best mods I have ever done, and I have done LOTS of "extreme" mods. IMHO the increase in vibes is barely noticable, and the benefits of engine controll is more than worth it.
     
  7. Blazinaire

    Blazinaire 1/2 ton status

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    Not to hijack a thread, but....
    Stephen, I sent you a PM a while ago regarding raised motor mounts. No answer so I figured I'd ask you here: Do you make your poly motor mounts in a raised version? I need 1/2-1'' to get the motor to clear my crossmember and to keep the mechanical fan off the front crossmember since I raised the t-case a bit. Also, what would pricing be on such an item?
     
  8. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    We don't have a raised version but I was able to build some spacers for my crewcab that worked pretty good. They raised the motor about 1/2". They're cut out of 3/4" plate. My turbo exhaust manifold was hitting the frame so I picked it up a little.
    I don't know if we're going to build anything to raise the motors, the spacer plate is the leading candidate right now.
     
  9. nvrenuf

    nvrenuf NONE shall pass! Premium Member

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    Just to be sure, does your motor mount kit come with both the frame and block brackets (I see the block bracket in your picture).

    Thanks!
     
  10. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    Yup, the comp style mounts come with both sides. Our HD daystar mounts are just the frame side and are a little cheaper.
     

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