drive shaft safety loop

Discussion in 'Race car chassis tech' started by moleary, Aug 3, 2008.

  1. moleary

    moleary GOD Bless America

    I am looking for the style that uses the trans mount holes / cross member to install but I can only find the universal type that required holes in the floor (jegs & summit).

    Does anyone know of a source or do I have to make my own?

    Thanks.
     
  2. SS-TRUCK

    SS-TRUCK Stage 1 X

    Mark look under BMR racing . They have the unit you are looking for . On our Camaro the torque arm we have has two driveshaft loops . I feel much better with two . Did you see Pinks last week when a shaft came out during the burnout and a part hit a camera man ?
     
  3. moleary

    moleary GOD Bless America

    That BMR unit is not excatly what I was trying to describe. The unit I have seen in the past I believe is a one piece that has a bracket that mounts with the tranny mount and extends a loop just past the first U-joints.

    Does anyone have a picturee of Duttweiler Driveshaft Loop Kit?
     
  4. whamo

    whamo 454 71 skylark custom

    I built mine, they used to be sold by Indian adventures and I believe Year one listed them. I did find another source for them. Im trying to find it.
     
  5. whamo

    whamo 454 71 skylark custom

    Attached Files:

  6. moleary

    moleary GOD Bless America

    Thanks Steve, that is it.
     
  7. 71GS455

    71GS455 Best Package Wins!

    I thought Metco made some too.
     
  8. Gold Skylark

    Gold Skylark Well-Known Member

    Try METCO they make some nice "loops".:Smarty:
     
  9. moleary

    moleary GOD Bless America

    made my own, fits like a glove!
     
  10. moleary

    moleary GOD Bless America

    Here is a pic of the one I fabb'd, installed.
     

    Attached Files:

  11. 71GS455

    71GS455 Best Package Wins!

    Does that give enough play for suspension travel up and down?
     
  12. SS-TRUCK

    SS-TRUCK Stage 1 X

    Mark what diameter loop did you use and does the bracket mount under the trans mount ? Also between the mount and crossmember ?
     
  13. moleary

    moleary GOD Bless America

    I actually bent that steel for the loop to 4.25" inside diameter (heat and a small coffee can as a jig) and it turned out sweet. The drive shaft is 3.10" OD

    It mounts between trans and trans mount only
     
  14. moleary

    moleary GOD Bless America

    So far, test driven shows no signs of any rub/contact. This pic was taken on Friday which was after several test runs. I was concerned at first that it was too tight, but, so far so good.
     
  15. poison heart

    poison heart Well-Known Member

    What's the diameter on those year one loops?

    And how fast do you have to be for these to be required on most tracks?
     
  16. moleary

    moleary GOD Bless America

    Drive-shaft loop
    If you have slicks, you must have a drive-shaft loop. If your car runs 12.99 or quicker, you will need a drive shaft loop, even if you are running street tires.
     
  17. SS-TRUCK

    SS-TRUCK Stage 1 X

    Mark thanks for that info .
    Poison Heart a loop is a major safety item in my opinion . I saw a car drop a front u-joint in the traps once . The drive shaft caught and the car pole vaulted end over end several times and finished on the roof which was flat with the dash . The driver was dead when we got to the wreck . A loop is very cheap insurance .
     
  18. 71GS455

    71GS455 Best Package Wins!

    Mark doesn't have a roof either (ok, it's made of fabric though).
     
  19. moleary

    moleary GOD Bless America


    I have a helmet for a couple of feet:laugh:
     
  20. moleary

    moleary GOD Bless America

    I took her out on a 2 hour road trip today with both street and high way duty. The loop needs a minor tweek- I have detected a very rare, unpredictable rub on the drive shaft:Dou: and it made the rub on two occasions for a milisecond-so, it is close! I thought it was almost like a detonation in the engine, but I knew it was not detonating. In the pic I first posted the paint is rubbed an itty bit on the drive shaft, and after todays road trip, it is actually just barely starting to wear the paint off.
     

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