Four Link Rear - to Triangulate or not to Triangulate? That is the Question. - Page 4
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  1. #31
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    I've thought about this quite a lot, and I'm going for the parallel 4 link + Panhard rod.
    Depending where I put the forward crossmember, I have 450mm - 500mm between centres on the links.
    Is there a huge advantage in going for 500mm over 450?
    I've seen lots of set ups that look shorter than this.

    Also I plan to have the links on converging radii to meet around where the engine / gearbox meet to give a bit of anti squat



  7. #35
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    The finished article.
    I decided to use a track locator instead of a panhard rod.




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    Looks close to the diff or is it the camera angle??
    I'm not the best welder in the world.... but I'm in the top 5!

  9. #37
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    It moves with the diff, so no problem.
    You still would be better off with a panhard rod though.

  10. #38
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    Quote Originally Posted by cc41memorylane View Post
    Looks close to the diff or is it the camera angle??
    It I pretty close, but clears on travel
    Last edited by Ian34; 13-10-2015 at 10:45.

  11. #39
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    Quote Originally Posted by blackpopracing View Post
    It moves with the diff, so no problem.
    You still would be better off with a panhard rod though.
    Why is that?

    I went for the track locator for a number of reasons, including that I have seen them on Wisbech chassis, I was told Dan Donati's car has one, and I thought they are reasonably common in drag racing circles.
    I could change to a panhard rodif it is significantly better, just pa ckaging is a little more tricky

  12. #40
    Administrator blackpopracing's Avatar
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    As stated a long way back in this thread the diagonal link needs to shrink/stretch on body roll. It obviously cannot do this so 2 things can happen.
    1, body will not roll as much giving an effective anti roll bar.
    2, all the forces of stopping the body roll in cornering will be placed on the bolt/bracket of the diagonal link - imagine the leverage of the weight of your car x inertia in cornering on those items - they will eventually fail.

    Panhard rod will not do any of those things - it will give smoother cornering roll, full suspension travel without stress and better body location.

    As a test, try jacking one side of your axle up only, watch how quickly the other side follows (as if you had jacked it under the diff). Now undo the track locator & repeat, see how only one side raises (side being jacked) this is how your suspension should work.

    Just because a few cars have diagonal links fitted does not mean they are the best option. In drag racing they are better than a panhard rod but drag cars do not need to corner. Plenty of show winning cars out there with some pretty awful suspension set-ups.
    Last edited by blackpopracing; 13-10-2015 at 12:15. Reason: spelling

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