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  1. #1
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    Re: Tarmac Rally Stratos Build begins

    john, The standard cables are about 300mm too short for me, in the process of getting some new ones made up now

    thanks Ade, safety first!

    Going to stick with the triumph/spitfire rack, the one in the car is absolutely stuffed, from what I've read, sounds like a quick rack is the go? bit pricey but worth it?

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    SEC Member ChrisCar6's Avatar
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    Re: Tarmac Rally Stratos Build begins

    The 2.5 turn Triumph rack from Rimmer is perfect, but the manufacturer says not for motorsport use, which makes me uncomfortable, but I haven't found anything other than a custom built alternative.

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    Re: Tarmac Rally Stratos Build begins

    Interesting, what failure are they worried about? is it the casting or the actually rack/pinion? as you say not a whole lot of options for a front mount rack, and I've already built the column based around that rack, Has anyway had the standard ones fail?

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    Re: Tarmac Rally Stratos Build begins

    Don't know what the exact concern is - maybe back-covering? Here's the letter they sent out to all who had bought one.
    Attached Files Attached Files

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    Re: Tarmac Rally Stratos Build begins

    Thanks for the info Chris, I sent them an email about it and got this response.

    we don't have common failures of the steering rack, we just don't want to 'guarantee' the stresses of some motorsports are suitable for these racks, sorry.

    Sounds like ass covering to me!
    Last edited by ByrneEngineering; 02-05-2020 at 11:32.

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    Re: Tarmac Rally Stratos Build begins

    What about using GP4 twin shear type steering arms rather than a high ratio rack? I see a number of advantages; adjustability of ratio range, use of female rod ends in place of MGB tre and further scope for adjusting/fine tuning bumpsteer.

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    SEC Member ChrisCar6's Avatar
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    Re: Tarmac Rally Stratos Build begins

    Quote Originally Posted by colin artus View Post
    What about using GP4 twin shear type steering arms rather than a high ratio rack? I see a number of advantages; adjustability of ratio range, use of female rod ends in place of MGB tre and further scope for adjusting/fine tuning bumpsteer.
    Still would use the herald rack and track rods Colin - there must be an increase in forces from a Triumph herald on skinny tyres to a V6 Stratos on wide tyres?

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