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Thread: CR500 to ZZS

  1. #21
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    Quote Originally Posted by Black Hole View Post
    Attachment 16657 Attachment 16660 Attachment 16661 Attachment 16662

    So the question is what is the best tactic to solve this problem. I can try and bend the wing stay (cold or heated), I did a test try a while ago and it seems pretty stiff.

    I could move the wing to outboard as it is not centered and I think that would work. i would have to deal with the holes in the fiberglass.

    The final solution would be to buy the new stays as they note on the Caterham Parts website that they are for ZZS/R tires. I suspect I would have a hole alignment issue with the wing holes so I would probably be just as easy to move the wing on the existing stay.
    Jay,

    The rear of the wing looks to have adequate clearance. Why not simply place a spacer between the top of the wing and the upper stay, and replace the mounting bolts with a longer length as/if needed.
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  2. #22
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    Quote Originally Posted by xcarguy View Post
    Jay,

    The rear of the wing looks to have adequate clearance. Why not simply place a spacer between the top of the wing and the upper stay, and replace the mounting bolts with a longer length as/if needed.
    Thanks, I will likely try that. There may be a bolt alignment issue with the stays as the wing moves to a "larger diameter"
    Jay

  3. #23
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    Quote Originally Posted by Black Hole View Post
    Thanks, I will likely try that. There may be a bolt alignment issue with the stays as the wing moves to a "larger diameter"
    if you only move the top of the wing, alignment issue should be minimal to none. Worth a shot.
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  4. #24
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    Quote Originally Posted by Black Hole View Post
    Thanks, I will likely try that. There may be a bolt alignment issue with the stays as the wing moves to a "larger diameter"
    If you take this approach then:

    1) please shorten the ends of the bolts shown in the photo in post #16. Having protrusions pointing towards the tires like that is slightly alarming even though they should not hit the tire.
    2) consider allowances for sidewall deformation on hard cornering.
    Mike
    2010 Caterham CSR with Cosworth 2.3 Duratec
    2018 Caterham 420R with 2L Duratec 210hp at Donington UK
    1975 BMW CSL Group 4 (restoration - engine and dry sump install time)
    1977 Holden Torana "A9X" (awaiting restoration)
    1985 Holden Commodore SS Group A
    1985 Holden Commodore Group A
    1982 Ferrari 400i
    1965 Ford Mustang Fastback "Holman Moody"
    1992 Ford Escort RS Cosworth WRC (fettling after long period of storage)
    1990 Range Rover 2 door Classic
    and another project car coming....

  5. #25
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    Quote Originally Posted by Croc View Post
    If you take this approach then:

    1) please shorten the ends of the bolts shown in the photo in post #16. Having protrusions pointing towards the tires like that is slightly alarming even though they should not hit the tire.
    2) consider allowances for sidewall deformation on hard cornering.
    To affirm Cros’s comments, this is ideally what you want to end up with regarding bolt length/protrusion (see photo). While my car is not a Cat, the mounting technique is the same. Also, thin lock nuts aide in providing additional bolt-to-tire clearance if needed....see McMaster-Carr.

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    Last edited by xcarguy; 03-08-2020 at 11:04 AM.
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  6. #26
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    J.
    IIRC I ordered from ec fiberglass before
    Shipping wasnít bad. But I ordered a dozen to have spares on hand (which have come in handy for other projects)

    Ps: would you still like To try out my Tillett for size?

    P.

  7. #27
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    Quote Originally Posted by xcarguy View Post
    if you only move the top of the wing, alignment issue should be minimal to none. Worth a shot.
    I put some spacers in and alignment does become an issue pretty quickly, I could get the bolts in by flexing the wing, but it essentially straightened out the wing between the stays drawing it closer to the tire. The spacers helped but I still have essentially zero gap (you can't really measure with a feeler gauge between the wing and tire as the tire is not rigid). As Croc noted, with distortion I expect it will rub.

    Likely headed towards the bighead route as moving the wing outboard should fix the problem. And then I won't have to worry about the long bolts (though they had a large amount of clearance to the old tires, the new tires are listed by Avon as nominally 1.39" larger in diameter and that eats up the margin for error!)
    Jay

  8. #28
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    Quote Originally Posted by wemtd View Post
    J.
    IIRC I ordered from ec fiberglass before
    Shipping wasn’t bad. But I ordered a dozen to have spares on hand (which have come in handy for other projects)

    Ps: would you still like To try out my Tillett for size?

    P.
    Did you get it installed? Yes I would like to try it out
    Jay

  9. #29
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    Not yet

  10. #30
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    Quote Originally Posted by wemtd View Post
    Not yet
    Are you around next Saturday. I assume you are working Sunday.
    Jay

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