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Thread: Millie antiroll bar

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  1. #51 Re: Millie antiroll bar 
    frequent forum contributor Club Member greyV8pete's Avatar
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    Interesting data Paul to add to the knowledge base. I had a good run over Exmoor yesterday in brilliant sunshine and am very happy with my new found 6degrees castor, so agreement there.

    For completeness of the record what wheels are you using? Rim size (Diameter, width and offset) and tyre size and make of tyre, as all these have a significant bearing on handling. Peter.
    Last edited by greyV8pete; 01-04-2019 at 06:34 AM. Reason: width added.
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  2. #52 Re: Millie antiroll bar 
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    Quote Originally Posted by greyV8pete View Post
    ... For completeness of the record what wheels are you using? Rim size (Diameter, width and offset) and tyre size and make of tyre, as all these have a significant bearing on handling. Peter.
    Wheels: Excite RO2: 15” Dia width 6.5” 35mm offset
    Tyres: Runway – Enduro-656: 195/65 R 15 91V
    Inflated 24psi
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  3. #53 Re: Millie antiroll bar 
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    Quote Originally Posted by cabrioman View Post
    Yep I may take a look at reverting to an ARB, but to be honest I tend to feel the problem is probably more related to the positioning of the ARB mount on the Cabrio chassis. Its design potentially allows the mount to pivot around the chassis leg, as the inner corner is sort of floating inside the chassis line.
    Although the compression strut scores on undulating ground it’s not so good on ruts. Given the same castor angle I’m inclining to the ARB being a better option for road use. Racing drivers and rally drivers being made of sterner stuff.

    Quote Originally Posted by cabrioman View Post
    I think the work you have already done to beef up the chassis will have already resolved any further problems regardless of whether you go with an ARB, split ARB or Compression Struts.
    Let’s hope so!

    Quote Originally Posted by cabrioman View Post
    There are probably hundreds of Sierras and Escorts out there using struts given the number of companies manufacturing strut kits and Ford themselves fitted struts to the Sierra on the Cosworth WRC cars, so I am sure it is all about the strength or lack of in the chassis and brackets.
    To be fair, the Sierra chassis does a better job of supporting the ARB or strut by mounting it on an angled face. Not really a practical option with the Marlin design. Also the struts were really designed for competition use where the suspension would be inspected after every race. I was also going to say a track is smooth but then the Cosworths were rallied too.

    Quote Originally Posted by cabrioman View Post
    I wait with interest to see what you end up with, I agree an ARB with adjustable Caster would be great, even if the adjustment was by spacers on the end shoulders.
    On a road car I can’t see much need for adjustment. Although there was a discernible difference it was not as significant as the road conditions. On the rally spec sheets the type of course made a difference but a road car has to be a jack of all surfaces.

    I’ve set up the struts to be accurately set at 6°. I’ve had a couple of beautifully sunny days and covered a few miles, enjoying routine driving. After a bit of experimenting, with apologies to local traffic, I have found self centring to be better than I had first thought. Even at speeds as low as 20mph she will return to a straight line. Low speed manoeuvring can seem a bit hard.

    Yesterday it was raining and I reverted to the faux by four. Its electric power steering was; I would have to say, every bit as good in a straight line. In fact I would only rate it better at low speed steering extremes.
    Paul
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  4. #54 Re: Millie antiroll bar 
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    Well I have “machined down the old ARB from the Estate and fitted it to the car. My cunning plan to use a v-belt take off from the back of my small lathe failed miserably because an intermediate belt kept slipping. Resorting to turning it by hand it took the best part of an afternoon to modify the ARB. The longer estate car ARB required about 20mm removing on one side. The other side, being bent, only required 7mm. Partly because I forgot to allow for the nearside mounting difference and partly due to difficulties measuring accurately I ended up with a n/s castor of 5.5° and o/s of 7°.

    Tool.jpg

    The tool

    n-s.jpgo-s.jpg

    The “turned” ARB

    n-s spacer.jpg

    The n/s required a substantial spacer to avoid the nut becoming thread bound.

    Good weather has allowed me to clock up a few miles and she is a pleasure to drive. The rubber mounted ARB does absorb shocks better than the struts. There is a discernible harshness to the ride over rough ground but not enough to bother me. I ought to find some quite road and check how it deals with squealing tyres but I can’t see that happening anytime soon.

    Using corrected measurements I have machined down the Sapphire ARB. I removed 14.5 and 11 from the o/s and n/s respectively. Measuring as previously described the lengths of the o/s arm is 305.5mm and the n/s 309mm.
    It will be a while before I can fit the Sapphire ARB. I’m not in any hurry because I don’t think I will be able to discern a difference.

    I thought this thread would be two posts long it’s turned into quite an epic. To think this all started with a perished steering rack boot. In hindsight I wish I had made these changes years ago but not by such a tortuous route.

    My thanks, to everyone who contributed; especially those that crawled under their cars to take measurements, photos and the like.
    Paul
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  5. #55 Re: Millie antiroll bar 
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    Glad to see you got it sorted out Paul.

    I have dropped you a PM on a related matter.

    John
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  6. #56 Re: Millie antiroll bar 
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    Well done Paul. Worth all the work in the end.
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  7. #57 Re: Millie antiroll bar 
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    Hi Paul, Another Cabrio found with the same condition. This car was for sale on Car and classic and when I contacted the owner he had no idea that anything was not correct. What he had heard was a scraping/ grinding sound coming from the NS. however nothing was found on a recent MOT test (the torn metal was under the powder coat ) and could only be found when I told the gentleman how to test . He was horrified at what he found and immediately removed the car from sale. This man is a classic car fan and has sent me photos of a heavy duty repair that has since been carried out. To my knowledge there are at least two more cars fitted with these struts one of them being the ex Lee Hunter car.
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  8. #58 Re: Millie antiroll bar 
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    The ex Simon Gregory Cabrio is advertised for sale on this website (which was the first car I found with the ARB mounts ripped out of the chassis.) Any prospective buyer should contact me to discuss the (repair) Danny 07976 836 374. thankyou.
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  9. #59 Re: Millie antiroll bar 
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    I should have stated in the above post that we have now found five Cabrio cars fitted wiith these compression struts with this serious damage, and Dave Clutterbucks car with the same damage but with the ARB fitted. Danny.
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  10. #60 Re: Millie antiroll bar 
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    Danny, thanks for the update. I believe that the MOC has saved lives with information. Just one more, very important, reason to be a member. I can’t thank you enough for drawing my attention to it.

    Even with an ARB fitted I will be checking this area regularly. I strongly recommend everyone else does too. The MOT is a good thing but it’s never going to check vehicle specific problems.
    Paul
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