Wishbones - through the ages

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anthonym
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Wishbones - through the ages

How are these different, aside from being different shapes (aero/not aero etc)  they all look like the same design to me:

I have to choose whether to modify the middle one in a visit to Arch

they are 1990 BDR (see next post #2), 1987 BDR,  2000 KR500

Tazio
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Just for completeness, mines the 1990 BDR, it's non standard, when I originally rebuilt it, it was identical as Anthonys 1987 car, but as I had an issue with the camber on one wheel, whih couldn't be adjusted out,  I replaced the top wishbones and put a normal arb on too.

anthonym
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for the record:

I have elected to keep it as it is, because I never do track days etc and at the end of the day I just like it. 

I am going to fit the rear CC disk brakes update and keep the drums for museum use.

thanks to Tazio for invaluable informative discussion :-)

anthony

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Were I in your position Anthony i would do the same as Tazio and keep the original front parts in the same museum as the original rear drums.

 

anthonym
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Why? I've driven her all over Europe as she is and was happy. My only reason for changing the drums to disks is ease of foreign servicing. If I want more modern I can drive my K series.

Me feeling is she is of her time and that's where I want to keep her. If she was my only 7 I would have a different view.

What are the technical arguments? (I am unlikely to change, but very interested ) , anthony

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main argument would be to ensure you can align all the wheels in the correct direction.......

...unless you've checked yours and know its spot on ?

It's a little like bump steer, most seem to think there car is fine until they drive a car that's been corrected

no different to your argument for the disc conversion really, not sure how much foreign servicing the rear drums on a low mileage BDR are likely to need..... 

 

anthonym
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I haven't driven the car since about 2004. Or 3. Far as I know the wheels were aligned ok back then. Meaning I wasn't told they weren't when it was rebuilt in 2002. Ish.

She was corrected for bump steer because I complained bitterly about it. I don't recall any uneven tyre wear. 

drums, I just don't fancy any risk of adjustment being required or leaking slave cylinders. Based on memories of having them in the early80s or late 70s. If I were not intending to do great distances from base etc I'd not bother. 
 

Having looked at my pic of three wishbones I want to keep her distinctiveness. Drums are not so obvious and in their case it is what was the official CC upgrade of the time. I just never fitted them back then.

Why is there a possibility of not being able to align the  wheels?

anthony

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As Tazio experienced recently there is no camber adjustment and his was a way out - negative one side and positive the other - down to the manufacturing tolerance of the OE top links.....

 

anthonym
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Might top rose joints address that?

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You would need to butcher / modify the top link to fit those ........

Tazio has chapter and verse on these as he has just gone through the process, his solution is the win / win safe to drive and easy to revert to OE spec.

anthonym
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It can be reverted? What is the chassis mod? (Tazio?)