Wednesday, February 02, 2005

More rear suspension

Heres a few more pics from some time back....

I made the lower wishbones from 1" CDS. Welded in 1/2" thread top hats to use 1/2 rod ends on each point. I guess the ride will be firm, but its a light car, so theres no reason for too much roughness, even the shocks will have spherical bearings not rubber bushes...

The rod-ended front antiroll bar links I added are a lower grade of rod-end and show no wear after a half winter, salt, and atleast 5000miles...just spray WD40 on them twice a week.

I want complete control over every millimetre of suspension movement, bet 5mm or the most used part or the suspension - 5mm of the what, the 1.5-2 inchs usual movement on a modified car is bush slop, some of the time your riding the bushes, I want control over this slop.

The wishbones at the upright end are slighlty over widely spaced so to leave room for side spacers and washers between the rod end centre and the alloy link. Oversized so you can add in different thicknesses of washers between the upright and the side spacers that bolt the rod ends to the main bolt/upright...this way you can get 10 different thickness'es of washers and make sure the preload on the rod-ends is 100% ok.

So when the bottom main bolt and nut are done up - pinching it all together, the rod-ends are running 100% smooth and free. This actually requires some playing around with the washers as with fixed A arm the wishbone is solid, the two outer links for the upright need just the right packing so they don't bind when you pinch the whole bottom link together, hard to work to exact tolerances on piece work in the garage with a hammer and saw 8-) ....this is fiddly - worthwhile running the rod-ends without pretension as they will last better....leaving an excess for washers makes life easier....also the late and early Rotoflex uprights are different sizes...one has a wider base, so my wishbones cater for the wide one or the narrower one...as they are sized for the wide one...also the alloy links are the same size as the narrower link....






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