Bikenuts wrote:1.5Kgs is about a kilo less than a standard 1100/1300 upright - so a good reduction, and there should be a saving by swapping to rose joints too. My main problem is I have the old style of rockers with chevete ball joints so I need to decide how to modify them to take a rose joint without putting back all the weight saved by the alloy upright. I'm not too worried about weight on the rest of the car - I need to lose a few stone before I think about reducing that.
Matt
Well basically I still have SSC rockers , albeit tubular . The SSC Metro end was cut off then a 50mm (approx'ly) flat circular piece of steel had a 5/8 ths hole drilled in the centre . Behind this was welded a threaded insert to take a rodend(rose!) -- Looking rather like a steel top-hat . That top-hat was then welded to the cut off ' rocker ' . I'm competing and the rodends have never failed , only the ones hitting a tree
Having said that , as the rodend isn't designed to take a load across the shank and I could have bought 1/2 inch rodends but with 5/8 ths shank (but chose 1/2 x 1/2
) -- It might be wise to use the 1/2 inch rodend with 5/8 ths shank . Whatever you do , don't buy cheap rodends . Buy National rodends with 16000 lbs breaking point or more . They will be about 25 to 30 quid a piece though
I think the only rodends that ought to be 5/8 ths shank , are the two supporting the upright . All others take load in a linear direction ie. on the wishbone and steering rod ends
Pic' shows the circular steel plus insert in situ' with it's 1/2 inch rodend . The cranked steering arms are shown earlier in this TOPIC -- cut/shut (from Rally Design standard arms @ £45 a pair)