![\"UCA](\"http:\/\/www.rhoadescamaro.com\/build\/wp-content\/uploads\/2012\/09\/UCA_Shims.jpg\" "\\"UCA_Shims\\"")
<\/a><\/p>\nThe silver material is 1\/2″ thick, the darker stuff, 1\/4″.\u00a0 3\/4″ is about as far as you can safely go with the factory UCA fasteners.<\/p>\n
In building the shims and measuring how they affected camber, I found that for each 1\/8″ of shim, the car would gain about 1\/2 a degree of negative camber.\u00a0 Those values should be handy for any of the guys running stock-height spindles and factory pickup points.<\/p>\n
So together those two shims added 6\/8ths, or 3 degrees negative, taking it to a static 5.5 degrees negative camber.<\/p>\n
That number sounds really too far out there, and I certainly hope to find that’s the case.\u00a0 At this ride height, the outer pivot point of the upper control arm appears parallel, or perhaps just slightly above, the inner pivot point.\u00a0 This is a good thing, meaning the UCA will be pulling the top of the spindle “in”, in a manner that should produce favorable negative camber gain.\u00a0 However the lower control arm is definitely\u00a0past parallel, with the lower ball joint a little bit above the inner pivot point.\u00a0 This means the suspension is also pulling in the lower part of the spindle, a camber-robbing direction.<\/p>\n
One helpful element, is the lower control arm is effectively ~16″ long, whereas our SPC full-short arm is only ~8.5″.\u00a0 The smaller radius of the upper arm should product lateral (inward) movement more quickly compared to the lower arm, hopefully passing it somepoint soon, and generating some negative camber gain.\u00a0 One could do something like the Guldstrand Mod<\/a>\u00a0– it lowers the mounting point for the upper control arm, putting it in a steeper part of its travel, generating more camber gain.\u00a0 Unfortunately relocating pickup points is not only illegal in ST, it’s illegal in most forms of motorsport – at least those that don’t also allow for a complete tube frame chassis.<\/p>\n Since the upper control arm is in a beneficial part of its travel at this ride height (which I believe is just about on the bump stop in a stock car) – there may be a better way than shims.\u00a0 What if\u00a0one could shorter the upper arm even more?<\/p>\n The turnbuckle for camber adjustment on the SPC arm is 4″ long as delievered from the supplier.\u00a0 SPC does not appear to make a shorter turnbuckle-<\/p>\n So I made one, by cutting down each end of the turnbuckle by 1\/2″, and cutting down the threaded inserts by an equivalent amount.\u00a0 The result-<\/p>\n<\/a><\/p>\n