Help me understand...

[wellis77]

So after chatting with Vince (Mr.Quick) for a bit I realized one problem with the measurements I took which led me to finding a second problem with my UCA pivot inputs. First I wasn't measuring the height at the center of the pivot. I measured height at the front of the front bushing and the rear of the rear bushing (for both upper and lower control arms). What this means is the LCA vertical measurements are off 3/32" to 1/8" (too low for the front and too high for the rear) and the UCA vertical measurements are off 1/16" (too low in the front and too high in the rear). The more dramatic is the fore/aft of the UCA is WAY off. Now that I'm back in Switzerland I only have the incorrect UCA measurements, but it looks as though the front UCA should be in the range of -2.5" to -3.5" and the rear UCA should be in the range of 6.5" to 5.5". What I put into the software was -5.1 front and 4.6 rear. I have a feeling these two changes will have a dramatic impact on the results, especially the fore/aft of the UCA. I will still probably have to shorten the LCA by @ 16.7% (proportional to the UCA change) but these alone will likely have a big impact.



I have to figure out what I want to do for software so I can get these updates plugged in. Since I shortened my UCA I don't think I can fit the standard Viper air springs between them so I may have to go with something with a shorter stroke. In talking with Britt from Ride Tech, in order to not notice a difference in ride quality I need to keep my suspension travel at 5 inches. Based on my motion ratio, if I need to go to a shorter stroke shock, I'll have to move the control arm shock mount in about 3/4".

I sure am glad there are a lot of smart people here to help me get this all worked out. Thanks everybody, you have now idea how much I appreciate the help.