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  #41  
Old 02-20-2010, 09:40 AM
Epstein Epstein is offline
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Don't forget that you can project/estimate setting that aren't there. That's why I took so much data.

Take these examples:
-A 12.50/8.75" setup would likely be vertical through 0 height and toe-in under compression based on how the plots keep moving right under compression as the traction arm gets longer.

-A 12.00/8.25 setup would likely be vertical through 0 heignt and toe-in under compression based on how the plots (the 2 pink ones) keep moving right under compression as the ruca gets shorter.

-The 12.25/8.50 plot is vertical through 0 height and toes in under compression.

Noticing the trend here? The stock arm lengths are 12.00/8.25. When making adjustments to the ruca, adding the same length to traction arm should keep the bumpsteer graph the same.

I was wondering if this is why SPC only sells the ruca and traction arm together. Probably.
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  #42  
Old 02-20-2010, 09:45 PM
cheeky14 cheeky14 is offline
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Quote:
Originally Posted by Epstein View Post
Don't forget that you can project/estimate setting that aren't there. That's why I took so much data.

Take these examples:
-A 12.50/8.75" setup would likely be vertical through 0 height and toe-in under compression based on how the plots keep moving right under compression as the traction arm gets longer.

-A 12.00/8.25 setup would likely be vertical through 0 heignt and toe-in under compression based on how the plots (the 2 pink ones) keep moving right under compression as the ruca gets shorter.

-The 12.25/8.50 plot is vertical through 0 height and toes in under compression.

Noticing the trend here? The stock arm lengths are 12.00/8.25. When making adjustments to the ruca, adding the same length to traction arm should keep the bumpsteer graph the same.

I was wondering if this is why SPC only sells the ruca and traction arm together. Probably.
props for the time taken to measure this out.
i was wondering if you referenced the eccentric camber adjuster at subframe as i think this can have an effect on the measurements; IMO

so in practice, i was thinking is to set your camber,traction & toe arms to the exact calculated lengths & adjust your toe & camber via the eccentrics in that way you get the calculated kinematic effect, right????
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  #43  
Old 02-22-2010, 04:05 PM
Tower240sx Tower240sx is offline
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good concept cheeky,

in that way an alignment would be much more OEMish in the approach, rather than trying to get to the ruca to adjust it for camber
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  #44  
Old 03-15-2010, 11:28 PM
Full-Race Geoff Full-Race Geoff is offline
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i dont know how i missed this thread EPSTEIN YOURE SICK!!! i was just about to setup my own toe gauge, this will help me get started THANK YOU
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  #45  
Old 03-16-2010, 01:35 PM
Full-Race Geoff Full-Race Geoff is offline
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epstein - what were your eccentric bolt positions? full in, full out, or dead center?
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  #46  
Old 03-16-2010, 04:12 PM
Colorado S14 Colorado S14 is offline
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Has anyone calculated the motion ratios for the S14 yet? Curious.....
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  #47  
Old 03-16-2010, 05:22 PM
Gigapunk Gigapunk is offline
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It's close enough to 1 on both the front and rear
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  #48  
Old 03-16-2010, 08:44 PM
cheeky14 cheeky14 is offline
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i agree on the motion ratio, its practically 1 to 1
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  #49  
Old 03-17-2010, 05:42 PM
Full-Race Geoff Full-Race Geoff is offline
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Quote:
Originally Posted by Epstein View Post
-The 12.25/8.50 plot is vertical through 0 height and toes in under compression.

Noticing the trend here? The stock arm lengths are 12.00/8.25. When making adjustments to the ruca, adding the same length to traction arm should keep the bumpsteer graph the same.
well this certainly disproves the ziptied "shorter traction rod theory"
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  #50  
Old 03-18-2010, 01:59 PM
Def Def is offline
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X2 on the eccentric bolt positions. I have mine full inboard to give slightly longer arm lengths. I think I was sitting at 12.625" on the ruca and 8.5" on the traction arm. I'll see how it feels compared to 12.625 and 8.0". Probably
better...
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