Took a couple minutes and pasted the pic from the manual into onsahpe. I started by just throwing on a few lines that are the given track to establish scale.
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lines.JPG [ 15.11 KiB | Viewed 7142 times ]
Then pasted in the pic eyeballing to my lines
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pic pasted.JPG [ 65.71 KiB | Viewed 7142 times ]
Then eyeballed points at the suspension pivots and put lines through them....instant center 295.36mm
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308 front as drawn.JPG [ 59.12 KiB | Viewed 7142 times ]
With a few dimensions added to fix the contact patch, a-arm lengths, upright and chassis a-arm mount distances and 1 to set the lower a-arm mount to ground (203.12 is where it came out in the manual drawing), I lowered the car 1" to 178mm
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308 front lowered 1inch.JPG [ 59.52 KiB | Viewed 7142 times ]
the instant center changes from 295 to 80mm....that does not seem ideal. ut I still need to mirror it to see what the roll center is doing. The lower chassis a-arm mounts are bolt-on and not quite long enough to get the camber up to 3 degrees (I'm told) so since I probably need to make new mounts anyway I'll spend a little (as in many hours
) figuring out exactly where the car is set now and fiddling with finding a good location for the lower a-arm mount height....which will no doubt mess up the bump steer.....its always something.
Edit...roll center changed from 78.6 to 45mm not as bad I thought.
Edit 2 - I typo'd the 1 inch drop in CAD....roll center drops from 78.6 to 26.4 for a 1 inch ride height drop