[AJG]

Assuming a standard coupe or cab body height, or lowered to CS height with the lower arms lying approx. parallel to the ground. Now, imagine maximum deviation of the suspension, say putting a wheel up over a highish kerb for instance. What is the maximum angle from the square that the lower arm/steering knuckle balljoint should see under worst circumstances? Assuming there is no damage to the balljoint pin and its not bent or loose in any way.

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[rhudeboye]

<img src="/forum/images/smilies/968/unsure.png" class="smilie" alt="" />



sorry, the funny title pulled me in. I'll be leaving now.

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[flash]

i did scale drawings of the suspension about 8 or 9 years ago. not sure where they are now though. i've moved twice since then.



the bottom line though is that the roll center goes below ground if you let the arms go up. i'll try to find the spec in my notes that showed me exactly how close to level it was, but as i remember, the arms still had to point down a bit. i actually had my car too low at one point, and while it "felt" like it was handling better, the stopwatch and speedo said i was actually scrubbing speed because my front roll center was below ground. you can see this all the time on cars that are set up by people who don't do the geometry work. it is generally indicated by increased front tire wear, and a battle with understeer. they typically try to compensate with a lot of negative camber. if you get the geometry right though, and eliminate the flex in the car so the geometry stays put, you don't have nearly as much of a problem.



this car is further cursed with a high rear roll center, which makes it even harder to get all of the geometry right, but that's another story for another oprah

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[AJG]

So would 968's lowered with aftermarket suspension set ups and indeed CS and Sport models with a 20mm body drop benefit from longer pins on the lower arm/knuckle joint interface to get the suspension intersection point above ground? Sorry for getting mildly technical, full unmitigated stupidity will be resumed ASAP, do not adjust your set.

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[flash]

20mm is not a problem at all. they designed the suspension to be able to handle that. you don't start getting into trouble until you get over 35mm

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