STR Prep - Suspension and Alignment
Registered User
Joined: Jul 2007
Posts: 1,376
Likes: 2
but i have some questions on the spc upper offset ball joints, has anyone else noticed that they are taller then the oem ones?
isnt this almost the opposite of what a roll center adjuster is supposed to fix?
what effects on handling may have taken place by essentially spacing the front or rear upper ball joint?
what affect does this have on the rules>
isnt this almost the opposite of what a roll center adjuster is supposed to fix?
what effects on handling may have taken place by essentially spacing the front or rear upper ball joint?
what affect does this have on the rules>
So, because the SPC assemblies keep the ball joint - spindle relationship the same in the vertical direction, they are legal. The overall assembly dimensions don't dictate motion...just wheel clearance. Make sense?
Registered User
Joined: Sep 2009
Posts: 558
Likes: 24
From: littleton, CO
Originally Posted by rrthorne8' timestamp='1326500176' post='21315426
but i have some questions on the spc upper offset ball joints, has anyone else noticed that they are taller then the oem ones?
isnt this almost the opposite of what a roll center adjuster is supposed to fix?
what effects on handling may have taken place by essentially spacing the front or rear upper ball joint?
what affect does this have on the rules>
isnt this almost the opposite of what a roll center adjuster is supposed to fix?
what effects on handling may have taken place by essentially spacing the front or rear upper ball joint?
what affect does this have on the rules>
So, because the SPC assemblies keep the ball joint - spindle relationship the same in the vertical direction, they are legal. The overall assembly dimensions don't dictate motion...just wheel clearance. Make sense?
Registered User
Joined: Jul 2007
Posts: 1,376
Likes: 2
Ah, fair enough. I thought you were saying the overall dimension of the assembly was larger, not specifically the ball joint location. It's been a while since I've looked at an SPC camber joint. Anyone have a side-by-side comparison?
Registered User
Joined: Sep 2009
Posts: 558
Likes: 24
From: littleton, CO
Havent heard many trying the mugen hard rubber bushings and compliants... would love some proper detail on what these feel like.
Also still waiting for some pics on the spc offset and its possible roll center change. i dont have my originals any longer
Also still waiting for some pics on the spc offset and its possible roll center change. i dont have my originals any longer
Joined: Nov 2003
Posts: 2,246
Likes: 1
From: Atlanta
Rear toe curve: It's being touched on in the swaybar thread but I was thinking it should really be in here.
Rob, looking at that diagram you made, I had a question for you. Did you actually take measurements at the wheel through a range of motion or did you use conjecture when determining the relationship of the toe arm to the knuckle? If it's the latter, then I'm worried you may be on the wrong track. Don't forget that the knuckle moves fore and aft as limited by the two control arms being angled relative to the pick up point for the toe arm. This means that when the wheel droops, the knuckle gets closer to the toe arm and the opposite for compression.
There is one guy on here who has taken the measurements and his findings show that the curve is fairly linear. I'd love to attempt it for myself though. Perhaps the next time I change springs.
Rob, looking at that diagram you made, I had a question for you. Did you actually take measurements at the wheel through a range of motion or did you use conjecture when determining the relationship of the toe arm to the knuckle? If it's the latter, then I'm worried you may be on the wrong track. Don't forget that the knuckle moves fore and aft as limited by the two control arms being angled relative to the pick up point for the toe arm. This means that when the wheel droops, the knuckle gets closer to the toe arm and the opposite for compression.
There is one guy on here who has taken the measurements and his findings show that the curve is fairly linear. I'd love to attempt it for myself though. Perhaps the next time I change springs.
Registered User
Joined: Jul 2007
Posts: 1,376
Likes: 2
An S2ki member is trying to organize a group buy for PowerFlex bushings. Not sure whether it will be successful or not, but here's the thread: Suspension Forum - PowerFlex group buy.
Thread Starter
Joined: May 2004
Posts: 1,531
Likes: 3
From: Tucson
Rear toe curve: It's being touched on in the swaybar thread but I was thinking it should really be in here.
Rob, looking at that diagram you made, I had a question for you. Did you actually take measurements at the wheel through a range of motion or did you use conjecture when determining the relationship of the toe arm to the knuckle? If it's the latter, then I'm worried you may be on the wrong track. Don't forget that the knuckle moves fore and aft as limited by the two control arms being angled relative to the pick up point for the toe arm. This means that when the wheel droops, the knuckle gets closer to the toe arm and the opposite for compression.
There is one guy on here who has taken the measurements and his findings show that the curve is fairly linear. I'd love to attempt it for myself though. Perhaps the next time I change springs.
Rob, looking at that diagram you made, I had a question for you. Did you actually take measurements at the wheel through a range of motion or did you use conjecture when determining the relationship of the toe arm to the knuckle? If it's the latter, then I'm worried you may be on the wrong track. Don't forget that the knuckle moves fore and aft as limited by the two control arms being angled relative to the pick up point for the toe arm. This means that when the wheel droops, the knuckle gets closer to the toe arm and the opposite for compression.
There is one guy on here who has taken the measurements and his findings show that the curve is fairly linear. I'd love to attempt it for myself though. Perhaps the next time I change springs.
Joined: Nov 2003
Posts: 2,246
Likes: 1
From: Atlanta
You just have to wonder why after this car being used by enthusiasts for the last 11 years, there are no toe curves commonly available. I mean, it would be a great resource especially when looking at the differences between the AP1 and AP2. And why haven't any of the bump steer kit manufacturers used it to help sell their products?