Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum - View Single Post - This is the roll center, suspension pickup, and steering angle modification thread.

PoorMans180SX · 12-24-2009, 10:18 PM

95KA-turbo, that tension rod setup makes sense! Thanks! It looks like the Ikeya Formula arms, just more basic. But you could definitely adjust tension rod position if you made them yourself.

Also those knuckles look crazy similar to the Driftworks ones. Right down to the bushings, haha.

So here's a thought;

Say you have PSM knuckles, which already correct for bump steer. Then you get SPL tie rod ends, which have spacers to correct for bumpsteer. Third, you move the inner pivot point of the control arm up and install SPL's spacers to space the tie rod down even farther. Wouldn't this make the tie rods parallel to the new control arm location?

I know it's kind of a drastic amount of adjustment, but it should work.

I wanted to draw this in paint, but I can't find a good picture to do it with.

You can move the tension rods up a little bit, seeing as with decently high spring rates they don't move up and down a whole lot. Also, what about mounting the tension rod to the bottom of the control arm instead of the top?

And no one has any idea of where you actually want your roll center? To me, stock makes sense. All of my ideas won't really matter if it's ideal to have your roll center farther down than stock, as you won't need such drastic adjustment, hahaha.

BTW, thanks for all the input and compliments guys, I'm really enjoying this thread!

12-24-2009, 10:18 PM	#45
PoorMans180SX Zilvia.net Advertiser Join Date: Nov 2005 Location: Michigan Age: 36 Posts: 5,573 Trader Rating: (16)	95KA-turbo, that tension rod setup makes sense! Thanks! It looks like the Ikeya Formula arms, just more basic. But you could definitely adjust tension rod position if you made them yourself. Also those knuckles look crazy similar to the Driftworks ones. Right down to the bushings, haha. So here's a thought; Say you have PSM knuckles, which already correct for bump steer. Then you get SPL tie rod ends, which have spacers to correct for bumpsteer. Third, you move the inner pivot point of the control arm up and install SPL's spacers to space the tie rod down even farther. Wouldn't this make the tie rods parallel to the new control arm location? I know it's kind of a drastic amount of adjustment, but it should work. I wanted to draw this in paint, but I can't find a good picture to do it with. You can move the tension rods up a little bit, seeing as with decently high spring rates they don't move up and down a whole lot. Also, what about mounting the tension rod to the bottom of the control arm instead of the top? And no one has any idea of where you actually want your roll center? To me, stock makes sense. All of my ideas won't really matter if it's ideal to have your roll center farther down than stock, as you won't need such drastic adjustment, hahaha. BTW, thanks for all the input and compliments guys, I'm really enjoying this thread! __________________ Build: http://zilvia.net/f/showthread.php?t=643065 Friends don't let friends buy knock-offs.