robrob, Any thoughts on 650/550 vs 650/600 on a 235/255 stagger? (I already have a pair of 650's)

 

if "brocken" streets drive is out of your scope - stiffer spring all the way.

if, like me, you do spirited driving on public "brocken" roads this will create problems.

what i eventually works for me is Eibach bars boths on stiff and V3 bump set to 3 (lower adjuster). rebound is not very stiff - only 1-2 clicks stiffer than KW recommends.
this setup is quite good on a road and body roll and directions changes are OK.

with Eibachs on soft and/or bump on 4-5 the body roll was too much for my liking and direction changes were slow.

but onece again - if your only focus is track with more or less smooth surface - stffer springs will make the car much more sharp and "go kart" like.

 

I don't have first hand experience with that setup but theory would say less tire up front so less spring. I'd suggest trying the 650/600 with those tire sizes.

 

I have 650/550 and bottoming out, running out of shock travel. Will try to raise car some to see if it helps before going to stiffer springs. I am at 12.5 from center of wheel to fender lip right now.

 

You're running too low. Billj747 recommends 12.6 front and 13.2 rear as minimum. Hitting the bump stops will cause strange, hard to diagnose handling problems.

 

if you want to run that low RCA's might help?

 

Roll Control Adjusters won't keep you off the KWV3's bump stops.

Edit: I'm wrong, see next two posts.

 

are you sure? I had to raise my car a lot in front after installing front rca's

Maybe I'm just getting confused on how RCA's work

 

You're right, I never thought about it until now but roll center adjusters do lower the car by raising the hub, the lower control arm and shocks aren't affected so you will gain some bump stop relief by installing RCAs.

 

If they raise hubs (wheel) up which in turn makes car lower than they don't do what Megan claims (picture on your site), changing angle of lower arm.
You can not change angle of lower arm when you have 3 fixed points. Upper arm changes angle.
Only way to change angle of lower arm is through shock length or changing mount points to chassis.

Rob, you are correct, RCA does nothing for shock travel and car will still bottom.