I think it would be the same as the WhiteLine on the stiffest settings. Its a sway bar so there isn't too much to be changed besides where the hole is. Whiteline on the stiffest settings will def get the back end to swing out if you want especially when it rains.

 

I think it would be the same as the WhiteLine on the stiffest settings. Its a sway bar so there isn't too much to be changed besides where the hole is. Whiteline on the stiffest settings will def get the back end to swing out if you want especially when it rains.

From the Corksport link in the 1st post, I'm not sure where Corksport gets the idea that their 25mm rear bar is 70% stiffer than the 23 mm oem rear bar. Ususal D^4 comparison would put it at 40% stiffer, assuming the distance between the link hole ad the bar axis is the same. If anything it would be softer than the D^4 multiplier, since the extra bending in the loop is based on a D^2 factor.

Whiteline's data implies that the "long lever" hole has the same distance to the bar axis, making the 24mm bar 19% stiffer, consistent with a D^4 comparison. They state the short arm position, for their 2 hole bars, is equivelant to 1mm more dia. That puts it at 40% stiffer, just as you predicted, but far less than the unusual prediction by Corksport of 70% stiffer.

What's up Corksport ??

Again, on the other thread, Corksport was way off on the effect of the bigger bar:

"Turning compresses the inside suspension...."

The inside suspension extends, while the outside compresses.

".....The CorkSport sway bar attaches both sides of the rear suspension together and resists weight transfer to the opposite side when your Mazdaspeed 6 turns...."

With no new front bar, the Big rear bar increases weight transfer at the rear, decreasing understeer/push.

"...This anti-sway bar effectively increases the spring rate on the inside suspension and the effective extra spring rate helps to minimize traction robbing body roll."

This bar increases the net spring rate on both sides of the suspension when cornering. The exception would be some Nascar setups for ovals, where they use chain links to replace the inside rigid link (normally in tension) so if the car looses control, and sways in the opposit direction, the sway bar is negated as the chain tension changes to an impossible compression condition.

 

Gotcha. Is it possible change the Whiteline RSB setting without taking everything apart again?

I guess it is nice to have options either way...

 

I've read on another thread that aftermarket springs may cause the Whiteline bar to rub if on stiffest setting... requires some grinding of the bar ends. Seems like the Corksport would avoid this problem.

 

This is true, it does rub with aftermarket springs. I was stupid and didn't shave it down before installing. I'm gonna try to do it w/ a dremel here in the near future. Any suggestions on how to do this without taking the bar out?

 

It sounds like you can do it by loosening the end links without taking the bar out per this thread:

http://forum.mazda6club.com/speed6-...hassis/181457-those-you-whiteline-bar-lowering-springs.html?highlight=whiteline

 

Sorry to revive an old thread but you mention it rubs with aftermarket springs, what about after market coilovers? BC's to be exact. Thanks

 

It doesn't matter if its springs or coils, it rubs on the arm for the spring cup. The lower you go, the more rub. As for shaving the whiteline down, it's actually quite easy with a dremel.

 

I've never experienced rub. But, yes I do recall hearing about this issue long ago.
Been slammed on BCs, with the stiffest WL RSB setting for quite a few years. The only issue I have had with my suspension setup this far has been the AWR endlinks, which seem to wear out pretty quickly. Those that are rubbing, are they running OE endlinks?
And if you guys are sanding/grinding material down off of the bar, are you painting back over your work area?

 

Are any of you guys running the CPE rear diff mount with the Whiteline RSB? I tried installing the CPE today and I can't get it level without it contacting the upper portion of the sway. See pics. What do you think I'm doing wrong?