Well your suspension setup is good. But keep in mind there are diffrent suspension setups based on what your doing with your car.

I do recommend a strut tower brace if you are doing any road racing or autoX. If your just a DD, or only Drag. Then there is no use for a strut tower brace.

And what is your deffinition of enough rubber? If its sidewall height, a good spring along with a good strut and shock will account for any cushion the extra sidewall height gives. My goal with a 295 was width. I currently only have 255 in the rear and am spinning like crazy, so by adding 80mm more of width I will get better traction. same for the front as well.

But also keep in mind it is perception:
295/30/22 sidewall height is 3.48"
285/35/18 sidewall height is 3.97"
so 1/2" is not a huge amount by any means in tire dampening
but having 20mm more width, is just shy of an extra inch in width.
Width = Traction
Height = Cushion.

 

You can certainly spend money on sub frame connectors and strut tower braces, but Griggs Racing doesn't think they are necessary.

 

i have a stb and subframes...i say go for but it is true build ur set up for what your doing with your car. i do track it and autox it every year. but if its ur dd i wouldnt worry about an stb or subframes.

 

i have a stb but didnt and still havent noticed any real difference. i got it to try and avoid future creaks or squeaks as i am a convertable

 

well... from drivin around all weekend i think i figured out a good setup... I put the sway bars to the middle setting in the rear and middle soft in the front. As for the Koni shocks I set them at 1 turn from firmest in the front and 1-1/2 turns from firmest in the back... this freakin car handles really well... it is very responsive and grips while in turns and much more controlable while drifting. I LOVE IT!!

 

im glad you founda good set up. and glad your enjoying your konis