Another bit i want to add. I was also from the camp that prefer larger spring rates in the rear, which is contrary to all motorsports level suspension enginering.

Then i started playing with my rake and jesus christ. 6mm more rake made the difference between a balanced setup at 8/9 spring rates and rear sway at soft, to a setup that is wildly uncontrollable in oversteer. I moved my rear sway to full soft and reduced rake to control it a bit better

This gives me a hunch that perhaps a spring choice based on corner weights would be best, using rake to manipulate your roll couple and control load transfer front/rear. This deserves serious experimentation.

 

Who is this addressed to?

The reason for a stiffer rear rate is because that is what the car comes, a rear rata that is about 25% stiff than the front. This is due to the rear suspension having a slower motion ratio for the shock. Evo's are about a 60/40 weight bias. BUT, the front motion ratio is very close to 1:1, while the rear is around 1.3:1 (the wheel moves 30% further than the shock)

 

https://www.evolutionm.net/forums/mo...stagger-7.html

 

note how they say stagger is traditional. then again, you drive a 10, which I think people do run square rates. we're talking about 8/9s here.

https://www.evolutionm.net/forums/ev...-your-evo.html