what spring rates for track coils? (g37)

[w0ady]

figured id post this here since theres not as much track experience on myg37. thanks in advance!

from my latest track thread @ roebling

UPDATE: bad news: i need coilovers. good news: i need coilovers lol.

just came from infiniti, had my head tech do an oil change and a thorough inspection. looks like my plowing issues arent just the weight but my springs are too soft - the control arms are bottoming out on the sway bar. this is what killed my end link last time. the new yokohama tires are stickier and the extra traction is being taken out on the car. luckily levin was awesome enough to help me weigh the car so i have my 4 corner weights. i need to call and do some research with race spring manufacturers. hopefully i can get an idea for what rates i need. ive been debating ordering some adjustable bc coils and looks like theres no more debate. just need to figure out the specs and ill be set. its pay now or wait and hurt the car/wear through tires.

current setup is eibach pro

Spring Rates:
Front: 228lbs/in initial, up to 548lbs/in
Rear: 371lbs/in initial, up to 531lbs/in

with 3/4 tank of gas, my curb weight is 3904 lbs and corner weights are:

lf 1094 rf 1026
lr 905 rr 879

so with my current understeer and bottoming out on the front springs - i need help on figuring out just what spring rates i should get if i buy coils. im going with a linear setup. it will only be for 4-5 track sessions a year at this time so i need something streetable that will still do the trick. any ideas?