I had the TRD lowering springs on my 05-06 tC I purchased them a while back and they are the white springs does anyone know what the actual spring rate are on these? Anyone know the OEM spring rate for factory springs? I have searched SL and yahoo and not found what I am looking for. I don't need to know how much it lowers the car just the spring rates.

I have purchased B&G suspension RS2 coilovers and I want stiffer spring rates, right now as per B&G Suspension the coilover's have a spring rate of 6kg front and 8kg rear. I want stiffer but not rock hard any suggestions for good spring rates for racing / street use. Car will be putting down est 600whp it will be detuned for track so I can get traction.

 

Here you go man,

http://www.yoursciontc.com/forums/in...pic=16894&st=0

 

How do you convert those rates to KG rates? its showing OEM 146 F 268 R? TRD 168 F 324 R.

 

yea i dont know how to do that because some use the spring rates like on that chart and others use the KG. TRDs arent very stiff, im sure they are no where near as stiff as coilovers.

I know im looking at getting BC racing coilovers and they come with 8k F and 10k R

 

I have found the answer thanks to Brian! Divide by 56. To convert KG to the measurements multiply by 55.88.

OEM 2.6Kg F 4.78 Kg R
TRD 3Kg F 6 Kg R