Springs and Spring Rates

[APEXistud]

Sorry to break the topic here, but the old one used to be a rear shot of a nice Supra. I'll make the next one a Xavani Nismo Skyline GTR for you.

 

[dmitrik4]

That is odd. the JIC's have a stiffer spring in the front than in the rear...

what's odder is that the JIC and Tein setups are so different:

JIC: 393F/225R
Tein SS: 336F/280R

the teins are much softer in the front and stiffer in the rear. the softer fronts i can see b/c as i understand it, the SS kit is less "hardcore" than the FLT-A2...but why is the JIC kit so much softer in the rear?

edit:

here is the stock info i have been able to gather:

ES/P5: ?F/?R <--- can't find this info anywhere
MP3: 215F/152R <--- from this thread
MSP: 145F/118R <--- obtained from mazdausa.com

the MP3 numbers can't be right unless the MSP uses softer springs...?????

 

[Logan]

The MP3 and MSP spring rates are the same. Close to 145 front and 117 rear.

Stiffer rear springs will help induce oversteer.