blacksun

I love the look my Tanabe NF210 springs gives my AWD F-Sport. However, I honestly have never been happy with their performance. So I was trying to figure out what my stock spring rates were to compare them to the Tanabes and other options. I couldn’t find any official info, but did run into this post on the forum (https://www.clublexus.com/forums/sus...ml#post7662952). After converting the numbers from lbs/in to the more common kg/mm I’m getting:

GS350 AWD F-Sport
Stock Front = 5.536
Stock Rear = 3.393

If anyone can confirm the stock spring rates above please let me know. For the board’s convenience here are the spring rates for the more popular aftermarket spring options. (I don't recall seeing them all in one place.) These are taken directly from the manufacturer’s website so they should be accurate:

Tanabe NF210 Front = 3.6
Tanabe NF210 Rear = 6.5

RSR RWD/AWD Down Front = 5.15
RSR RWD/AWD Down Rear = 8.67

RSR AWD Super Front = 5.20
RSR AWD Super Rear = 8.16

RSR RWD Super Front = 4.89
RSR RWD Super Rear = 8.16

Swift Sport Front = 5.0
Swift Sport Rear = 7.5

blacksun

I find it strange that, according to the poster, the stock front springs have a higher spring rate than the stock rears. However, all of the aftermarket springs are tuned so with higher spring rates at the rear. I'm wondering if the poster got the backwards.

peteharvey

Relatively stiffer rear springs promotes understeer.
Relatively stiffer front springs enhances front end grip to promote oversteer.

KraziAzn

bump!!!!!!!!!!!!!!!!!!! anyone know the spring stock for RWD?

Scorchez

It;s actually the other way around. Stiffer rear, more oversteer. Stiffer front, more understeer.