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Hey all, recently came across this message on a Cadillac forum:
"Eibach springs are progressive spring rate and Hotchkis are constant spring rate. This means that as the Eibach springs compress, the spring rate coefficient will increase causing their stiffness to increase. Superiority of either spring is arguable...it's more of what you prefer.
I had the Eibachs and didn't like them because the progressive spring rate made the front of the car bounce too much. Some people don't mind it. The lower spring rate at ride height of the Eibach springs is supposed to make the ride smoother under normal driving conditions and stiffen up when compressed during turns. I found that this caused the car to dive too much during breaking and made it feel unstable during turns if the car went over a bump mid turn. It also didn't reach equilibrium as quickly after hitting a bump. I switched to Hotchkis springs and liked them much more. No more bouncing, diving, or instability but the ride is a little less plush. Personally, I would rather have a slightly more firm ride than a bouncy ride so I stuck with the Hotchkis springs."
I know many people here have ProKits on their cars and I was leaning toward this set-up myself. However I'm very interested in handling performance as well as lowered appearance so this bummed me out a lil. Anyone find they've had problems similar to those stated above with Eibach's on Foci? Thanks for any info to help my decision! [thumb]
"Eibach springs are progressive spring rate and Hotchkis are constant spring rate. This means that as the Eibach springs compress, the spring rate coefficient will increase causing their stiffness to increase. Superiority of either spring is arguable...it's more of what you prefer.
I had the Eibachs and didn't like them because the progressive spring rate made the front of the car bounce too much. Some people don't mind it. The lower spring rate at ride height of the Eibach springs is supposed to make the ride smoother under normal driving conditions and stiffen up when compressed during turns. I found that this caused the car to dive too much during breaking and made it feel unstable during turns if the car went over a bump mid turn. It also didn't reach equilibrium as quickly after hitting a bump. I switched to Hotchkis springs and liked them much more. No more bouncing, diving, or instability but the ride is a little less plush. Personally, I would rather have a slightly more firm ride than a bouncy ride so I stuck with the Hotchkis springs."
I know many people here have ProKits on their cars and I was leaning toward this set-up myself. However I'm very interested in handling performance as well as lowered appearance so this bummed me out a lil. Anyone find they've had problems similar to those stated above with Eibach's on Foci? Thanks for any info to help my decision! [thumb]