spring rate comparison? - Suspension and Brake Forum

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spring rate comparison?
Sunday, May 08, 2005 9:33 PM
right now im running my cav on apex springs with agx struts, frnt and rear strut bar, sub frame brace and soon to be rear sway bar. i want somehting a little stiffer spring rate wise, i wont go to a coilover setup though, i dont wnana spend the money on the damn thing. what is the most reccomended spring? everyone says the eibachs are a great choice, i was thinking of the tein springs, anyone have any experience with these?




parting out my built and boosted 97 z24 so4x4.com/cavy.html for pics and a parts list

Re: spring rate comparison?
Sunday, May 08, 2005 10:10 PM
megan racing springs are 335front 250rear those were the spring that i was going to run for autox but i changed my mind after watching still photos of autoxfools cav with GC/konis 325f/200rear. thats why i went with rk coilovers 375front 325 rear. with a big rear bar it is nice. the car corners flat and is fast on course


see ya!

Re: spring rate comparison?
Sunday, May 08, 2005 10:24 PM
nice, thanks for the info. the problem i have now is that my ass end is a little loose sometimes. i think its because i run no interior past the front seats and it lifts a bit. im also gonna start playing with the settingsin the back, almost feels light it might be too tight so i might turn it down a notch and see how it grips then. im sure my rear sway bar iwll solve alot of these problems though




parting out my built and boosted 97 z24 so4x4.com/cavy.html for pics and a parts list
Re: spring rate comparison?
Monday, May 09, 2005 5:56 AM
with coilovers you pay a bit more upfront, but you then have the adjustabilty of choosing your own spring rate later and extra springs dont really cost that much.

with progressive springs, its basically the lower you go the stiffer it gets.



Re: spring rate comparison?
Monday, May 09, 2005 8:48 AM
yeah, thing is if i go with a coilover setup itll be something like the teins or a high end company, i enjoy the ride i get now but you can never have a stiff enough ride. as it sits the car handles great, i just wanna add to that a little




parting out my built and boosted 97 z24 so4x4.com/cavy.html for pics and a parts list
Re: spring rate comparison?
Monday, May 09, 2005 9:00 AM
With the Eibach Pro-Kit I think the "stiffness" depends more on the shock then the spring. They felt real sloppy on stock shocks, and good on koni yellows on softest setting.... firmer then I can stand when on the konis' firmest setting. The springs are progressive coils which makes all the difference IMO. If you look at the rears with the Pro-Kit and the car on the ground, the close coils are all squished down touching each other, then it is spaced out a lot further down. I almost think they have too much range in the rear progressive spring, since the smaller gaps get squished down to nothing on the car. Nice ride though.

- Ken

'99 Z24, Manual
Re: spring rate comparison?
Monday, May 09, 2005 11:32 AM
cool thanks for the input. im not sure what route im gonna go yet, i mean my car handles great but you always want more you know.




parting out my built and boosted 97 z24 so4x4.com/cavy.html for pics and a parts list
Re: spring rate comparison?
Monday, May 09, 2005 1:35 PM
Ken Rushia wrote:With the Eibach Pro-Kit I think the "stiffness" depends more on the shock then the spring. They felt real sloppy on stock shocks, and good on koni yellows on softest setting.... firmer then I can stand when on the konis' firmest setting. The springs are progressive coils which makes all the difference IMO. If you look at the rears with the Pro-Kit and the car on the ground, the close coils are all squished down touching each other, then it is spaced out a lot further down. I almost think they have too much range in the rear progressive spring, since the smaller gaps get squished down to nothing on the car. Nice ride though.

- Ken


anything will feel sloppy on stock struts...

stock struts are made for soft stock springs... anything thats lowered will be stiffer, which will overpower the damping force of the strut.



judgez24

actually you can have a stiff enough ride. plenty of peoples ride have been so stiff from crappy coilovers, which the suspension helps the car in the turn, but with lack of suspenion motion, it overloads the tires traction point, and they spin out.

theres been a few in the jacked wrecked forum over the months with spinouts and totalling the car



Re: spring rate comparison?
Monday, May 09, 2005 8:07 PM
yeah true. i htink ill grab a tire with a hard sidewall and see how that changes things around, im running a kuhmo 712 on a gtz rim right now, its wider and fits the rim better, definatly handles better than on the stock wheels




parting out my built and boosted 97 z24 so4x4.com/cavy.html for pics and a parts list
Re: spring rate comparison?
Tuesday, May 10, 2005 7:06 AM
If you can find them but from what i remember couple years ago. Arospeed Springs were one ot fhe high spring rates if not highest


2004 Grand Prix GTP (Competition Group)
SOLD-->1999 Z24 5M-#30 to register on JBO
"You can please some of the people some of the time but you can't please all the people'
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Re: spring rate comparison?
Tuesday, May 10, 2005 7:58 AM
anybody know the stock spring rate, and the rates for the eibach prokit and sportlines? thanks


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Re: spring rate comparison?
Tuesday, May 10, 2005 10:00 AM
land pirates cavalier wrote:anybody know the stock spring rate, and the rates for the eibach prokit and sportlines? thanks


progressive springs dont really have a set spring rate like single sized coils.

like on coilovers, the entire spring is one rate usually, besides the progressive ones.


prokits are like 15% stiffer than stock from callin em.



some places give you a "range" of rates, but alot of times its not all that accurate. with the heaviest number (the stiffest) there might only be about 2-3 inches worth length of that coil size. which prob will never be used.

same as the lighter side of the coil. might be 100+ but below 115, but 98% of the time it will never be used.



Re: spring rate comparison?
Tuesday, May 10, 2005 12:14 PM
if you want uber-stiffness, just replace the springs with a big beefy chunk of PVC pipe with thick rubber end caps

'99 Z24, Manual
Re: spring rate comparison?
Tuesday, May 10, 2005 1:25 PM
pvc would split on the first decent bump.

might as well steel rods in place of the struts.



Re: spring rate comparison?
Tuesday, May 10, 2005 1:35 PM
... and replace your strut mounts with thick steel plates. Heck you can use huge threaded steel rods for struts, and you can adjust your ride height by screwing the "strut mount" onto them further. Of course you'd have to punch holes in the hood if you want a long range of adjustability

'99 Z24, Manual
Re: spring rate comparison?
Tuesday, May 10, 2005 1:39 PM
let gravity do the work... none of this prefabbed hood stuff. using fiberglass will make it easier



Re: spring rate comparison?
Tuesday, May 10, 2005 10:59 PM
i was thinking of just using a piece of swaure bar i have and putting the car 2 inches off the ground




parting out my built and boosted 97 z24 so4x4.com/cavy.html for pics and a parts list
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