Linear (No progressive) springs

[Mach V Dan]

Originally Posted by Mikepage

Thanks Dan for the explanation. Where i can put your springs into my list finally :P ?

I guess my point is that simply categorizing springs into "linear" or "progressive" is not going to be accurate. Our springs are effectively linear during normal use. But the entire spring is not wound exactly the same. That's true of most aftermarket springs I have seen for this car.

--Dan
Mach V

[Racecomp Engineering]

Right. Effectively linear is probably the better way to put it. They are not linear like a coilover spring (and you can't really do that for a lowering spring anyway like Dan pointed out).

Heck, even coilover springs are not 100% linear.

- Andrew

[Mikepage]

First post is updated!

[Mikepage]

Bump, need info from Hotchkis and Swift Sport please.

[Nitro22]

Similar to the other manufacturers, Hotchkis coils operate with a linear rate at load height and bump conditions.

Cheers,
-Aaron

[Huehuecoyotl]

question as there appears to be some spring talk and expertise here:

my coilovers have a gap of 20mm on my coils @ full droop, and so I want to fill the void with a helper spring.

they come in rates like 6lb, 12lb and more, some are 4" and some longer- how does one choose? I think I am looking for a 1/4" type compressed stack

I see where many advise this is nothing to be concerned with, but for me, there are areas I drive fast both on and off track where getting air is par for the course

would a 6lb be too light to do the job and prevent it all from rattling as it gets unseated? whats the point at which its too stiff a 'helper'?

or do I simply want a longer primary coil spring to better fit my ride height with the Ground Control coilovers I put on today? thank you

[Mikepage]

Originally Posted by Nitro22

Similar to the other manufacturers, Hotchkis coils operate with a linear rate at load height and bump conditions.

Cheers,
-Aaron

Bump, Hotchkis team can you confirm? Linear or progressive?

[mike_ekim1024]

Originally Posted by Mikepage

Hi,

I want to know which aftermarket springs are not progressive.

I have Tanabe GF210's on my FR-S, and I like em:
http://www.tanabe-usa.com/gf210.asp

I haven't autoX'd in these yet, will have to do it soon.

[Aaron@Hotchkis]

Originally Posted by Mikepage

Bump, Hotchkis team can you confirm? Linear or progressive?

Hi Mike,

Yes, our coils operate as linear springs at ride height and bump conditions.

Cheers

[Mikepage]

first post updated

Thanks!

[Mikepage]

First post updated with Racecomp Tarmac!

[Mikepage]

Updates on first post!

Correct me if am wrong

[Mikepage]

I just found a nice write up concerning progressive and linear springs. It's an old email from Tanabe, i know but the info stay the same today.

Source : http://forums.evolutionm.net/evo-tir...e-gf210-5.html

"Here is some suspension 101

The GF210 coil spring is geared more towards performance and track use due to its more linear rates and higher spring rate, but is completely suitable for daily driving.

Regarding progressive and linear rates, there is a lot of misinformation on the internet as to what is better, why, and what to look for. Many people tend to ask "Are they progressive or linear?" For standard coil springs that mount to OEM style shocks and struts, they cannot be one or the other.

Standard automotive coil springs (with the exception of fixed diameter springs for adjustable coilover suspension) are both linear and progressive. For drivability and ride comfort, a portion of the spring uses a progressive rate, while the majority is linear. One thing that sets different manufacturer's springs apart is the percentage of progressive 'coils' on the spring versus the linear 'coils'

The GF210 for the Lancer EVO VIII is predominantly linear.

Typically the progressive coils are wound tightly together and are located on the the top and bottom of the spring. The center portion has evenly spaced coils, which is the linear rate.

What dictates how many progressive coils a spring should have? This can only be determined through thorough R&D, and is dependent on many factors, including upper and lower OEM spring perch, weight of the vehicle as well as several others.

The progressive coils located on the top and bottom of the spring help with daily driveability and work to absorb some of the shock from irregular road conditions.

A common misconception is that the struts dictate driving performance. Struts, also called dampeners, work in conjunction with the spring to ensure that the bound and rebound of the suspension is not too quick, or too slow. The majority of suspension travel and handling is performed by the coil spring. If a shock (or adjustable coilover in many cases) is valved too stiffly, it is not allowing the spring to perform it's function. This is a huge misconception with many people who are looking for adjustable coilovers and look strictly at the dampening stiffness as a gauge of 'performance.' A stiff dampener does not compress nor rebound quickly, which means the contact patch of the tire with the ground is not optimal or at 0%. A proper spring/strut combo or adjustable coilover suspension will have a spring rate and internal valving that is mated to complement each other. "Stiffer is not always better"

Tires are the only thing connecting the car to the road, if the contact patch is not optimal or non existent, then handling performance is degraded.

Best Regards,
Tanabe Racing Development, USA"

[Mikepage]

Bump!