Spring Rubbers?
 

Does anyone have any experience with these? I'm wondering if it might be a good compromise to allow me to keep the spring rates that I have (which I like) but allow me to bump up the spring rate for autocross days.

Any pros/cons of using them? Are they allowed in STX? Does anyone make them specifically for my KW V3 coilovers? I've never used them before, so I'm just looking for input.

To clarify, this is what I am referring to:

http://www.timskelton.com/lightning/..._installed.jpg

arent those spring spacers only used for transportation purposes? like when the oem's ship out their cars to the ports and the ports to the dealer lots.

that looks really sketchy to me lol.

You're running V3 coil overs and are trying to use a gimmick like "spring rubbers"?

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I've seen them used by other folks at autocross. I don't really know much about them, so I was curious if they were common or not. One guy slipped them into the springs on his restomodded Camaro after a run to stiffen up the rear and eliminate some understeer.

It seemed kind of sketchy to me too but the little bit of Googling I did at work today led me to believe they are used in NASCAR and things so it can't be completely brainless, but maybe it isn't a good idea. I have no idea. Was just looking for a way to increase the spring rate without changing the spring.

Spring rubbers will be categorized by spring size, go for a search see if you can find something that looks like it fits and if it's affordable buy it. I think V3's are 60mm springs but I'm not positive, it will likely take some legwork to find the right parts.

Yes, it's been a staple in NASCAR for decades, also Indycar and Outlaw/Sprint Cars. I say try it, maybe it's the perfect fit, maybe it's a disaster, maybe it's the ticket to top time of the day. Trying things is how you find an edge.

I just want to make sure I won't damage anything. I can't see why it would, though. Thanks for the info!

We use spring rubbers all the time, it's the only way you can change spring rate during a pit stop

How does one calculate the new spring rate to make sure you're getting what you want?

It's not a simple calculation.

Spring rates are based on the diameter of the "wire", diameter of the coil, and the number of active coils.

LINK to Engineer's Edge

Spring rubber supports and couples the motion of adjacent coils. It doesn't completely deactivate a coil, but it reduces its contribution to the active coil count. Less effective coils = stiffer overall rate.

You can see in the table below that it can add 5-10% to the effective spring rate.

LINK to Hot Rod Magazine article
http://image.hotrod.com/f/30658983+w...ce%2bchart.jpg

For the record, you can do this very safely. It's better to run the right spring... but you won't damage anything, even with multiple coils coupled.
http://fatcatmotorsports.com/igaller...er_rear_NA.jpg

I seriously thought it was going to be this. Sorry, Guess I'm down in OT too much...

http://www.great.ru/media/uploads/spring_01.jpg

Ha! I am running those coilover covers tho, haha.

I've used these for years in other vehicles. Mostly for preventing rear sag when heavily loaded.

Booze cruises etc ������

Never had any problems and worked perfectly