Looking for stiffer rear springs for tc kline

[nextelbuddy]

I got a set of tc Kline setup for my wagon. Came with ground control rear adjustable perches.

The front spring rate are swift 9k (504lb) and the rear spring rate is Hyperco 550lb.


I'm noticing that even though I adjust the spring perches up a significant amount, it doesn't make much of a difference with how much the tire tucks in the rear Arch. It goes up a little bit but not as much as I think it should and I think maybe the extra added weight of the wagon is causing this. It's also a little soft in the rear as well

I'd like to try a stiffer spring in the rear to see if I can mitigate this.


Was thinking maybe something along the lines of 11k or 12k springs for the rear..

I'm not really a suspension guru so I don't really know where to find just rear springs that will fit the ground control perches.

[SQ13]

Are the rear springs 60 mm, 2.25”, or 2.5”? If you want Swift springs, 3DM sells them. You can also save some money by going with Eibach springs.

https://3dmmotorsport.com/collections/swift-metric-coilover-60mm-id-springs

Pages 14-28 are relevant for your application. Once you figure out the specs you need, just search the part number and buy from the cheapest vendor.

https://eibach.com/storage/catalogs/eibach-motorsport-catalog.pdf

[Stilt]

I got a set of tc Kline setup for my wagon. Came with ground control rear adjustable perches.

The front spring rate are swift 9k (504lb) and the rear spring rate is Hyperco 550lb.


I'm noticing that even though I adjust the spring perches up a significant amount, it doesn't make much of a difference with how much the tire tucks in the rear Arch. It goes up a little bit but not as much as I think it should and I think maybe the extra added weight of the wagon is causing this. It's also a little soft in the rear as well

I'd like to try a stiffer spring in the rear to see if I can mitigate this.


Was thinking maybe something along the lines of 11k or 12k springs for the rear..

I'm not really a suspension guru so I don't really know where to find just rear springs that will fit the ground control perches.

GC's rear perches come in either a 2.5" inner diameter or a 60mm inner diameter, so before you buy springs, I'd check to see which ID the rear springs you have are now since Hyperco sells rear springs in both inner diameters. You could go for either Swift or Hyperco springs.

Note: Depending on whether the rear springs are linear or progressive, you may need to accommodate the increased spring rate in terms of the length of the spring.

For example, on TC's website, the height for their rear progressive 700lb (12.5 kg/mm) spring is 6" while their 600lb spring (10.7 kg/mm) is 6.5".

Also, note that I am not a suspension guru by any means lol.

[jvit27]

Sounds like you need a longer spring, not necessarily a stiffer one. Having sufficient droop travel is important for ride quality.

For example, on TC's website, the height for their rear progressive 700lb (12.5 kg/mm) spring is 6" while their 600lb spring (10.7 kg/mm) is 6.5".

Also, note that I am not a suspension guru by any means lol.

Little known fact TCK springs have the sag engineered in. The lengths vary on rate so you can swap them out without having to readjust or re-scale the car.