LocostUSA.com

Procomp is a UK outfit that builds and supports a lot of car in the Locost race series. I have been talking to Matt one of the founders about building me some shocks. He is not building shocks anymore because of poor health. We was good enough to give me the specs of how he build shocks, I am going to get a set of shocks built to his specs, the information he gave me does not make sense to me I hope it does to an experienced shock builder. But back to sprint rates: for the front it depends on your shock angle from 30-45 degrees the rate is from 325-400, for the rear it's 150.



Graham

http://procomp.co.uk/

https://youtu.be/NnEH1ac6BCE

Graham "this is a trap" [ go directly to jail ]

You need to compare wheel rates not spring rates. More info is needed.
I would guess that the suggested front springs are too high and the rear needs to go a little higher. You need to look at the geometry of the suspension system.

Yes, the geometry is important. The motion ratio is 'cubed' when calculating spring rates. For example a 10% decrease in motion ratio means you need nearly a 25% increase in spring rate to equal the same wheel rate. A .6 motion ratio would require nearly triple the spring rate of a 1.0 motion ratio. This is partly why it's moot comparing two differently built cars spring rates. It means next to nothing and why Dave is telling you to look at wheel rates.

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Peace, Ron