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Spring rates

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Mon Oct 10, 2016 1:04 pm PostPost subject: Spring rates
chorlton
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Joined: 20 Jul 2011
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Broke a rear spring on the compact on Saturday so getting 4 new.

No idea what kg rating the existing are so no idea what to buy.

Cars circa 1250kg with driver & fuel.
It's bc coilovers & car felt a tiny bit soft.

Any thoughts anyone ?

Cheers
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Mon Oct 10, 2016 1:52 pm PostPost subject:
Merlin
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No idea on the difference in setup needs between FWD and RWD but on my FWD Prelude (which is the same weight) I have 12 kg/mm on the front and 16 kg/mm on the rear.

Yeah I think the BC's will be fairly soft as they are road orientated.
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Last edited by Merlin on Mon Oct 10, 2016 2:50 pm; edited 1 time in total
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Mon Oct 10, 2016 2:10 pm PostPost subject: Re: Spring rates
Steve H
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chorlton wrote:
No idea what kg rating the existing are


If you weigh yourself on a set of bathroom scales, measure the length of the spring, then stand on the spring and get someone to measure the new length you'll get a deflection measurement, I.e. Lb/xxx of an inch. If the deflection is say 1/4 an inch, multiple the weight by 4, and you'll have a lb/inch spring rate to know where to start from.
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Mon Oct 10, 2016 4:38 pm PostPost subject: Re: Spring rates
chorlton
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Joined: 20 Jul 2011
Posts: 2005
Location: location location

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Steve H wrote:
chorlton wrote:
No idea what kg rating the existing are


If you weigh yourself on a set of bathroom scales, measure the length of the spring, then stand on the spring and get someone to measure the new length you'll get a deflection measurement, I.e. Lb/xxx of an inch. If the deflection is say 1/4 an inch, multiple the weight by 4, and you'll have a lb/inch spring rate to know where to start from.


That's clever
Thanks

Very Happy
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