Can anyone suggest a spring rate for the rear of my mid engine buggy? I've got some 16" long coilovers coming, but not sure where to start on spring rate

you need the weight of each rear wheel and then just call spring or shock company and they should be able to help you out

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Just Stand On It!!!!

Chris

Tried that when I ordered the coilovers, but because this sort of application is unheardof here in the UK they couldn't help, other than "buy a 100lb and try, if its too soft buy some stiffer ones"

Give Downsouth Motorsports a call, he is the best guy to talk to when it comes to coilover shocks, Kings, Foxs, Sway-a-Ways brand shocks, here is a link to his website and phone number.......http://downsouthmotorsports.com and the number is toll free unless you order since you're in England, hopes this helps.

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"Loud pipes saves lives"

Spring rate calculators.
http://f-o-a.com/
http://www.swayaway.com/TechRoom.php

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Of all the things I've lost, I miss my mind the most.
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Ahhh awesome Mike.. I'll dig out the corner weight gage later...

Fwiw, for the comping we aim at 3G of spring rate over the travel at the rear - i.e, if one rear corner has 500lb of weight on it and 10" of travel, I'd aim for a wheel rate of about 150lb/inch, if the coilovers hit ~8" down the arm then about 240lb/inch at the spring depending on the angle of the coilovers.


Depends on what you're doing really though, how much travel you have, whether you want a progressive setup, what the rear unsprung weight is, damping.......
I tend to go the opposite way to a lot over here and the more travel that becomes available the stiffer I'll go on the main spring - but make it shorter and run a longer, softer tender and let damping and extra droop travel do the work over the washboard stuff.

I used Mike's F O A calculation and came up with 220lb, so got some Faulkners 200lb springs and they're spot on with about 1/4 of preload.. I was so pleased I had to take it for an illegal night time blast