Quote:
Originally Posted by CTWV50
Oh also I forgot to mention I used this website to work out spring rates. Very useful! I worked out sprung and unsprung weight using our weight watchers glass bathroom scales! And they didn't break! Not the most accurate weigh to work out unsprung weight but it must be close.
http://www.hypercoils.com/spring-rat.../#.UymYXNwwgfp
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I've looked at that calculator before and didn't much like it to be quite honest.
Ideally you want to be calculating spring rate based on wheel rate, then adjusting ride height with pre-load and/or spring length.
That calculator seems to do it ar5e about face and calculates spring rate based on ride height, then tells you what wheel rate you'll happen to end up with.
Converting those figures to wheel frequency you'll have 135 cpm by my calculations.
As a guide:
60 – 80 cpm Comfortable road car
80 – 100 cpm Sports road car
100 – 125 cpm Racing cars without wings
200 – 350 cpm Current racing cars with downforce