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  #16 (permalink)  
Old 06-29-2010, 12:49 PM
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Quote:
Originally Posted by ericnova72
The 150 lb rate spring is for the rear. Front spring rates will be in the 300-500 lb area on most front suspensions.
I'm talking wheel rates, NOT spring rates. Sorry about the confusion.
http://www.racetec.cc/shope

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Old 06-29-2010, 01:04 PM
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Quote:
Originally Posted by Scrumgees
How do you come up with 150 lbs/inch?
A very popular reference book among suspension engineers is Race Car Vehicle Dynamics by William and Douglas Milliken. (It can be purchased through Amazon.)

On page 582, ride frequency ranges for different vehicle types are given. For a sports car, the range is from 70 to 90 cycles per minute. For a passenger car, 30 to 50 cycles per minute.

With an 800 pound corner weight, the 150 pound per inch wheel rate would put you right in the middle of the sports car range.

For greater convenience, the ranges can be expressed as a multiplier, which, when multiplied by the corner weight, gives you the wheel rate. For sports cars, from 0.139 to 0.23; for passenger cars, from 0.026 to 0.071 .
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Old 06-30-2010, 10:18 AM
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Thanks so much. This has clarified a lot of foggy areas and given me what I need to read on and actually build up a coilover suspension for my truck instead of air bags that I had settled for instead.

Thanks, i'll post more when I know more, or just have more questions.
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