Originally Posted by jiii
The first link (http://www.afcoracing.com/tech_pages/spring.shtml#rate) says spring rate increases as spring compresses but doesn't say what happens when a spring is cut. So it does not support the contention that cutting increases rate.
The second link (
http://www.swayaway.com/calculators/swayawayCalc.php#step9 ) appears to support the contention that rate increases as number of coils decreases.
The third link (
http://www.pontiacracing.net/js_coil_spring_rate.htm ) appears to support the contention that rate increases as number of coils decreases.
I can live with that. It's counter-intuitive but so be it.
That doesn't change what I was trying to say - and this really restated another way here:
Originally Posted by jiii
However, because the load height is occasionally inordinately compromised when shortening OE coil springs, the likelihood of near-fully compressing the jounce snubbers may become a more frequent occurrence. The attendant dramatic increase in wheel rate when that occurs could negatively affect the vehicle’s dynamic balance during spirited operation.
Originally Posted by jiii
Some choose to fit springs with a higher rate that better accommodates the reduced jounce travel when reducing their ride height.
Others here have not and yet reported no deleterious results.
But it has been reported. We have people reporting scraping the chassis on the ground. That's something I want to avoid, along with the related, and unplanned stress on the chassis.