Re: Front Shock absorbers
Posted: Mon Dec 10, 2018 9:45 pm
rgh0 wrote:nmauduit wrote:alanr wrote:What are your your thoughts on the number of coils for the same length/rate spring, 15.6 original versus 17.5 for a given spring length/rate that everyone now seems to want to sell me. Assuming that it doesn't produce a binding issue I can't see it making a difference but am I correct?
Thanks for the input..appreciated.
Alan.
no coil number does not play a role as long as they do not bind. The manufacturers has a certain choice of wire diameter and strength to make their springs, and they also have to play on coil number to make the various rates they offer since the wire diameter does not come in continuously varying values.
The manufacturer makes his calculation and provides a spring that has the only 2 parameters that count : free length and rate, no matter the number of coils (that is for linear coil springs - i.e. constant rate - like on elans, for variable rate springs it is more complicated).
To get the same spring rate with fewer coils you need a smaller diameter wire. This results in the spring steel being more highly stressed when deflecting the spring the same amount. Plus 2 front springs in their original design were close to the limits hence they tend to sag overtime. More highly stressed ones will sag even faster.
cheers
Rohan
Ha!....Thanks for that explanation!,,,,,Something else to consider.
Alan