It is a bit complicated... if you cut off .5" you could see 1" at the wheel based on the location of the spring on the arm. But this is .5" of free length and what matters is the installed length so the drop would likely be less. This is further complicated by the change in spring rate.Gambi69 said:Hi all,
My question is a three - parter:
I am re-using my stock front springs on my 69. They are small block springs, and they are 18" uninstalled. I want to cut them down a little, to lower the front just slightly. My question:
1. Will cutting them down to 17.5" (3/4 of a coil) have any effect, or should I do more?
Again the important parameter is installed length. You would have to install and load the springs to tell if you really have a problem or not.Gambi69 said:2. One side is 18", and the other is 17 3/4", leading me to believe one has worn more than the other. If I cut them both to 17.5" (meaning LESS than 3/4 coil on the one that is worn) so that they are even in uninstalled length, will that restore them to being even once they are back on the car?
By shortening the length of wire you do increase the rate by some amount. It would seem to be minimal at this amount of length change though.Gambi69 said:3. I've heard this increases spring rate. Does that mean that they will get a little stiffer by cutting them down? This SEEMS like a good thing, if it's in moderation for bringing life back to old springs?
Perhaps the bigger question is if this setup would work. When you lower the suspension if has less travel before it hits the bump stop. In well designed setups this is compensated for by an increased spring rate. You want to just hit the bump stop sometimes, not too hard and not never. So there is a balance point. By cutting the springs you do not increase the spring rate sufficiently so you start hitting the bump stops more and harder when you do. This is detrimental to ride quality and life span of suspension parts.