deciding on lowering springs

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11-21-2009, 01:22 PM

#11

Z28KLR

4th Gear Member

Join Date: Nov 2009

Location: SoCal

Posts: 1,826

From what I understand, it is best (although sometimes unnecessary) to replace shocks and struts to ones better matched to the new spring rates. I haven't gotten around to doing this on my car yet; I've had the Sportlines on for about 2 years now but I'm sure that when I do finally replace the shocks and struts I'll wonder why I didn't do it sooner.

11-21-2009, 02:20 PM

#12

stangalator

4th Gear Member

Join Date: Apr 2008

Location: New York

Posts: 1,306

Quote:

Originally Posted by IRSmart

so the general consensous is the pro kit. i already have a set of CC plates (UPR, not installed). someone on corral told me that with such a minor drop that the pro kit has, i will not need new struts because the OEMs can handle the drop. is this true? i have 100,000 miles (almost to the number) on what i assume to be the original struts. if i'm going to do the suspension, i should get new ones, and i should upgrade them because of the drop, correct? are the tokio's much cheaper than the bilsteins?

You should get new struts when you increase the damping on your spring damper suspension system. If you don't you'll notice a bounce because c^2 =(should)= 4mk where m=mass of car, k= is the spring rate, c is the damper coefficient(for a critically damped system). So if you increase the 4mk side you'll have an under damped system.