graygmc

what the hell is linear rate? ok what i got from learner about progressive rate is that under normal bumps in the road the spring is supposed to act like a stock spring and be a little soft. and when you are under hard cornering the spring gets stiffer for less lean.

BigKID

iTrader: (5)

You are correct with you asumption of Progressive rate. The first bit of travel will be soft untill it is compressed to a point then the spring becomes really stiff. Hence there are two different spring rates wound into the coil. A linear rate spring has a spring rate that goes up linearly as the spring is compressed where a progessive rate goes up exponentially.
You definately want a progressive rate spring on a heavy truck if you are going lower. A shorter linear rate (like a shorter stock spring) will allow you to bottom out much easier that a progressive. Unless it has a high spring rate to start with. In that case it will just give a harsh ride. Progressives give you the best of both worlds, kinda like the Edelbrock shocks. Btw.. hotchkis' are progressive.

01 5.3

iTrader: (10)

I talked to a technical guy at hotchkis and he said their coil springs where also linear. I would like to make sure before I ordered a set.

BigKID

iTrader: (5)

I am not going to dissagree with the tech at Hotchkis but they are made and act just like progressives. Read the discription and look at the construction of the springs. http://www.hotchkis.net/cgi-bin/Soft...847+1063924169