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Originally Posted by Dropspeed
Pedders claims they are a "linear rate" and I received that text from an email I sent to Pedders AU after Pedders USA closed shop. It was very interesting to me as before I got them Pedders USA stated the spring rates were higher than the stock springs rates, but would not provide the rates. My car sits 14/15mm lower in the front and 30/35mm lower in the rear with the Pedders set-up.
What is the difference between a linear rate spring and a dual or multi rate spring? Assuming all Gen5 drops springs that are installed on a stock strut (not coilovers) have to be one or the other.
Thanks,
Matt
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The spring on the left in the picture below is a true linear rate spring. The coil size and spacing is the same throughout it's entire length.
The middle spring is the dual rate. You can see that there are two distinct regions at the top and the bottom of the spring. It is kind of like stacking linear rate springs on top of each other. The first part of the spring that compresses may have a softer rate, like the 130lbs number mentioned previously, to soak up pot holes and bumps and then it jumps to a stiffer rate after that.
Then, while not being the best visual example, on the right is the progressive rate spring. The coil diameter gets progressively wider from top to bottom on this one. The picture I posted in the OP is a much better example.
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Originally Posted by kream88
Great read lots of great information.
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Quote:
Originally Posted by billk
Thanks for the info Chase! I was just coming on here today to order springs for my 1LE. Perfect timing!
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Glad it was helpful.
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Originally Posted by zfuzz
Hey Chase, regarding the Pfadt springs I just stumbled across this thread http://www.camaro5.com/forums/showthread.php?t=214262 that was started in 2012. It discusses the Pfadt springs /isalators and spring noise.
The image below is what Pfadt said was the proper position for the isolators on the rear springs.
Here is an image of the springs that I just purchased. The rears appear to have the isolator in the same spot. My question is this still correct and is there a right and wrong position for the isolators on the front springs. It appears they come with two.
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The isolators should be placed properly right out of the box.