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Old 02-02-2006, 09:16 AM
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How do lowering srings work?

I want to drop my wagon. Can't afford bags right now. So how do lowering springs work? Do you have to tell them how much the car weights at each wheel? Or wil the total static weight suffice? If I want to slam it 2" do I measure from the stock height? Or how it sits now? If the current srpings are tired, and its already down and 1" or so, what then?

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Old 02-02-2006, 09:28 AM
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depending on what kind of car you have, some companys make aftermarket springs that are a direct swap in, but if you lower it to much you change the geometry in the suspension, instead of springs you can use drop spindles which keeps the suspension stock just lowers the car.

i heard some places will heat your springs up and it will lower the car as well untill the hieght you want it is achieved but im not sure how well that works out. another way is to cut the springs, again though i dont know how well that works.
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Old 02-02-2006, 09:42 AM
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It's a 69 Cat wagon, and no one makes dropped spindles for it. I know I can order custom springs, but not sure how to measure the car.
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Old 02-02-2006, 09:46 AM
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if you know the company that you can order these custom springs from just give them a quik call and ask, im sure they will have no problem telling you if they can sell you somthing.

good luck
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Old 02-02-2006, 12:46 PM
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You can do trial and error with junkyard springs. I dropped my 66 Bonneville about 1.5" with 9C1 cop car springs from a 94 Caprice, but I'm using a lighter Caddy 500 engine.

Springs are measured as lbs per inch and its vaguely measurable. I suggest measuring your stock springs and starting from there. If you measure free height, wire diameter, overall diameter, and a couple other things, you can plug the data into this calculator. A drop spring is designed to be shorter and stiffer so it drops the height but prevents bottoming and improves weight transfer for better handling.

No matter what people tell you, don't cut, heat, or alter stock springs. The results are unpredictable and sometimes dangerous. The localized stress risers that are created with hacksaws, cut off wheels, torches, or sawzalls will cause stress fractures which can be nasty. Plus, its always an experiment on height vs. stiffness vs. ride quality. Since you can order custom bent springs for $250 a pair from companies like Afco, there is no reason to either.

Edit: You are in a good position with a 69 Cat. All BOPC 64-97 and chevy 71-97 B-bodies share almost every chassis part in common. Over the years there were about 65 spring part numbers used in them to account for weights of engines, A/C, body metal, level of trim, etc. All 65 examples of springs will directly fit in your spring perches. chances are you'll be able to find about 20 that will work for you My guess is (like my 66 bonny) you can use either regular caprice springs, cop caprice springs, or Impala SS springs. I think the SS springs will slam you a little too low but its worth a shot. From there you can use common sense and that calculator to make educated guesses. For instance, a 1985 Caprice spring might be the right drop with the heavier engine you have, but it would be not enough stiffness to control the weight. Don't limit yourself to GM either. Poke around and measure. An F150 2WD front spring will fit since its the same ID, but it is probably too short and stiff.

Last edited by curtis73; 02-02-2006 at 12:57 PM.
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