cut springs
03-10-07, 02:30 AM
#1
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cut springs
as far as having cut springs, it's a general question but how bad is it as far as running with cut springs and kyb shocks? i love the lowered look but wasn't sure how much it harmed the suspension/shock set up.
i know it is wearing out the inside of the tires (cambered out). but trying to spot anything else that might negatively effect the car.
thanks for your opinions
i know it is wearing out the inside of the tires (cambered out). but trying to spot anything else that might negatively effect the car.
thanks for your opinions
03-13-07, 11:43 AM
#6
Zombie Slayer
You are also changing the actual dynamics of the spring which is why it is not recommended in any instance!
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03-14-07, 09:53 AM
#11
Oh Wow coming from being on a member on Corrola, 240sx and Rx7 boards, some people would cut their springs and we would say thats cheap and bad for your suspension. I didn't know Lexus guys did this too. 
But anyways learning from suspension physics, cuting springs increases the shock travel, making the car really bouncey and increasing the chances of blowing the shocks.
BTW KYB shocks in general GR2 and AGX are not meant for drops more than 1.5 inches, or else they will blow since they are stock with minor damper adjustment (AGX)
However if you cut a linear rate spring (swift springs). They won't create the bouncey effects of a progressive rate spring cut (stock / most aftermarket)
Do the right thing don't cheap out on suspension. Get Coilovers
or if you must shocks and springs
But anyways learning from suspension physics, cuting springs increases the shock travel, making the car really bouncey and increasing the chances of blowing the shocks.
BTW KYB shocks in general GR2 and AGX are not meant for drops more than 1.5 inches, or else they will blow since they are stock with minor damper adjustment (AGX)
However if you cut a linear rate spring (swift springs). They won't create the bouncey effects of a progressive rate spring cut (stock / most aftermarket)
Do the right thing don't cheap out on suspension. Get Coilovers
or if you must shocks and springs
03-14-07, 11:34 AM
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Cutting the springs add more problems then good. If you cut the spring, you take away the springs capability of holding it's part of the cars weight. For example your car is 3800LBS. If the car has a perfect 50/50 weight disribution. Then each corner of the car would carry about 950lb. With that said. Lexus/Toyota and everyone else that makes springs. Has to make each spring hold that amount of load on any given spring. So you see some spring packages that say 18kg/mm. Thats how much weight they can carry/milimeter. So if your springs are rated for 950 and you cut 1 coil off your taking a fraction of the total amount of weight that the spring was supposed to handle. Why do you think when you get a set of Coil-Over your supposed to get the car corner balanced. You have to reset the weight balance from Left to Right. Front to Back. Sure your car looks good with cut springs. But your RIDE QUALITY will suffer@ the expense of looking good.
03-14-07, 12:04 PM
#13
Zombie Slayer
How would Cutting the springs make the Shock travel Increase ?
Cutting the springs add more problems then good. If you cut the spring, you take away the springs capability of holding it's part of the cars weight. For example your car is 3800LBS. If the car has a perfect 50/50 weight disribution. Then each corner of the car would carry about 950lb. With that said. Lexus/Toyota and everyone else that makes springs. Has to make each spring hold that amount of load on any given spring. So you see some spring packages that say 18kg/mm. Thats how much weight they can carry/milimeter. So if your springs are rated for 950 and you cut 1 coil off your taking a fraction of the total amount of weight that the spring was supposed to handle. Why do you think when you get a set of Coil-Over your supposed to get the car corner balanced. You have to reset the weight balance from Left to Right. Front to Back. Sure your car looks good with cut springs. But your RIDE QUALITY will suffer@ the expense of looking good.
Cutting the springs add more problems then good. If you cut the spring, you take away the springs capability of holding it's part of the cars weight. For example your car is 3800LBS. If the car has a perfect 50/50 weight disribution. Then each corner of the car would carry about 950lb. With that said. Lexus/Toyota and everyone else that makes springs. Has to make each spring hold that amount of load on any given spring. So you see some spring packages that say 18kg/mm. Thats how much weight they can carry/milimeter. So if your springs are rated for 950 and you cut 1 coil off your taking a fraction of the total amount of weight that the spring was supposed to handle. Why do you think when you get a set of Coil-Over your supposed to get the car corner balanced. You have to reset the weight balance from Left to Right. Front to Back. Sure your car looks good with cut springs. But your RIDE QUALITY will suffer@ the expense of looking good.
Now, after the cut, 100lbs of force compresses the spring 1" and 200lbs of force compresses the spring 2". Less force is needed for the same amount of spring travel........or greater spring travel with the same amount of force!
03-14-07, 08:48 PM
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MKORSU: Didn't know about the travel. Good to know. So next time i don't sound like an @ss. But if the spring is cut wouldn't you get less Dampener travel ? I mean your cutting the total height... So the Dampener will be a a lower resting position ? And wouldn't one be getting alot less travel then more ?
03-15-07, 10:27 AM
#15
Zombie Slayer
I think in the sense of bottuming out you are right. Total travel is decreased. But i think there would be more travel (bouncy feel) during regular operation.