cutting springs
cutting springs
i know cutting stock springs isnt the smartest idea but i have eibach spirings and i want a lil more drop.. i heard that u can cut after market springs and not lose performance in handling. true or false
Cut one complete coil off. If you have Eibach pro kit springs all you will lose is a lil initial plushness it makes it ride a bit firmer all the time. Don't listen to these poseurs cutting a spring when done correctly is fine.
ignorant comment.I guess Chip Foose is an idiot.Like i said.ive been on cut springs since ive been driving and have never had problems with em on any vehicle.My car sits lower than sportlines(way lower) and rides better than sportlines.
if dont correctly doesnt pose any harm
for example
i had a 2004 ford ranger that i didnt want to cut the springs cause i had the same mentality that it would hurt the truck somehow. So i ended up getting springs, fine worked out, but the passenger side had a bigger gap than every other tire, so i was like WTF?? reisntalled same problem.
So then i bought the upper and lower controls arms to fix this, again doing things the right way. After 8 hours of work STILL the same ****. I dealt with it for a while and what not but then it started to really bother me again. So i cut that spring, a coil to be exct. Fixed the problem
Moral of story cutting springs arent that bad, and i wasted 1300 dollars in suspension parts.
for example
i had a 2004 ford ranger that i didnt want to cut the springs cause i had the same mentality that it would hurt the truck somehow. So i ended up getting springs, fine worked out, but the passenger side had a bigger gap than every other tire, so i was like WTF?? reisntalled same problem.
So then i bought the upper and lower controls arms to fix this, again doing things the right way. After 8 hours of work STILL the same ****. I dealt with it for a while and what not but then it started to really bother me again. So i cut that spring, a coil to be exct. Fixed the problem
Moral of story cutting springs arent that bad, and i wasted 1300 dollars in suspension parts.
I ran two different sets of cut springs on my talon when I had it. First set I cut off with a cutting torch. Car set pretty good but rode like an absolute bag of ****. So I went and picked up two more sets of stock springs(one set to cut again, another set just in case.) I cut my second set with a hack saw to keep down on heat. They set the same as the first set, but I didn't find any loss in ride quality. I didn't auto x or anything, but around town and when driving a little bit spirited they rode just fine. Just make sure you don't get the springs too hot and make sure you cut the same amount off each pair(i.e front left and right the same length as each other.) Front to back doesn't necessarily have to be the same.
alright so i can just cut with a hack saw ? anyone have a pic with eibach springs cut ?
and did u use a camber kit ?
and did u use a camber kit ?
Last edited by *S!CC_R@c!NG_TURTL3*; Sep 23, 2009 at 06:33 PM. Reason: Automerged Doublepost
I've rode in a couple cars with Eibach springs and really I don't find any difference in performance over stock suspension, they just sit lower. Why shell out $300+ for Eibach's when your just going to cut them? If your gonna cut springs just cut your stockers and sell the Eibach's IMO.
maybe ill cut the stocker and see how it wrks out and if it come out gud ill cut the sportlines if it sucks ill just them back on
yea pics would be awesome
yea pics would be awesome
Last edited by *S!CC_R@c!NG_TURTL3*; Sep 23, 2009 at 06:41 PM. Reason: Automerged Doublepost
No like I said I had my alignment checked and camber was a bit negative bit still within spec.I didnt measure so im not too sure.I just went off looks
Dont cut the stockers.They WILL ride like ****
Dont cut the stockers.They WILL ride like ****
Last edited by FASTL61; Sep 23, 2009 at 06:45 PM. Reason: Automerged Doublepost
I found this on a quick google search, I checked the math and confirmed it with my engenier friends this is all true. See http://www.eatonsprings.com/atqCutti...lculations.htm
""Popular wisdom" rules. Cutting coils does increase the spring rate. Let me explain why.
The strength of a spring, leaf or coil is a function of the cube of the steel used. Keeping with the subject of your question, coil springs, the diameter of the wire and the length of the wire will give us the amount of steel used.
For this whole discussion we will be talking about springs with the same wire diameter and the same inside diameter. The only thing that will change will be the length of the wire used to wind the spring.
The longer the wire is the lower the spring rate. As the wire get shorter, such as when cutting the coil, the spring rate increases.
So everyone has a clear understanding lets describe what "rate" is. Rate is the amount of weight it takes to deflect a spring one-inch.
A very common mistake is to think that spring rate is how much a spring supports. How much weight a spring is designed to support is called "Load" or "Designed Load" or"Load Rate". This is cover in Spring Tech 101.
Rate and Load Rate are two totally different animals.
The calculation to find the rate of a coil spring is:
11,250,000 times the wire diameter to the 4th power divided by 8 times the active number of turns times the mean diameter cubed.
Active turns are the number of turns of the spring that do not touch anything. Any part of the coil which makes contact with anything becomes inactive, that is it no longer functions as part of the spring.
The mean diameter is the inside coil diameter plus one wire thickness. Or the outside coil diameter less one wire thickness.
Let's say for example a 1967 Mustang GT front spring is made from .610 wire and has an inside diameter of 3.875" and has a free height of16.145" (not installed) and is deflected down to 10.5" (load height) when loaded to 1,519 lbs. (load rate) This spring has a spring rate of 269 lbs.
This spring has 9.33 total coils but 1.33 coils touch the spring seat so they are inactive leaving 8 active turns. (I know this from the Ford blue print).
The mean diameter is 3.875 + .610 (The inside is the important diameter because it is the inside of the spring which is used to locate the spring on the corresponding suspension parts. The outside diameter is not considered because it will change with a change of wire diameter)
Do the math-
11,250,000 x (.610 x .610 x .610 x .610) / 8 x 8 active turns x (4.485 x 4.485 x 4.485) = 269 lbs.
Double check the math - 16.145 - 10.5 = 5.645 deflection. 1,519/5.645 = 269
Now if we cut say 1/2 turn off this spring the active turns become 7.5.
So 11,250,000 x (.610 x .610 x .610 x .610) / 8 x 7.5 x (4.485 x 4.485 x 4.485) = 287 lbs.
While the rate is increased the load is unchanged. Rate is the amount of weight required to deflect the spring one-inch while load is the amount of weight the spring will support at a given height.
Cutting coils is limited to those types which have tangential ends. Tangential ends are those which spiral off into space. If you tried to stand the spring on end it would fall over.
Square ends and pigtail ends, both will stand up, and can not be cut because the finished product will not mount correctly in the suspension.
See this tech question on Cutting Coil Springs for a more complete explanation.
When altering ride height one must be aware of much more than just the springs. Brake lines, steering, shock length and other areas of interference. We do not offer coil springs which will alter any ride height more than 2-inches. Nor do we recommend anyone alter the ride height more than 2-inches.
While we have all sorts of springs which will vary ride height, spring rates and ride quality on the shelf, cutting coils maybe, in some cases, the only way to achieve the desired stance one is looking for."
""Popular wisdom" rules. Cutting coils does increase the spring rate. Let me explain why.
The strength of a spring, leaf or coil is a function of the cube of the steel used. Keeping with the subject of your question, coil springs, the diameter of the wire and the length of the wire will give us the amount of steel used.
For this whole discussion we will be talking about springs with the same wire diameter and the same inside diameter. The only thing that will change will be the length of the wire used to wind the spring.
The longer the wire is the lower the spring rate. As the wire get shorter, such as when cutting the coil, the spring rate increases.
So everyone has a clear understanding lets describe what "rate" is. Rate is the amount of weight it takes to deflect a spring one-inch.
A very common mistake is to think that spring rate is how much a spring supports. How much weight a spring is designed to support is called "Load" or "Designed Load" or"Load Rate". This is cover in Spring Tech 101.
Rate and Load Rate are two totally different animals.
The calculation to find the rate of a coil spring is:
11,250,000 times the wire diameter to the 4th power divided by 8 times the active number of turns times the mean diameter cubed.
Active turns are the number of turns of the spring that do not touch anything. Any part of the coil which makes contact with anything becomes inactive, that is it no longer functions as part of the spring.
The mean diameter is the inside coil diameter plus one wire thickness. Or the outside coil diameter less one wire thickness.
Let's say for example a 1967 Mustang GT front spring is made from .610 wire and has an inside diameter of 3.875" and has a free height of16.145" (not installed) and is deflected down to 10.5" (load height) when loaded to 1,519 lbs. (load rate) This spring has a spring rate of 269 lbs.
This spring has 9.33 total coils but 1.33 coils touch the spring seat so they are inactive leaving 8 active turns. (I know this from the Ford blue print).
The mean diameter is 3.875 + .610 (The inside is the important diameter because it is the inside of the spring which is used to locate the spring on the corresponding suspension parts. The outside diameter is not considered because it will change with a change of wire diameter)
Do the math-
11,250,000 x (.610 x .610 x .610 x .610) / 8 x 8 active turns x (4.485 x 4.485 x 4.485) = 269 lbs.
Double check the math - 16.145 - 10.5 = 5.645 deflection. 1,519/5.645 = 269
Now if we cut say 1/2 turn off this spring the active turns become 7.5.
So 11,250,000 x (.610 x .610 x .610 x .610) / 8 x 7.5 x (4.485 x 4.485 x 4.485) = 287 lbs.
While the rate is increased the load is unchanged. Rate is the amount of weight required to deflect the spring one-inch while load is the amount of weight the spring will support at a given height.
Cutting coils is limited to those types which have tangential ends. Tangential ends are those which spiral off into space. If you tried to stand the spring on end it would fall over.
Square ends and pigtail ends, both will stand up, and can not be cut because the finished product will not mount correctly in the suspension.
See this tech question on Cutting Coil Springs for a more complete explanation.
When altering ride height one must be aware of much more than just the springs. Brake lines, steering, shock length and other areas of interference. We do not offer coil springs which will alter any ride height more than 2-inches. Nor do we recommend anyone alter the ride height more than 2-inches.
While we have all sorts of springs which will vary ride height, spring rates and ride quality on the shelf, cutting coils maybe, in some cases, the only way to achieve the desired stance one is looking for."
The car will look cool when you are not moving but when you are driving around you will bounce like a pogo stick. I would save up for some bags for the slammed look especially because from you picks you look like you like that look.
cutting with a hack saw will take a long time. use a band saw. cutting eibachs is an issue. If you cut the lower springs that coil bind it will make no difference. as they coil bind. If you cut more than one coil off the upper spring coils, you aint got much spring left that will work. Its sort of a ghetto mod but I have cut stock springs, no problems. i would recommend you go to H&R springs and sell ur eibachs so it would be better all round, H&R drop more than the rest afaik....



