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Discussion Starter · #1 · (Edited)
I originally made this post in another thread and I thought I'd make this into its own thread for the benefit of everyone in the forum, so the information didn't get lost in the backwaters of some other thread. Enjoy. :)

Yes, you can cut coil springs with no ill effect, in fact the results are superior to the marketing spiel lowering springs. I don't mean to step on anyone's toes that likes their lowering springs, just stating facts. If you enjoy your lowering springs, more power to you.

As with anything there is a right way and a wrong way to do things. If you do it the wrong way, yes of course it's not a good idea. Just like if you try to rebuild your engine but you've never ever rebuilt one before or have the slightest clue what you are doing, the results will be not be good. However, that doesn't mean rebuilding engines is a bad idea, does it? Of course not. The same goes with cutting coil springs. I knew someone that almost drowned while swimming, but does that mean swimming is a bad idea? Of course not. Again, there's a right way and a wrong way.

There is a suspension engineer named Herb Adams who developed the Pontiac Trans AM WS6 high performance suspension package for Pontiac. In other words, this engineer knows what he is doing. Herb has been cutting coil springs for years with great success. His high performance suspension company, "Herb Adams VSE", located in Carmel, C.A., cuts coil springs for their customers too. Herb wrote a book called, "Chassis Engineering", where he discusses cutting coil springs. His race cars have competed in the 24 Hours of Datyona race and other races. If a race car doing over 150 mph for 24 hours straight doesn't have a problem with coil springs that have been cut, then it only stands to reason that your street car puttering around town wont either.

I have a suspension book from Herb Adams that details how to correctly cut coil springs, but I have recently moved and this book is somewhere in storage with thousands of my other books. However, below is a link to a BMW forum discussing this very topic and how to correctly cut coil springs per Herb Adams. You will note that forum members are admitting they stand corrected and correctly cutting coil springs has no detrimental effects -

http://forums.bimmerforums.com/forum/showthread.php?t=1147678&highlight=metric+mechanic+cutting+coil

If it will make you feel better after you cut the coil springs, you can paint them any color you wish to make them look new. A correctly cut set of coil springs will actually be superior to new lowering springs because the springs you have in your vehicle currently have already settled.

As Herb Adams advises, save your money on lowering springs and simply use the springs you currently have. :)

-- B.F. Goodrich T/A Certified Tire Specialist
 

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you gotta post this thread in css.net

theres a suspension ass over there who thinks different
 

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Discussion Starter · #3 ·
you gotta post this thread in css.net

theres a suspension ass over there who thinks different
Nah, I don't feel like arguing with someone who thinks they know it all. :) I don't either, but I know from years of S.C.C.A. racing, personal experience and the seal of approval from a highly respected suspension engineer and author, Herb Adams, that for lowering a car and improving its handling by lowering its center of gravity, that cutting coil springs is the way to go. :)
 

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Hmmmm. I still like getting higher rates from after market springs. Also if you're on a tight budget, and are making a purely show car, cutting the springs, to me, isn't a bad idea. However I wouldn't do it for performance.
 

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Hmmmm. I still like getting higher rates from after market springs. Also if you're on a tight budget, and are making a purely show car, cutting the springs, to me, isn't a bad idea. However I wouldn't do it for performance.
Snakes for real. Im with him.

As you can see, lobalt, being all show, has cut her springs.
Then you look at someone who is all performance, with springs or coilovers.
 

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Discussion Starter · #10 ·
Hmmmm. I still like getting higher rates from after market springs. Also if you're on a tight budget, and are making a purely show car, cutting the springs, to me, isn't a bad idea. However I wouldn't do it for performance.
Higher rate/stiffer springs can reduce handling. The secret is to use softer springs with bigger anti-sway bars for the best handling.

Read the BMW thread about this and you'll learn it is the way to go for performance/handling.
 

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Discussion Starter · #11 ·
For me, my Eibach Sportlines are coming tomorrow! So Im super pumped.
Installing them Friday!

I love birthdays! :)
Anytime you change a suspension component, be it tie rod ends, MacPherson struts, or coil springs, be sure to have the vehicle re-aligned with a computerized four wheel alignment machine. Doing this will save you from burning off tires and having to spend money on new tires.
 

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Discussion Starter · #12 ·
Snakes for real. Im with him.

As you can see, lobalt, being all show, has cut her springs.
Then you look at someone who is all performance, with springs or coilovers.
Nothing wrong with cutting springs. Saves money on un-needed lowering springs and delivers superior results.
 

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Anytime you change a suspension component, be it tie rod ends, MacPherson struts, or coil springs, be sure to have the vehicle re-aligned with a computerized four wheel alignment machine. Doing this will save you from burning off tires and having to spend money on new tires.
I plan on getting an alignment afterwards.
Thank your for your knowledge!
We can always use an extra brain on here! lol :)
 

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Discussion Starter · #14 · (Edited)
I plan on getting an alignment afterwards.
Thank your for your knowledge!
We can always use an extra brain on here! lol :)
Glad to be of help. Be certain you have a four wheel alignment done and not just a front wheel alignment. There are alignment adjustments in the rear suspension as well as the front and if you only did the front, (as some incompetent auto centers will tell you to do), it's literally a half-ass job, the vehicle is not aligned and will still wear out tires from being out of alignment. It would be like doing a, "tune up", on a four cylinder engine and only replacing two spark plugs. Any auto center/garage that is only recommending a front end alignment with a modern car is either A. Totally incompetent. B. Doesn't have a modern computerized four wheel alignment machine, or C. Both A and B!

Request/demand a printout of the before and after alignment settings so you are certain the alignment was done correctly. If you don't, you're not sure if the car has actually been aligned correctly or not and you wont know until your tires are burned off. Of course by then, it's too late and the incompetent auto center that did this to you wont buy your new tires! Call around for prices and to be sure that wherever you go for the alignment has a functioning printer for their computerized alignment machine. You must ask, or when you arrive and request/demand this, it is not at all uncommon to get excuses like, "Oh....umm....it's broken"....or, "Well...err...it's out of paper", etc. You can't trust or want an auto center like that aligning your car! Be careful.
 

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Thank you John Adams!!!!!

I've been saying this foooorrreeevvverrr when these (not on this site, just saying 'these' as a general term) people always rag on me for havin cut springs, i didnt learn all this from a forum (nothin wrong w/ that tho), me & my friends have been doin this stuff for a while... i always tell ppl, if ur car is a show car, lowrider, (like mine) whatever, then cut the springs if u want... but if u want performance & a slight drop, buy springs, coilovers... ive bought springs in the past & i hated them-not low enough, so i cut my lowering springs, haha...

I'm about to take off prob about a quarter turn off my front springs to set it down some more, might do the back-just a little less than that cuz the car is already sittin @ a calirake'd angle, so i hope to fix that soon... just w/ cuttin springs all cars are different & the springs have to be cut differently... gosh, the rear end in a 3rd generation Mitsubishi Eclipse GT is a PAIIIIN! but the Scion tC was suuuper easy...lol... although i dont personally cut my springs myself, my best friend does & i help... my next big suspension step shall be BAGS... lol
 
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