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Author Topic:   cutting front coil springs
gould
Dirt Maniac

Total posts: 125
posted February 05, 2003 07:58 PM
whats the best way to do this. i got a few ideas but would like some input.

Gene
Dirt Freak

Total posts: 230
posted February 05, 2003 08:16 PM
chop saw

Hobbystocker
Dirt Full Roller

Total posts: 28
posted February 05, 2003 09:53 PM
buy new springs

Flatlander
Dirt Freak

Total posts: 310
posted February 05, 2003 09:55 PM
Agree with Gene use heat and the rates will change some

racer17j
Dirt Forum Champ
Total posts: 1565
posted February 05, 2003 10:13 PM UIN: 54865418
get a torch and chop um into about 4 pieces and order some real springs it's to hard to get an exact setup with stock cut springs

gould
Dirt Maniac

Total posts: 125
posted February 06, 2003 07:21 AM
they are afco springs, 5 1/2 x 12, they need to be 10 1/2

outlawstock17
Dirt Forum Champ
Total posts: 620
posted February 06, 2003 08:14 AM
a cut-off wheel on a die grinder works best. if you slip up with a chop saw, you could nick the spring somewhere you didn't want. by shortening the spring, you will increase the rate a little.

NYhick
Dirt Forum Racer

Total posts: 82
posted February 06, 2003 08:46 PM
check out Day motorsports, you can get 11" springs there. It sure beats cutting a spring and not knowing the rate. I have a 12" 1000# on rf and a 11" 800# on lf and have a good wedge with that.......

racer17j
Dirt Forum Champ
Total posts: 1565
posted February 07, 2003 12:08 AM UIN: 54865418
if they are racing springs somebody will buy them off you and get new ones cutting the coils off changes the rate like outlaw said

gould
Dirt Maniac

Total posts: 125
posted February 08, 2003 04:40 PM
it doesnt change the rate enough to worry about. a friend of mine told me to do it, his name is **** Gustin. thats a pretty good source of info. also nyhick, i would still have to cut the 11 inch springs to get 10 1/2.

Eljojo
Dirt Freak

Total posts: 273
posted February 08, 2003 07:16 PM
I've cut springs before, and what I do is put them in a five gallon bucket with water up to the point I wanna cut-well just below that-I like to cut them just a little bit long and then heat the very end and bend it just a little so that it sits in the pocket better. But that's just me.

Big Bear
Dirt Full Roller

Total posts: 50
posted March 12, 2003 08:20 PM
Accorcing to Bob Emmons"Building a street stock step by step" the formula you can use to calculate new spring weight after cutting a pair of springs is as follows...Desired height DIVIDED by Current height Then find the reciprical of your answer and MULTIPLY THIS answer by your begining spring rate. an example to help you understand if you need it... 14.5" spring with 500#/" spring rate you would like to cut down to 10" what will be the new spring rate? 10 DIVIDED BY 14.5=.689, reciprical of .689=1.45 TIMES 500= 725#/". Hope this helps you out. Big Bear

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RebelYell 10
Dirt Roller

Total posts: 12
posted March 13, 2003 09:51 AM
Or, for those who have issues with reciprocals...

Current height divided by Desired height, than multiply that by the original rate.

Ex.: Original height of 14.5 divided by desired height of 10 = 1.45 times the original weight of 500 is a new rate of 725 pounds.

hobby9
Dirt Newbie

Total posts: 2
posted March 13, 2003 12:25 PM
I bought the same springs and cut 1 coil off and have never had a problem. **** I used a torch just because it was faster, but I would suggest using a cut-off wheel if available. I havent removed those springs since I put them in before the start of the season last year about 70+ races ago and my car handles perfectly.

J.West
Hobby#9

Big Bear
Dirt Full Roller

Total posts: 50
posted March 13, 2003 04:14 PM
Never thought of doin the math the Hillbilly way. Thanks for the insight


Big Bear (hillbilly)
Brakes are for P***ys

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[This message has been edited by Big Bear (edited March 13, 2003).]

superdave
Dirt Forum Racer

Total posts: 89
posted March 13, 2003 08:45 PM
If you use the torch just stand it up in a bucket of water up to where you want to cut it off. The takes the heat out directy below the cut.

Good luck,

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Superdave
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jnewman44
Dirt Full Roller

Total posts: 72
posted March 13, 2003 10:17 PM
Look at circletrack.com in the tech articles, Famous chassis tuner Herb Adams says use a torch, let them air cool , don't quench them, and bend the end in. Trimming coils by 1/2 a coil will increase the rate approx. 10%. Good Luck

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