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Author Topic:   test
maxwell
Member
posted March 04, 2004 11:13 AM
Does anybody know how to find the rating of a spring . Is it dia. x rung distance divided by the lenght . Can anyone help thanks

[This message has been edited by maxwell (edited March 04, 2004).]

NJantz
Member
posted March 04, 2004 11:27 AM
NJantz not following you if I have spring. And I what to tell someone the weight of if or close to the weight how would I do this. Thanks for your reply


ratracer10
Member
posted March 04, 2004 12:50 PM
Thanks a bunch NJantz ill try this tonite


Ego Racing
Member
posted March 04, 2004 03:19 PM
Maxwell.... Springs are rated at one inch of compression. Meaning you must compress the spring one inch then measure the weight needed, Then you need to compress it one mre inch and check the weight needed. Subtract the first weight from the second and you will have the rate. Keep in mind a typical spring that compresses 1 inch with 250 lbs can take 950 lbs to compress the next inch. 950-250=700lb spring. These numbers are right off of a spring checker so do not try this with out one as it would be next to impossable to hold 950lbs on the top of a spring by hand not to mention VERY VERY dangerous...!!!! Call around. Many chassis shops have spring raters and charge little or nothing for the service.


Ego Racing
Member
posted March 04, 2004 03:23 PM
NJANTZ... Spring rates are progressive. It is weather they are linnear or not as to if they get progressively stiffer. If not your idea would flatten a 200lb spring if you used a 200lb weight. You MUST preload the spring before you can rate it.


dirtracer14
Member
posted March 04, 2004 07:04 PM
Do you have a set of scales? If so ill tell ya a real good way to do it....also need a press! This is a very acurate way!!!


alias
Member
posted March 05, 2004 11:05 AM
What are you up to Maxwell??
Can't ya get that darn Hot Chassis to
turn? What you need is a new set up
man!! I have met your set up guy and
he is a bit goofy. I also saw him drive
your car one night at 105 he said your
car was fast enough to win, but he only
ran second. I would fire him!!!!!!!!!!

LOL

maxwell
Member
posted March 05, 2004 11:36 AM
Alias I have already fired my set up man his spring selection sux when i cant even turn a **** car on a dry slick track some thing is wrong with my set up man maybe he should come drive my car this weekend and see for his self how it will not enter a turn without pushing to the wall that is the only way my car will make around the corner bouncing off the wall to make it turn.i going to have to talk to my set up man and see if he will GIVE me a absortment of front springs to try


maxwell
Member
posted March 05, 2004 11:41 AM
Ego Racing: Thanks for the replyi have a friend that has a spring tester but lives far away i try getting a hold of him i sure thought there was a formual to figuring the spring rating i just cant remeber where i saw it


NJantz
Member
posted March 05, 2004 12:28 PM
You can do it mathmaticaly but it is only close. It may be right on but if the spring is of inferior materials it will be WAY WAY off. Check every spring checker 0on the market and they tell you to get it accurate you must perload the spring. I used to have an older spring that was a 550, when pluged into the formula it was a 548 (close enough) in reallity on the spring checker it was a 372 lb spring.
How bad would that have been to find on the track.
Just for your guys info I have seen several spring checkers sell on Ebay for $250 I bought one myself last year. It was used but I got it for under 100 bucks, I just had to buy a dial indicator and get the jack rebuilt. Total was like $190.


NJantz
Member
posted March 05, 2004 07:11 PM
thanks for all the info. Ego and NJanz


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