How Do I Tell What My Spring Rates Are?

[R32Abuser]

Bah. Completely forgot last night and didn't have enough time anyway

Setting an alarm now for when i get home.

Cheers,

David

[TrikkBen]

REMINDER!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[R32Abuser]

Sorry it has taken this long!

Results are:

2.85 kg/mm or ~ 160 lb/in

Bare in mind i have used an average of your upper and lower OD's. Although this isnt 100% accurate, it will be in the vacinity of the correct value.

From what I've read, these seem like stock rates. How does it ride and handle?

[TrikkBen]

Don't want to be rude mate, but these are not stock rates... My mate drift GTST32 is about as hard as mine, thing rides like track spec springs and I believe it handles insane, but I haven't driven another to compare. It would be very uncomfy as a daily, you can not physically push the car down at a corner at all, not even bounce it?

Any Ideas? Thanks for taking the time mate.

Ben

Edited February 10, 2012 by TrikkBen

[R32Abuser]

All good...Im simply using the values you gave me.

For comparison, the first 5-10 rates that are in this thread that Sydney Kid calculated I also calculated using my spreadsheet. All were pretty much on spot +/- 5% IIRC. Furthermore, I calc'd my own spring rates and they were pretty much spot on with what I was given from SK. So I dont believe there's a problem with the spreadsheet...

Ill take another look when I get home and re-calc everything. But when I did calculate them, I checked and re-checked the values as I was a tad surprised going off the pictures.

[OUTATIME]

Fronts:

13mm

Od= 75mm

Turns= 6.75

Rears:

12.5

Od= 76mm

Turns= 8

First and last coils r tapered off to make the spring sit flat. If that changes things.

Cheers

[bang]

hey sk,

could I please get the spring rates for these:

Fronts:

Coil ID = 88/79

Wire OD = 25.5

# of Coils = 8.8

Rears:

Coil ID = 100/68

Wire OD = 23.5

# of Coils = 9.5

thanks!

[sydking]

If i take measurements of my springs, Front and rear could someone please try and see what spring rate they are, Aftermarket shocks on Cusco Zero 2 R. If to firm would like to change before the install.

[dori34]

hey R32Abuser. (or anyone in here) can you help calculate spring rates for me?

front:

Coil ID = 14.7cm

Wire OD = 1.8cm

# of Coils = 5

rear:

Coil ID = 7.6cm/6.4cm

Wire OD = 1.4cm

# of Coils = 7

Appreciate the help.

Cheers!

[rondofj]

Hi SydneyKid or anyone else, could you please help calculate the (rear only) spring rates of my older model Cusco adjustable coilovers. They are really hard and I want to change springs.

Spring outer dia : about 90mm

Spring coil dia: 15mm

No. of coils: about 7.8? (the bottom of the last coil is sort of a 'split half diameter coil' - see pic)

Please disregard the lower 'helper springs'.

Thanks Ron

[rondofj]

Hi SydneyKid or anyone else, could you please help calculate the (rear only) spring rates of my older model Cusco adjustable coilovers. They are really hard and I want to change springs.

Spring outer dia : about 90mm

Spring coil dia: 15mm

No. of coils: about 7.8? (the bottom of the last coil is sort of a 'split half diameter coil' - see pic)

Please disregard the lower 'helper springs'.

Thanks Ron

[rondofj]

Oops sorry forgot the pic, here it is..

[sydking]

Oops sorry forgot the pic, here it is..

Hey mate i have the same ones im quite sure, They are Cusco Zero 2R - I was told the spring rates are 16/18 wayyyy to high

[rondofj]

Thanks mate its not Zero2R, theres no damper adjustment, could be a Zero1, its baaaaad, 18/16 sounds plain horrible when Im told even 8/6 is bad! Oh boy here I was wanting to put softer 6/5 or 6/4 springs in.. Would my dampers get rooted with this low a rate?

[rondofj]

Ok so got verniers today for extra accuracy.

Spring wire dia is 12.5mm

Spring outer dia is 89-90mm

No of 'active' coils is 6

Spring rate from a couple of US sites is 9kg/mm and thats for the rear- f**king hard hehe

[IT15ON]

Hi Gary and others,

I have an S13 silvia with RB25DET conversion. It came with Racing Logic coilovers installed, can you please help me work out spring rate?

This is from the rear:

Coil OD = 84mm

Wire OD = 11mm

# of coils = 6.9

It was sitting very low and was terrible for street, (physical pain on large pothole at 60km/h)! I have adjusted the height up and it is a little better, but still pretty rough on the street.

It still has all rubber bushes too not sure if this makes a difference.

Thanks for your help.

[Don Dada]

Has anyone find any online calculator or link to get proper results?

[SiR_RB]

Bumping thread from ages ago but does anyone know any calculators to determine spring rates entering the spring information ?

[jasonochs25]

man oh man...old old thread. BUT I have to ask...I have a couple springs I need help identifying.

 

14" spring front

Coil ID =  65mm

Coil OD= 85mm

Wire OD = 9.7mm

# of Coils =  10?turns

 

12" spring front

Coil ID =  65mm

Wire OD =  9.5mm

# of Coils =  7.75/turns

 

10" spring rear

Coil ID = 65.5 mm

Wire OD =  9.5mm

# of Coils =  5turns

 

I hope that the OP is still doing this!!! I need to figure out these springs and if they wont work for my application I need to order new. Please help!

 

Thanks in advance!!!