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How Do I Tell What My Spring Rates Are?

Sydneykid
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tacker Mentor

tacker

Posted
Posted (edited)

Hi SK,

Just back from Angola and have measured the springs as you suggested.

Front

top 118 od

bot 113 od

spring 14

coils 7 total

2 progressive coils

rear

top 113 od

bot 100 od

spring 13.5

coils 8 total

2 progressive coils.

Ps also found the front sway bar is broken not sure how long that has been like that and i guess would not be helping with the loose rear during mid corner.

King Regards

Edited by tacker
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Sydneykid Grand Master

Sydneykid

Posted
  • Author
Posted
Hi SK,

Just back from Angola and have measured the springs as you suggested.

Front

top 118 od

bot 113 od

spring 14

coils 7 total

2 progressive coils

rear

top 113 od

bot 100 od

spring 13.5

coils 8 total

2 progressive coils.

Ps also found the front sway bar is broken not sure how long that has been like that and i guess would not be helping with the loose rear during mid corner.

King Regards

Front is ~400 lbs per inch (7.1 kg /mm)

Rear is ~370 lbs per inch (6.6 kg/mm)

Yep, a broken front bar is not good for rear end stability.

:) cheers :laugh:

tacker Mentor

tacker

Posted
Posted

Cheers SK,

If your ever in this part of the world you have a night of free beers.

I am thinking that i still might need some softer springs in the rear, what would your recommend?

Regards

Sydneykid Grand Master

Sydneykid

Posted
  • Author
Posted
Hi SK,

I have some measurements here, hope you can help me out to figure the spring rates.

I.D: 90/79

O.D: 12

# : 6.650

Thanks SK :(

Sorry for the delay

270 lbs per inch (4.8 kg/mm)

:P Cheers :(

Sydneykid Grand Master

Sydneykid

Posted
  • Author
Posted (edited)
Hey sydneykid im getting new coilovers for my cefiro soon but would like to know what rates i have at the moment, these are the coilovers that it arrived in oz with, measurements are

front

coil OD - 85mm top and bottom

wire OD - 12mm

No of coils - 7.9

rear

coil OD - 85mm top and bottom

wire OD - 11mm

No of coils - 7.25

measurements taken on the car without verniers so may be a bit rough, thanks heaps

Sory for the delay, I missed this one.

Front is ~ 500 lbs per inch (8.9 kg/mm)

Rear is ~ 415 lbs per inch (7.4 kg/mm)

:P cheers :(

Edited by Sydneykid
Sydneykid Grand Master

Sydneykid

Posted
  • Author
Posted
Couple to calculate please -

1. Coil ID = 98/66 mm

Wire OD = 11.75 mm

# of Coils = 7.25 turns

2. Coil ID = 96/71 mm

Wire OD = 12 mm

# of Coils = 7.75 turns

Thanks

1. 235 lbs per inch (4.3 kg/mm)

2. 225 lbs per inch (4.0 kg/mm)

:) cheers :

Sydneykid Grand Master

Sydneykid

Posted
  • Author
Posted
Hi Gary,

Got some measurements...

front:

WD: 13.8mm (???)

ID: 155mm

turns: 4.75

rear:

WD: 11mm

ID: 80mm

turns 7.25

cheers

Ben

Front = 160 lbs per inch (2.8 kg/mm)

Rear = 200 lbs per inch (3.6 kg/mm)

:) cheers :D

  • 2 weeks later...
Beer Baron Grand Master

Beer Baron

Posted
Posted

Hi gary,

I've got one for you.

Rears:

coil OD 91mm

wire OD 13mm

coils 9.4

length (lightly captive) 247mm

Fronts:

coil OD 90mm

wire OD 13mm

coils 7.75

length (lightly captive) 190mm

thanks very much Gary.

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