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How Do I Tell What My Spring Rates Are?

Sydneykid
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Sydneykid Grand Master

Sydneykid

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Can you knock these out for me, measurements may be off a touch as did them with shocks still on car & there was minimum room...

Note: springs are progressive, top 5 coils are wound tight, others are normal.

Fronts

Lower O.D. = 89.3mm

Upper O.D. = 89.3mm

Wire thickness = 12mm

No. Coils = 11.125

270 lbs/inch (4.8kg/mm)

Rears

Lower O.D. = 85.6mm

Upper O.D. = 87mm

Wire thickness = 11mm

No. Coils = 11.125

210 lbs/inch (3.7kg/mm)

thanks heaps!

Cheers

Gary

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lidz Community Regular

lidz

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Cheers

Gary

wow, ok I think I've stuffed up a measurement then because mine are rock hard & those spring rates are close to stock (z32).

Im assuming the springs are progressive as the top coils are wound a lot closer than the rest but perhaps Im wrong, any suggestions where I've messed up?

Coilovers are HKS Hipermax's & from what I can tell the lowest rates available (across whole range for z32) where fr=7, rr=6.

cheers, tim

Sydneykid Grand Master

Sydneykid

Posted
  • Author
Posted
wow, ok I think I've stuffed up a measurement then because mine are rock hard & those spring rates are close to stock (z32).

Im assuming the springs are progressive as the top coils are wound a lot closer than the rest but perhaps Im wrong, any suggestions where I've messed up?

Coilovers are HKS Hipermax's & from what I can tell the lowest rates available (across whole range for z32) where fr=7, rr=6.

cheers, tim

Can you post a picture Tim? That may show me what the progression is.

Otherwise you will have to measure the gaps between the coils. They should measure something like this,

3 mm / 5 mm / 5 mm / 5 mm / 15 mm / 20 mm / 20 mm / 20 mm / 20 mm /15 mm / 3 mm

Cheers

Gary

lidz Community Regular

lidz

Posted
Posted
Can you post a picture Tim? That may show me what the progression is.

Otherwise you will have to measure the gaps between the coils. They should measure something like this,

3 mm / 5 mm / 5 mm / 5 mm / 15 mm / 20 mm / 20 mm / 20 mm / 20 mm /15 mm / 3 mm

Cheers

Gary

yeah no problem, will double check measurements & snap some photos over the weekend.

thanks again.

Trust33 Grand Master

Trust33

Posted
Posted

this is rough but here it is for front springs hks hyper d's.

there are a few larger progressive rate coils nearer the top all wound in the one coil. there are 3 of them. Coil ID is 1)66mm 2)71mm 3)66mm

Coil ID = 61/61 mm

Wire OD = 12 mm

# of Coils = 10

could you work this out for me Gary.

Cheers!

lidz Community Regular

lidz

Posted
Posted
Can you post a picture Tim? That may show me what the progression is.

Ok Gary heres a couple photos with spacing included on them.

Fronts:

Coil Dia. = 12mm

Top/Bottom O.D. = 89.5mm/89.5mm

No. of Coils = 11.125 (about half of the last coil is shaved so that spring sits flat)

post-32210-1216761890_thumb.jpg

Rears:

Coil Dia. = 11mm

Top/Bottom O.D. = 86.7mm/87.7mm

No. of Coils = 11.125 (about half of the last coil is shaved so that spring sits flat)

post-32210-1216761902_thumb.jpg

Have included Dia. of every coil on the rears as the change was more noticable, can get the fronts too if need be.

thanks for the help.

cheers, tim

Sydneykid Grand Master

Sydneykid

Posted
  • Author
Posted
Ok Gary heres a couple photos with spacing included on them.

Fronts:

Coil Dia. = 12mm

Top/Bottom O.D. = 89.5mm/89.5mm

No. of Coils = 11.125 (about half of the last coil is shaved so that spring sits flat)

640 lbs/inch (11.5kg/mm)

post-32210-1216761890_thumb.jpg

Rears:

Coil Dia. = 11mm

Top/Bottom O.D. = 86.7mm/87.7mm

No. of Coils = 11.125 (about half of the last coil is shaved so that spring sits flat)

475 lbs/inch (8.5kg/mm)

post-32210-1216761902_thumb.jpg

Have included Dia. of every coil on the rears as the change was more noticable, can get the fronts too if need be.

thanks for the help.

cheers, tim

Sydneykid Grand Master

Sydneykid

Posted
  • Author
Posted
this is rough but here it is for front springs hks hyper d's.

there are a few larger progressive rate coils nearer the top all wound in the one coil. there are 3 of them. Coil ID is 1)66mm 2)71mm 3)66mm

Coil ID = 61/61 mm

Wire OD = 12 mm

# of Coils = 10

could you work this out for me Gary.

Cheers!

Assuming 7 active coils (3 progressive)

580 lbs/inch (10.3kg/mm)

Cheers

Gary

__PhaseShiftDown Rising Star

__PhaseShiftDown

Posted
Posted

Front Coil

========

Upper OD = 113.95

Lower OD = 108.25

# of Coils = 9.25

Wire OD = 12.85

Rear Coil

=======

Upper OD = 125.00

Lower OD = 112.25

# of Coils = 5.25

Wire OD = 13.7

Thanks. :-)

Sydneykid Grand Master

Sydneykid

Posted
  • Author
Posted
Front Coil

========

Upper OD = 113.95

Lower OD = 108.25

# of Coils = 9.25

Wire OD = 12.85

150 lbs/inch (2.7kg/mm)

I assume it's progressive wound, to get the correct effective rate you need to count the number of active coils, there will be around 4 to 5 coils that are inactive once the weight of the car is applied.

Rear Coil

=======

Upper OD = 125.00

Lower OD = 112.25

# of Coils = 5.25

Wire OD = 13.7

350 lbs/inch (6.3kg/mm)

Thanks. :-)

Cheers

Gary

Sydneykid Grand Master

Sydneykid

Posted
  • Author
Posted
SYDNEY KID CAN YOU CONTACT ME !!! YOU`VE SENT ME THE WRONG SUSPENSION KIT. I HAVE R34 NOT R33. STOP IGONRING ME PLEASE.

Nobody is ignoring you. We get 40 to 50 PM's and emails a day, sometimes I have to actually do some work so I don't get to answer every PM and email every day. But I can assure you every single PM and every single email gets answered in the order in which we receive them. Sticking posts in innapropriate threads won't help you jump the que.

Cheers

Gary

Sydneykid Grand Master

Sydneykid

Posted
  • Author
Posted
top: 115mm

bottom: 75mm

# of coils: 9 and a bit

wire: 14mm

thanks

230 lbs/inch (4.1kg/mm)

If they are rears then they are most likely progressive, like this

http://www.skylinesaustralia.com/forums/up...61890_thumb.jpg

If yours are like that, then you need to tell me how many coils are close together, they are inactive coils. To work out the real spring rate I need to know the number of active coils.

Cheers

Gary

  • 3 weeks later...
INXILE Enthusiast

INXILE

Posted
Posted

Coil OD = 125/100 mm

Wire OD = 14 mm

# of Coils = 7.5 turns

Coil OD = 110/90 mm

Wire OD = 13 mm

# of Coils = 7.125 turns

Coil OD = 125 mm

Wire OD = 15 mm

# of Coils = 9 turns

Coil ID = 65 mm

Wire OD = 13 mm

# of Coils = 6.75 turns

NB. 3 ODs and 1 ID

Can i please get them in KGmm and Lb"

Thanks Heaps

James

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