How Do I Tell What My Spring Rates Are?

[?UESTLOVE]

Hi Syd..

Can i get these please??

FRont Coil:

Thickness 11.6

No of coils: 6

OD Top: 140mm

OD Bottom: 140mm

Rear:

Thickness: 13.9

No Of coils: 8

OD Top: 115mm

OD Bottom: 145mm

Cheers!

[Simonster]

Hi Gary

These were the stiff Teins I've just taken out and replaced with your kit.

Front

ID 98mm/70mm

Thickness 16mm

Turns 7.6

Rear

ID 88mm/71mm

Thickness 14mm

turns 7.7

Cheers

Simon

[Sydneykid]

I have two sets of springs for you to check out please.

First set:

Front: Coil ID: 116mm

Wire OD: 13mm

# of coils: 6.5------------------160 lbs/inch (2.9kg/mm)

Rear: Coil ID: 90mm

Wire OD: 13mm

# of coils: 8.125---------------230 lbs/inch (4.1kg/mm)

second set:

Front: Coil ID: top 103mm - bottom 106mm

Wire OD: 12mm

# of coils: 6.5-----------------160 lbs/inch (2.9kg/mm)

Rear: Coil ID: top 70mm - bottom 65mm (this spring starts small, tapers out, then tapers in again)

Wire OD: 12mm

# of coils: 8.8------------------What car is this out of? Is it a beehive shape? What is the maximum ID?

I appreciate your time. Hope to hear from you soon.

Regards,

Beau

[Sydneykid]

Hi Syd..

Can i get these please??

FRont Coil:

Thickness 11.6

No of coils: 6

OD Top: 140mm

OD Bottom: 140mm----------------120lbs/inch (2.1kg/mm)

You might want to check the wire OD again, I have never seen 11.6 mm wire.

Rear:

Thickness: 13.9

No Of coils: 8

OD Top: 115mm

OD Bottom: 145mm----------------160lbs/inch (2.8kg/mm)

I used 14 mm as there is no 13.9 mm wire.

Cheers!

[Sydneykid]

Hi Gary

These were the stiff Teins I've just taken out and replaced with your kit.

Front

ID 98mm/70mm

Thickness 16mm

Turns 7.6----------------635lbs/inch (11.3kg/mm)

Rear

ID 88mm/71mm

Thickness 14mm

turns 7.7----------------450lbs/inch (8.0kg/mm)

Cheers

Simon

They would have given a nice ride and good handling :laughing-smiley-014: :laughing-smiley-014: :laughing-smiley-014:

[insanity]

Thanks for your help so far Gary,

For some reason I couldn't 'reply' as normal, so I just made this new post.

First set are HR30 skyline springs.

second set are for Toyota Echo.

Max OD is ~108mm for the Echo rear springs, and yeah, its somewhat of a beehive shape.

Thanks again,

Beau

Edited January 25, 2007 by insanity

[trivial]

hey Sydneykid..

just got rears for now but...

lower OD-100mm

upper OD-95mm

Wire - 12mm

Coils 11

Didn't take the springs off the car =P

[Sydneykid]

hey Sydneykid..

just got rears for now but...

lower OD-100mm

upper OD-95mm

Wire - 12mm

Coils 11

Didn't take the springs off the car =P

200 lbs/inch (3.6 kg/mm)

cheers

[EdGTR]

Hi Sk Great thread you got here Helping out alot of people.

Just a quick question, ive got a r32 gtr and havnt been able to find out what the standard rates are? I am very interested in the difference f to r. Also what rates and brands would you recommend for a car that is going to see around 6 track days a year and a bit of road driving?

It might also be good if people listed what type of car their springs were going to go in.

Thank for your time

[Sydneykid]

Hi Sk Great thread you got here Helping out alot of people.

Just a quick question, ive got a r32 gtr and havnt been able to find out what the standard rates are? I am very interested in the difference f to r. Also what rates and brands would you recommend for a car that is going to see around 6 track days a year and a bit of road driving?

It might also be good if people listed what type of car their springs were going to go in.

Thank for your time

Standard is around 165 lbs/inch (3kg/mm)

There is no real need to get carried away with huge springs rates.

You should really check out the R32GTR Group Buy. The Group Buy kit was engineered (by me) to give a sporty ride for the street and at the same time suite the sorts of things that Skyline owners use their cars for (road drag and circuit). It a great all round kit and I have not included anything that I don’t think needs to be there. Everything has a purpose and contributes to the all round ability of the kit. For example the R33GTST that won the NSW State Speed Event Championship in 2005 used basically this kit. It was driven from the north coast of NSW to Sydney for the events, raced and then driven the 400 k's home.

The Group Buy Bilsteins have additional circlip grooves added so you can set the height you want before you fit them. There are 6 grooves 8 mm apart and I can tell you the height that you will get from each groove. Keep in mind that GTR's handle best around 355 mm front and 345 mm rear (centre of wheel to guard).

cheers

[sav man]

Front:

Coil OD = 120/98mm

Wire OD = 13 mm

# of Coils = 9 turns

Rear:

Coil OD = 113/107mm

Wire OD = 13 mm

# of Coils = 10 turns

[Sydneykid]

Sorry for the delay, our local area got hit by the lightening in last week's storm and our internet connections are down. Telstra says it might be next Tuesday until we have service restored. I have been using a borrowed computer and internet connection. To work out spring rates, I need to have my engineering computer connected. I have copied this latest info onto a jump drive and I will work them out tonight on my computer, then post the results tomorrow using this computer.

You don't realise how much you rely on an internet connection until it's not there.

Cheers

[J-Boy]

ID: 62/62mm

OD: 13.5mm

No. of coils: 6.5

ID:62/62mm

OD: 13.5mm

No. of coils: 8 ( +3 turns of helper spring i think)

[Sydneykid]

ID: 62/62mm

OD: 13.5mm

No. of coils: 6.5

930 lbs / inch (16.6 kg/mm)

ID:62/62mm

OD: 13.5mm

No. of coils: 8 ( +3 turns of helper spring i think)

700 lbs / inch (12.5 kg/mm)

cheers

[Sydneykid]

Front:

Coil OD = 120/98mm

Wire OD = 13 mm

# of Coils = 9 turns

170 lbs / inch (3 kg/mm)

Rear:

Coil OD = 113/107mm

Wire OD = 13 mm

# of Coils = 10 turns

150 lbs / inch (2.6 kg/mm)

cheers

[negoshi8or]

Your Magic Please :-)

RS-R lowered Springs

Rear:

coil ID = 102/89mm

wire OD = 12mm

# of coils = 9

Spring rate =

Front:

coil ID = 98/68mm

wire OD = 11mm

# of coils = 9

Spring rate =

[Sydneykid]

Your Magic Please :-)

RS-R lowered Springs

Rear:

coil ID = 102/89mm

wire OD = 12mm

# of coils = 9

Spring rate = they are obviously progressive, so ~120 lbs / inch (2.2 kg/mm) on the low rate and ~270 lbs/inch (4.8kg/mm) on the high rate (based on 4 sacrificial coils)

Front:

coil ID = 98/68mm

wire OD = 11mm

# of coils = 9

Spring rate = they are also obviously progressive, so ~ 140 lbs / inch (2.4 kg/mm) on the low rate and ~320 lbs/inch (5.7 kg/mm) on the high rate (based on 4 sacrificial coils)

To get an accurate "driving along" rate you need to send me a picture of one each of the front and rear coils. Most progressive springs "drive along" on the high rate ie; the progression is simply there to make sure that the spring is trapped at full droop.

cheers

[negoshi8or]

Hi SK,

Thanks for the info. I was taking off the plastic covers that go on the base and tops of the springs and found a sticker - confirming they are RS-R Down Springs. Jumping on their website didnt yield much info but I have attached a pic.

I see the 3 sacrificial coils (on the rear shock?) as you described (closer windings than the other coils?)... there was some corrosion (due to contact I believe) on both rears. What does that indicate?

As always, thanks again for your knowledge.

Edited March 21, 2007 by negoshi8or

[Sydneykid]

Hi SK,

Thanks for the info. I was taking off the plastic covers that go on the base and tops of the springs and found a sticker - confirming they are RS-R Down Springs. Jumping on their website didnt yield much info but I have attached a pic.

I see the 3 sacrificial coils (on the rear shock?) as you described (closer windings than the other coils?)... there was some corrosion (due to contact I believe) on both rears. What does that indicate?

As always, thanks again for your knowledge.

Based on the pictures I have recalculated the rates as follows;

Rear:

coil ID = 102/89mm

wire OD = 12mm

# of coils = 9

Spring rate = they are obviously progressive, so ~130 lbs / inch (2.3 kg/mm) on the low rate and ~230 lbs/inch (4.1kg/mm) on the high rate (based on 3 sacrificial coils). They would run at the 230 lbs / inch rate all the time, the static weight of the car would take up 100% of the progression

Front:

coil ID = 98/68mm

wire OD = 11mm

# of coils = 9

Spring rate = they are also obviously progressive, so ~ 140 lbs / inch (2.4 kg/mm) on the low rate and ~240 lbs/inch (4.3 kg/mm) on the high rate (based on 3 sacrificial coils)

Obviously a bit higher than the Group buy rates, but not drastically so. They shouldn't ride too bad at 350 mm front and 340 mm rear as long as the bump stops were trimmed and the shocks were capable.

The wire diameters look thicker than 12 mm and 11mm in the pictures, are you sure that is what they are?

Sacrificial coils always touch each other, they are designed to do that. After a while they rub off the paint and the spring steel gets a bit of surface rust, nothing to worry about.

cheers

[negoshi8or]

Hey thanks SK...

Yes I measured each wire OD twice... taking close shots with my cannon ixus tends to distort pics a little.

So I will go ahead with the whitelines because well... they are new! And that the RS-R's are stiffer.

Thanks again.

Edited March 22, 2007 by negoshi8or