GTRNUR Posted August 29, 2008 Share Posted August 29, 2008 Hi Gary, Im trying to setup a nice highway cruising suspension setup from the myriad of parts i have collected. This is a pic of some R34 GTR shocks with some unknown brand of spring that were on my 2nd set of bilsteins. The front and rear springs measure the same ID/OD as the stock R34 springs, and are 13mm in diameter. The fronts have 8.5 turns with 4 wound closely, 96mm ID The rears have 7.5 turns with 3 would closely, 102mm ID I hoping this will make a fair match. I'd rather not have to pay to have my 2nd set of bilsteins re-valved. Cheers, Ian Link to comment https://www.sau.com.au/forums/topic/79157-how-do-i-tell-what-my-spring-rates-are/page/16/#findComment-4100106 Share on other sites More sharing options...
GTRNUR Posted August 29, 2008 Share Posted August 29, 2008 Ammendment to above... because i cant edit it! The fronts have 8.5 turns with 4 wound closely Coil ID = 96/70 mm Wire OD = 13 mm # of Coils = 8.5 turns The rears have 7.5 turns with 3 wound closely Coil ID = 102/91 mm Wire OD = 13 mm # of Coils = 7.5 turns Link to comment https://www.sau.com.au/forums/topic/79157-how-do-i-tell-what-my-spring-rates-are/page/16/#findComment-4100235 Share on other sites More sharing options...
GTRNUR Posted August 29, 2008 Share Posted August 29, 2008 Going through all the results i saw a request to know what standard R34 gtr spring rate measurements are. These measurements are from standard non vspec non NUR 2002 R34 GTR springs. Front: Coil ID = 97 mm top Coil ID = 66.5mm Bottom Wire D = 13 mm # of Coils = 5 1/8 turns Rear: Coil ID = 102.5 mm top Coil ID = 88.4 MM Bottom Wire D = 13 mm # of Coils = 4 1/8 turns Link to comment https://www.sau.com.au/forums/topic/79157-how-do-i-tell-what-my-spring-rates-are/page/16/#findComment-4100263 Share on other sites More sharing options...
dori34 Posted September 6, 2008 Share Posted September 6, 2008 (edited) hey Sk, can you calculate my spring rate front Coil ID: 91mmTOP 91mm BOTTOM Wire ID: 14mm # of coils: 11.125 rear Coil ID: 91mmTOP 91mm BOTTOM Wire ID: 12mm # of coils: 11.125 there were measured with a tape measure with the springs still on the shock. Cheers Edited September 6, 2008 by dori32 Link to comment https://www.sau.com.au/forums/topic/79157-how-do-i-tell-what-my-spring-rates-are/page/16/#findComment-4115636 Share on other sites More sharing options...
Sydneykid Posted September 9, 2008 Author Share Posted September 9, 2008 Coil OD = 125/100 mmWire OD = 14 mm # of Coils = 7.5 turns 270 lbs/inch (4.8kg/mm) Coil OD = 110/90 mm Wire OD = 13 mm # of Coils = 7.125 turns 300 lbs/inch (5.4kg/mm) Coil OD = 125 mm Wire OD = 15 mm # of Coils = 9 turns 295 lbs/inch (5.3kg/mm) Coil ID = 65 mm Wire OD = 13 mm # of Coils = 6.75 turns 690 lbs/inch (12.3kg/mm) NB. 3 ODs and 1 ID Can i please get them in KGmm and Lb" Thanks Heaps James Sorry for the delay James, I have been tooo busy to forum. Cheers Gary Link to comment https://www.sau.com.au/forums/topic/79157-how-do-i-tell-what-my-spring-rates-are/page/16/#findComment-4121751 Share on other sites More sharing options...
Sydneykid Posted September 9, 2008 Author Share Posted September 9, 2008 Hi Gary,Im trying to setup a nice highway cruising suspension setup from the myriad of parts i have collected. This is a pic of some R34 GTR shocks with some unknown brand of spring that were on my 2nd set of bilsteins. The front and rear springs measure the same ID/OD as the stock R34 springs, and are 13mm in diameter. The fronts have 8.5 turns with 4 wound closely, 96mm ID 185 lbs/inch (3.3kg/mm) 480 lbs/inch (8.5kg/mm) No true progression there, the progressive coils are too close together, so they would be at the 480 rate all the time when driving. The rears have 7.5 turns with 3 would closely, 102mm ID 185 lbs/inch (3.3kg/mm) 410 lbs/inch (7.3kg/mm) No true progression there either, the progressive coils are too close together, so they would be at the 410 rate all the time when driving. I hoping this will make a fair match. I'd rather not have to pay to have my 2nd set of bilsteins re-valved. Cheers, Ian Typical Japanese R34GTR spring rates, too high in general plus they try and fix the understeer with out of proportion (to the weight) rear spring rates. A decent sized rear swaybar is much better fix for the understeer and it doesn't compromise the ride or traction anywhere near as much. The sphositicated Bilstein valving (depending on part numbers) will typically handle a much softer spring rate without any problem. Cheers Gary Link to comment https://www.sau.com.au/forums/topic/79157-how-do-i-tell-what-my-spring-rates-are/page/16/#findComment-4121779 Share on other sites More sharing options...
Sydneykid Posted September 9, 2008 Author Share Posted September 9, 2008 Ammendment to above... because i cant edit it!The fronts have 8.5 turns with 4 wound closely Coil ID = 96/70 mm Wire OD = 13 mm # of Coils = 8.5 turns 270 lbs/inch (4.8kg/mm) 700 lbs/inch (12.5kg/mm) The rears have 7.5 turns with 3 wound closely Coil ID = 102/91 mm Wire OD = 13 mm # of Coils = 7.5 turns 215 lbs/inch (3.8kg/mm) 475 lbs/inch (8.4kg/mm) Cheers Gary Link to comment https://www.sau.com.au/forums/topic/79157-how-do-i-tell-what-my-spring-rates-are/page/16/#findComment-4121795 Share on other sites More sharing options...
Sydneykid Posted September 9, 2008 Author Share Posted September 9, 2008 Going through all the results i saw a request to know what standard R34 gtr spring rate measurements are. These measurements are from standard non vspec non NUR 2002 R34 GTR springs.Front: Coil ID = 97 mm top Coil ID = 66.5mm Bottom Wire D = 13 mm # of Coils = 5 1/8 turns 485 lbs/inch (8.7kg/mm) Rear: Coil ID = 102.5 mm top Coil ID = 88.4 MM Bottom Wire D = 13 mm # of Coils = 4 1/8 turns 390 lbs/inch (7.0kg/mm) Cheers Gary Link to comment https://www.sau.com.au/forums/topic/79157-how-do-i-tell-what-my-spring-rates-are/page/16/#findComment-4121816 Share on other sites More sharing options...
Sydneykid Posted September 9, 2008 Author Share Posted September 9, 2008 hey Sk, can you calculate my spring rate front Coil ID: 91mmTOP 91mm BOTTOM Wire ID: 14mm # of coils: 11.125 190 lbs/inch (3.4kg/mm) Progressive? rear Coil ID: 91mmTOP 91mm BOTTOM Wire ID: 12mm # of coils: 11.125 110 lbs/inch (2.0kg/mm) Progressive? there were measured with a tape measure with the springs still on the shock. Cheers Cheers Gary Link to comment https://www.sau.com.au/forums/topic/79157-how-do-i-tell-what-my-spring-rates-are/page/16/#findComment-4121823 Share on other sites More sharing options...
dori34 Posted September 10, 2008 Share Posted September 10, 2008 ^ thanks SK. ive since canned those coilovers as they were knocking. Link to comment https://www.sau.com.au/forums/topic/79157-how-do-i-tell-what-my-spring-rates-are/page/16/#findComment-4124504 Share on other sites More sharing options...
Dan_J Posted September 14, 2008 Share Posted September 14, 2008 hey SK, after rates for these. Coil ID: 70mm Coil ID: 86mm Wire ID: 13mm # of coils: 8 thanks Link to comment https://www.sau.com.au/forums/topic/79157-how-do-i-tell-what-my-spring-rates-are/page/16/#findComment-4132295 Share on other sites More sharing options...
Sydneykid Posted September 15, 2008 Author Share Posted September 15, 2008 hey SK, after rates for these.Coil ID: 70mm Coil ID: 86mm Wire ID: 13mm # of coils: 8 thanks 340 lbs/inch (6.1kg/mm) Cheers Gary Link to comment https://www.sau.com.au/forums/topic/79157-how-do-i-tell-what-my-spring-rates-are/page/16/#findComment-4134007 Share on other sites More sharing options...
gts4wa Posted October 9, 2008 Share Posted October 9, 2008 hey Sk, can you please calculate my spring rate front Coil ID: 69mm top & bottom Wire ID: 12.5mm # of coils: 9.0 evenly spaced rear Coil ID: 71mm top & bottom Wire ID: 11.5mm # of coils: 9.125 evenly spaced Thanks heaps Link to comment https://www.sau.com.au/forums/topic/79157-how-do-i-tell-what-my-spring-rates-are/page/16/#findComment-4184865 Share on other sites More sharing options...
Speed Safe Posted October 11, 2008 Share Posted October 11, 2008 Hi SK Can you help calculate my spring rates please. HKS coilovers for S13. Hypermax D. I'm guessing pretty stiff Not sure what to measure when it comes to the Coil OD's as I have progressive springs. So attached pic for your assistance. Fronts: Coil OD lowest coil 82mm/very top coil 82mm. Widest part of OD is the middle of the top 5 coils and that measures 95mm. 5 coils at top close sprung. Wire OD = 11mm # of coils = 10.5 Spring Rate = Rears: Coil OD lowest coil 87mm/very top coil 87mm. Widest part of OD is the middle of the top 5 coils and that measures 95mm. 5 coils at top close sprung Wire OD = 11mm # of coils = 10.125 Spring Rate = Thanks Sam Link to comment https://www.sau.com.au/forums/topic/79157-how-do-i-tell-what-my-spring-rates-are/page/16/#findComment-4189247 Share on other sites More sharing options...
9krpm Posted October 12, 2008 Share Posted October 12, 2008 Thanks in advance for the calculation SK, My front one are Coil ID = 70 mm Wire OD = 13 mm # of Coils = 9.5 turns and the rear are Coil ID = 59 mm Wire OD = 12 mm # of Coils = 12 turns Link to comment https://www.sau.com.au/forums/topic/79157-how-do-i-tell-what-my-spring-rates-are/page/16/#findComment-4190596 Share on other sites More sharing options...
tk80 Posted October 16, 2008 Share Posted October 16, 2008 gary can you look at my measurements again.....thanks http://www.skylinesaustralia.com/forums/Bi...-G-t235758.html Link to comment https://www.sau.com.au/forums/topic/79157-how-do-i-tell-what-my-spring-rates-are/page/16/#findComment-4201036 Share on other sites More sharing options...
SkylineGTT25 Posted November 11, 2008 Share Posted November 11, 2008 Gary, one for you - ID 80mm/80mm Wire OD 16mm 8.5 turns Thanks again J Link to comment https://www.sau.com.au/forums/topic/79157-how-do-i-tell-what-my-spring-rates-are/page/16/#findComment-4254586 Share on other sites More sharing options...
Lived4eva Posted November 14, 2008 Share Posted November 14, 2008 Hey Gary can you please work your magic formula over these, Rear OD:- 92mm Coils :- 8.2 turns Springs Diameter :- 12.9mm Front OD :- 95mm Coils :- 10.1 turns Spring diameter :- 14.3mm Thanks in advance Link to comment https://www.sau.com.au/forums/topic/79157-how-do-i-tell-what-my-spring-rates-are/page/16/#findComment-4260565 Share on other sites More sharing options...
lidz Posted November 23, 2008 Share Posted November 23, 2008 Hi SK could you please calculate some spring rates for me. FRONT: Coil ID = 99 top / 68 bottom (mm) Wire OD = 12.7 mm # of Coils = 7.5 turns REAR: Coil ID = 88.5 top / 77.5 bottom (mm) Wire OD = 12 mm # of Coils = 11 turns thanks, Tim. Link to comment https://www.sau.com.au/forums/topic/79157-how-do-i-tell-what-my-spring-rates-are/page/16/#findComment-4278291 Share on other sites More sharing options...
SkylineGTT25 Posted December 3, 2008 Share Posted December 3, 2008 Not sure when we may get a answer to these rate questions, but here a link to a basic calculator which may help. http://www.proshocks.com/calcs/coilsprate.htm Link to comment https://www.sau.com.au/forums/topic/79157-how-do-i-tell-what-my-spring-rates-are/page/16/#findComment-4298262 Share on other sites More sharing options...
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