Spring rate help?

Shamu · 08-12-2014, 01:05 PM

I run 1000 lb fronts and 550 lb rears and thats not enough spring for slicks. You are way undersprung upfront. low front spring rate allowing rear to lift like that.

We are going to 1100 front and 700 rear maybe more! I drove on streets for couple years with 1000 lb springs and JRZ coilovers. Was downright comfy.

synolimit · 08-12-2014, 01:51 PM

Quote:

Originally Posted by Shamu

I run 1000 lb fronts and 550 lb rears and thats not enough spring for slicks. You are way undersprung upfront. low front spring rate allowing rear to lift like that.

We are going to 1100 front and 700 rear maybe more! I drove on streets for couple years with 1000 lb springs and JRZ coilovers. Was downright comfy.

Really? I'm DDing my new 2 ways that just came in, 1000 fronts and 670 rears

I'll figure out tomorrow I guess.

GSS138 · 08-12-2014, 02:09 PM

Would agree with all the above. The rates are low. In the pic, the front right is rolling over(as is probably the rear), and the rear sway is lifting the rear left.

Clint's suggestion is definitely the fastest, least expensive change though. Long term I would look at something more like 16kF/10KR if you otherwise like your current setup.

08-12-2014, 01:05 PM	#1 (permalink)
Shamu A True Z Fanatic Join Date: Jan 2011 Location: Nor Cal Posts: 1,059 Drives: 370Z Racecar Rep Power: 20	I run 1000 lb fronts and 550 lb rears and thats not enough spring for slicks. You are way undersprung upfront. low front spring rate allowing rear to lift like that. We are going to 1100 front and 700 rear maybe more! I drove on streets for couple years with 1000 lb springs and JRZ coilovers. Was downright comfy. synolimit likes this. __________________ Grant Last edited by Shamu; 08-12-2014 at 01:11 PM.

08-12-2014, 02:09 PM	#3 (permalink)
GSS138 Track Member Join Date: Mar 2013 Location: Mission Viejo, CA Posts: 769 Drives: '12 370Z 6M Sport Rep Power: 14	Would agree with all the above. The rates are low. In the pic, the front right is rolling over(as is probably the rear), and the rear sway is lifting the rear left. Clint's suggestion is definitely the fastest, least expensive change though. Long term I would look at something more like 16kF/10KR if you otherwise like your current setup. __________________ Current Mods: Vorpal Weapon +5.

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