08-12-2014, 07:13 PM
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#9 (permalink)
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Track Member
Join Date: Jan 2011
Location: los angeles
Age: 39
Posts: 933
Drives: 370z, EK Civic, F150
Rep Power: 16
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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.
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1000lbs springs are still softer then bump stops 
Quote:
Originally Posted by GSS138
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.
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before any spring rates get changed around, i think that rear Hotchkis needs to go and be tested with stock. then further tuning from there.
Quote:
Originally Posted by synolimit
I was told by the company I bought my 2 ways from that the front and rear rates need to be closely matched for even balance. Like if you need a harder front you might also need to step up your rear. He advised to stay within a 5-6k range unless you're a drifter then it changes. Anyone else follow this rule?
I see Shamu is at 8k difference now but would like 7k and bkleeman is within that range.
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with both the weight balance of the 370 NOT being 50/50,. and the high amount of both front grip potential with sqaure tire setup, decently high levels of unsprung weight, and the wishbone suspension, i think the front really needs a good amount of rate. depending what rear rate you need depends on spring location (stock or true coilover), sway bar selection in back (large, stock, or none), power level, and LSD.
Quote:
Originally Posted by Shamu
Agreed im running stock nismo bar in the rear
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I run G37S coupe rear bar
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