Spring rates

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Spring rates

Postby 1I1 » Wed Feb 04, 2009 12:44 pm

Ok Corolla went in for cert on coilovers and superstrut calipers yesterday. When the car was dropped back at work i was told it failed - the springs are too hard. He suggested softening the shocks right up to see if that helps. Took it back at lunch time for a recheck but got told it was borderline (a pass tho :D ). My question is what spring rates do people run? The BC's i got came with 6kg/4kg front/rear and the kit was meant to be the "street version".


(car is AE111 sedan with full interior etc)
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Postby Distrb » Wed Feb 04, 2009 12:47 pm

i run 5 kg/mm front and 3.5 kg/mm rear in an AE82 Fx-Gt on the street. Shocks are reasonably stiff valving also.
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Postby neo » Wed Feb 04, 2009 12:59 pm

My Bazda Suspension.

Racecar with 15" wheels - got its cert with
1 x race set (adj. damp.) + 8kg front - 6kg rear springs

When I tried the following in my roadcar with 17" wheels, I removed it immediatly as it was stupidly bad.
1x road set + 6kg front - 4kg rear springs
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Postby 1I1 » Wed Feb 04, 2009 1:08 pm

Yeah corolla has 17's and 205/40 tyres. hmm when sam (NILPSI) came for a ride two weeks ago he thought the ride wasn't too bad
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Postby pc » Wed Feb 04, 2009 6:58 pm

8kg front and 6kg rear in my AE82... not really a "road" car, as it's not comfy driving on the road anymore.
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Postby Dell'Orto » Wed Feb 04, 2009 7:01 pm

Danny did your cert eh?
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Postby d1 mule » Wed Feb 04, 2009 7:06 pm

got my old Z10 soarer certed with 8 and 6kg adjustables no problem
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Postby xsspeed » Wed Feb 04, 2009 7:10 pm

neo wrote:When I tried the following in my roadcar with 17" wheels, I removed it immediatly as it was stupidly bad.
1x road set + 6kg front - 4kg rear springs


6F and 4R was bad? Was that a Bazda set as well?
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Postby Dell'Orto » Wed Feb 04, 2009 10:47 pm

d1 mule wrote:got my old Z10 soarer certed with 8 and 6kg adjustables no problem


Z10 is probably a wee bit heavier than a AE111 Corolla, or enough at least to make a difference.
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Postby rollaholic » Wed Feb 04, 2009 11:35 pm

got 8kg fronts and 6kg rears in my trueno.

not the greatest ride on our bumpy streets :(
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Postby 1I1 » Thu Feb 05, 2009 8:00 am

Dell'Orto wrote:Danny did your cert eh?


Yup. Getting it's plate today :D yay legal.

Yeah i don't mind the ride of these springs but i don't want the problem of spot welds failing etc.

Been told by contact at redline to check pre-load set up so that will be something for the long weekend
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Postby Bazda » Thu Feb 05, 2009 2:03 pm

xsspeed wrote:
neo wrote:When I tried the following in my roadcar with 17" wheels, I removed it immediatly as it was stupidly bad.
1x road set + 6kg front - 4kg rear springs


6F and 4R was bad? Was that a Bazda set as well?


Yes

depends what ur definition of bad is.
I dont think its the spring rate, its more the shock rate.

When I run 14kg springs from 8kg I dont really notice that much difference on the road.

If you want a nice ride stick with standard shocks and lowering springs :).
If u want adjustables that are soft, the car wont handle very well.
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Postby FLAWLES » Thu Feb 05, 2009 2:11 pm

i run with bc coil overs in my jzx100

my rates are 12kg on the front
10kgs on the back

backs are still a bit to soft, mostly to do with the dampning rate tho

last three digits on the spring part number are the rates
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Postby pc » Thu Feb 05, 2009 6:06 pm

xsspeed wrote:
neo wrote:When I tried the following in my roadcar with 17" wheels, I removed it immediatly as it was stupidly bad.
1x road set + 6kg front - 4kg rear springs

6F and 4R was bad? Was that a Bazda set as well?

Bad for comfy cushioned road driving, really good for fast track/sealed sprint driving.
You can't have both.
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1/4 mile - 14.683s @ 91.83mph
Manfield - 1:24s
Taupo - Track1 1:53s (road tyres) - Track2 1:22s - Track3 48s (with esses) - Track4 1:58s
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