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Old 03-02-2009, 08:46 AM   #1
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Default should rear coilover springs be harder or softer than fronts?

not sure just bought some rear coilovers for track have some already on front.
should rears be hard or softer?
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Old 03-02-2009, 08:48 AM   #2
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depends on the car doesn't it?

usually is softer at det back with 2wd and 4wd, but fwd usually has stiffer springs at the back.

i'm running 550 lbs at the front, and 350 lbs at the rear on my trackday 2wd sapphire. gaz gold coilovers. well pleased with that setup.
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Old 03-02-2009, 08:49 AM   #3
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softer.....it's a breaking thing....
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Old 03-02-2009, 08:55 AM   #4
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I run 350 upfront and 550 up the rear on the Festa
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Old 03-02-2009, 09:15 AM   #5
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there goes my theory.........
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Old 03-02-2009, 09:28 AM   #6
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Totally depends where your weight is distributed and where your drive comes from.
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Old 03-02-2009, 09:41 AM   #7
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Quote:
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there goes my theory.........
not wrong, it depends on what wheels are driven
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Old 06-02-2009, 12:21 PM   #8
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What size rears? 12"?

Quote:
Originally Posted by olek View Post
depends on the car doesn't it?

usually is softer at det back with 2wd and 4wd, but fwd usually has stiffer springs at the back.

i'm running 550 lbs at the front, and 350 lbs at the rear on my trackday 2wd sapphire. gaz gold coilovers. well pleased with that setup.
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Old 06-02-2009, 12:41 PM   #9
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ive got 500lbs up front so ive just ordered 350s for rear
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Old 06-02-2009, 12:46 PM   #10
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Quote:
Originally Posted by Roosie View Post
ive got 500lbs up front so ive just ordered 350s for rear

Sounds about right, mine handles well in reverse so for Rwd i reckon thts about right, BUT if not then its not too dear to play around with different spring rates
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Old 06-02-2009, 02:16 PM   #11
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if you have rwd and want to break traction easily(drifting) make them harder at the back.
if you have rwd or 4wd and want to do good drag launches without wheelspin make them softer at the back, to push more weight on the back wheels.
for a good handling rwd/4wd car have the backs a small bit softer than the front
just my experiences with setups
luca is spot on about fwd
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Old 06-02-2009, 02:18 PM   #12
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Quote:
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Sounds about right, mine handles well in reverse so for Rwd i reckon thts about right, BUT if not then its not too dear to play around with different spring rates

Luke, whats yours like on the road? as that is pretty huge spring rate you are running !
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Old 06-02-2009, 02:38 PM   #13
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Quote:
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ive got 500lbs up front so ive just ordered 350s for rear

I hope it is for a track only Sapphire, or you're in for a NASTY shock (literally) . Do you have any fillings? Don't worry if you have, because you won't for much longer .
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Old 06-02-2009, 02:47 PM   #14
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Quote:
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What size rears? 12"?
from what i can remember it's 8" up front and 12" at the rear.
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Old 06-02-2009, 03:23 PM   #15
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Quote:
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I hope it is for a track only Sapphire, or you're in for a NASTY shock (literally) . Do you have any fillings? Don't worry if you have, because you won't for much longer .
yes mike track only
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Old 06-02-2009, 03:26 PM   #16
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Quote:
Originally Posted by pee vee View Post
Luke, whats yours like on the road? as that is pretty huge spring rate you are running !
Il be totally honest it rides better than with the old set up which was half that.

Id also go as to say I may increase the rear rates by 50 and see how it feels. As for Road its not harsh in the slightest which I agree i thought it would be.
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Old 06-02-2009, 04:05 PM   #17
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Quote:
Originally Posted by alanfordtw-15 View Post
if you have rwd and want to break traction easily(drifting) make them harder at the back.
if you have rwd or 4wd and want to do good drag launches without wheelspin make them softer at the back, to push more weight on the back wheels.
for a good handling rwd/4wd car have the backs a small bit softer than the front
just my experiences with setups
luca is spot on about fwd
This is correct, its all about where you want the weight to shift when your on and off power, braking.
If the back is to soft, then on power, exiting a corner it will generate understeer, etc etc
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Old 06-02-2009, 08:43 PM   #18
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Running 350/450 split on my erst on advice from a reputable source......would hardly say it's a 'nice' ride on the road tbh but then it's on track where i want the car to handle so it's not a concern! Haven't had the chance to try em yet on track so can't confirm how the car handles.
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Old 06-02-2009, 08:43 PM
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350450, coilover, drag, figure, front, fronts, fwd, harder, poundage, rate, rear, rearcoiloversprings, rwd, sierra, softer, spring, springs, weight

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