Suspension & Brakes Theory, alignment, spring rates....

koni/GC VS function form type 2's

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Old Sep 8, 2009 | 08:40 PM
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Default koni/GC VS function form type 2's

On the koni/GC setup... what would be the best spring rate setup for a daily driver / road course car... Thanks for all your guy's help..

Last edited by maximusmda; Sep 9, 2009 at 12:14 AM. Reason: new question...
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Old Sep 8, 2009 | 10:22 PM
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Default Re: koni/GC VS function form type 2's

if you have read through a page of two of threads the answer is likely obvious
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Old Sep 8, 2009 | 11:49 PM
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Default Re: koni/GC VS function form type 2's

Originally Posted by idrivesideways
if you have read through a page of two of threads the answer is likely obvious
thanks for the useless info..... but i was looking for a real answer... BUMP
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Old Sep 8, 2009 | 11:54 PM
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Default Re: koni/GC VS function form type 2's

Originally Posted by maximusmda
thanks for the useless info..... but i was looking for a real answer... BUMP
if you knew how to read you would have one. seriously, there are multiple threads on this exact same question
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Old Sep 9, 2009 | 12:12 AM
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Default Re: koni/GC VS function form type 2's

Originally Posted by idrivesideways
if you knew how to read you would have one. seriously, there are multiple threads on this exact same question
ok i appoligize... i was just in a hurry to post while i was at work... and i posted somthing i wanted the answer too.. maybe you can help me with a better question.. cause i obviously got my answer... Koni/GC seems to be the general choice.... what spring rates would be a good choice? for a DD/ great handling/ spirited driving... Again.. sorry for the stupid question..
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Old Sep 9, 2009 | 02:00 AM
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Default Re: koni/GC VS function form type 2's

oh it's okay. the koni gc combo is one of the best for the money. what tires are you going to run and what chassis? if i knew the frame and the tire i could give you a rate suggestion.
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Old Sep 9, 2009 | 08:16 AM
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Default Re: koni/GC VS function form type 2's

right now i'm not sure what tire i'm ultimatly going to be running but at the moment i am running khumo ast's.. and it's an EJ6... (98 civic DX coupe)
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Old Sep 9, 2009 | 12:11 PM
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Default Re: koni/GC VS function form type 2's

if you stay with all season tires 350/300 rates will be a good choice. if you buy 8" springs for all 4 corners it makes switching those rates front to back easy. ground control often sells 7"springs for the rear but they are completely unnecessary unless your goal is dragging the car on the ground.

if you move to a hard compound performance tire like the yoke s drive you can take the rates to 400/350 and if you upgrade to a real summer tire like the kumho xs or dunlop star spec you can run either 450/400 or 500/450

if anyone reading this is wondering why tires have an impact on the chosen rate...here it is: if you run a 500/450 rate with kumho ast's you will hate your car quickly. body roll will be virtually gone everywhere and cornering will get downright scary if you aren't 100% on alert all the time. the lack of any chassis movement will promote snap handling where you're more or less ripping a corner and bam, tires are sliding with little to no warning. with a sticky tire like the XS these rates are very good. this tire has enough grip to give you some chassis movement and communicate back what's going on with the tire. if you were driving a fully warmed up R compound you would think these rates were way too soft. it all depends on the traction. all springs really do is help roll resistance. at the same time stiff rates promote a traction DECREASE since the suspension will not track as well as softer rates allow.

Last edited by racebum; Sep 9, 2009 at 12:16 PM.
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Old Sep 9, 2009 | 05:54 PM
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Default Re: koni/GC VS function form type 2's

Originally Posted by idrivesideways
if you stay with all season tires 350/300 rates will be a good choice. if you buy 8" springs for all 4 corners it makes switching those rates front to back easy. ground control often sells 7"springs for the rear but they are completely unnecessary unless your goal is dragging the car on the ground.

if you move to a hard compound performance tire like the yoke s drive you can take the rates to 400/350 and if you upgrade to a real summer tire like the kumho xs or dunlop star spec you can run either 450/400 or 500/450

if anyone reading this is wondering why tires have an impact on the chosen rate...here it is: if you run a 500/450 rate with kumho ast's you will hate your car quickly. body roll will be virtually gone everywhere and cornering will get downright scary if you aren't 100% on alert all the time. the lack of any chassis movement will promote snap handling where you're more or less ripping a corner and bam, tires are sliding with little to no warning. with a sticky tire like the XS these rates are very good. this tire has enough grip to give you some chassis movement and communicate back what's going on with the tire. if you were driving a fully warmed up R compound you would think these rates were way too soft. it all depends on the traction. all springs really do is help roll resistance. at the same time stiff rates promote a traction DECREASE since the suspension will not track as well as softer rates allow.
Good info, thank you.. now why would i want to swap rates front to back? and i was planning on doing the whole deal that THMotorsports had going on... the stage 2 package with the gc top hats for the front... so if i'm going to stick with an all season tire like the ast's you say i should go with 350 front and 300 rear?? and i will want the car pretty low.. as low as i can go without scraping everywhere! again thanks for your info and your help...
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Old Sep 9, 2009 | 06:05 PM
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Default Re: koni/GC VS function form type 2's

you might like 400/350 more if you get pretty low. or at least it will keep you from scarping. the real upgrade you need are tires. if you took two integras and put koni/gc on one with ast tires and left the other bone stock with XS tires the XS equipped car would be faster.

as far as swapping rates. well, a stiffer rear spring is useful in autocross, sometimes in road racing and generally not on the street. for the majority of street setup a slightly stiffer front spring and large rear sway bar get the car pretty damn close to neutral. more spring out back promotes oversteer which is useful autocrossing but not really the best way to set up a street car
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Old Sep 9, 2009 | 07:21 PM
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Default Re: koni/GC VS function form type 2's

Originally Posted by idrivesideways
you might like 400/350 more if you get pretty low. or at least it will keep you from scarping. the real upgrade you need are tires. if you took two integras and put koni/gc on one with ast tires and left the other bone stock with XS tires the XS equipped car would be faster.

as far as swapping rates. well, a stiffer rear spring is useful in autocross, sometimes in road racing and generally not on the street. for the majority of street setup a slightly stiffer front spring and large rear sway bar get the car pretty damn close to neutral. more spring out back promotes oversteer which is useful autocrossing but not really the best way to set up a street car
well, my plan was to get the asr subframe sway bar combo along with the koni/GC setup.. i've heard good things about it and was gonna try it out on this car...

the car i had before i had tein ss-p's on it with ST front and rear sway bars with energy bushings Skunk2 lca's and camber kits... i really like the way it rode.. it was a little to stiff (on the stiffest setting) for me on the streets... but all in all it was a pretty good ride...so you think 400/350 would be good for me.. i guess i'm going to have to try it out.. and if it's to stiff i guess i could trade someone that wanted stiffer spring rates huh?
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Old Sep 9, 2009 | 08:17 PM
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Default Re: koni/GC VS function form type 2's

tein ss is 450/350 more or less so 400/350 should be right in the ballpark. the rest of your ideas with the brace are good, the st rear bar is also good. the front one you generally don't need. drive it, try it, see what you think. if for some reason the rear rotates too easy you could add the front bar but i doubt you will need to
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Old Sep 9, 2009 | 08:29 PM
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Default Re: koni/GC VS function form type 2's

woud you say the koni/GC setup will be compairable to the SS-T that i had? or will i be dissapointed? Thanks again....
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Old Sep 9, 2009 | 09:04 PM
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Default Re: koni/GC VS function form type 2's

Originally Posted by maximusmda
woud you say the koni/GC setup will be compairable to the SS-T that i had? or will i be dissapointed? Thanks again....
most of the autocrossers i talk to would prefer koni/gc over the ss. better dampening adjustment is the biggest bonus. other than that, you will probably think they feel similar
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Old Sep 9, 2009 | 09:09 PM
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Default Re: koni/GC VS function form type 2's

thanks for all the help... i appritiate it.
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Old Sep 13, 2009 | 05:33 PM
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Default Re: koni/GC VS function form type 2's

Originally Posted by idrivesideways
most of the autocrossers i talk to would prefer koni/gc over the ss. better dampening adjustment is the biggest bonus. other than that, you will probably think they feel similar

Say it with me, D-A-M-P-I-N-G, lol
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Old Sep 13, 2009 | 06:41 PM
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Default Re: koni/GC VS function form type 2's

Originally Posted by stain
Say it with me, D-A-M-P-I-N-G, lol
google it

no one can figure out the correct spelling, or which way is correct? the en makes more sense to me since the shocks job is to dampen {control} spring movement
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Old Sep 13, 2009 | 08:02 PM
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Default Re: koni/GC VS function form type 2's

Originally Posted by stain
Say it with me, D-A-M-P-E-N-I-N-G, lol

F-I-X-E-D.
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Old Sep 13, 2009 | 08:31 PM
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Default Re: koni/GC VS function form type 2's

"Dampening" is a reliable sign to ignore everything the poster has said as they have no idea what they're talking about.
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Old Sep 13, 2009 | 09:53 PM
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Default Re: koni/GC VS function form type 2's

Originally Posted by stain
Say it with me, D-A-M-P-I-N-G, lol

correction. people say it this way also. lol. damnP!
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Old Sep 14, 2009 | 09:01 PM
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Default Re: koni/GC VS function form type 2's

Originally Posted by string
"Dampening" is a reliable sign to ignore everything the poster has said as they have no idea what they're talking about.
and what spring rates are you using with your koni/gc setup?
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Old Sep 14, 2009 | 09:05 PM
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Default Re: koni/GC VS function form type 2's

Originally Posted by string
"Dampening" is a reliable sign to ignore everything the poster has said as they have no idea what they're talking about.
if you believe this i would have to see how you choose a girlfriend. any kangaroos in the bedroom?
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