bouncy ride =[ why? help solve.

[Geezy]

so i just put in my new Stance GR+ coilovers.
and i got my stretched tires over 18x9.5 in the rears on.
tire pressure is at about 45-50

suspension settings are -10 from the stiff side in the front
and +3 from the soft side in the rear.
(thats as simple as i could phrase it)

and the ride is bouncy as a muthafuker.

HELP ME FIGURE OUT WHY AND HOW TO SOLVE

[Geezy]

PS.

no matter what settings i got in the rear, it still bounces.

[s13 @ fullboost]

there coils man live wit it or go back to shocks and springs

[FaLKoN240]

You need to not run so much preload on the spring.

[SidewayZ-s14]

there coils man live wit it or go back to shocks and springs


Beat me to it.

[mmdb]

bouncy like you hit a bump and the car hops? Or like you hit a bump and the car continues to oscillate up and down?

[yarou]

there coils man live wit it or go back to shocks and springs

lolwut


also, you're gonna need to give more details other than "bounce:

[hOngsterr]

haha, its the damping maybe?

when i made my car stiffer i bounced like crazy but it was stable.
lol

[s14canyoncity]

there coils man live wit it or go back to shocks and springs

Beat me to it.


im with them ... if you dont like them ill trade you my Megan plus cash :keke:

[Geezy]

it feels like its TOO stiff.
do the springs just need to be broken in?
or is their really too much preload? (guessing i might have fuked something up in adjusting the height?)

I guess oscillation could be a good way to put it? but it hurts. lol. i start to get a headache after a while. i dont think it should be THIS bad. and its ONLY in the rears. i know its because the stretched tires. stock wheels and tires in the front.

but i had the new wheels before i put the coilovers on, and it didnt affect it too much.
now that the coilovers are in... theyre fukn me up.

it feels like its not absorbing as much as it should.
i really think its the springs?

[ManoNegra]

people run that much pressure in tires?
get the car corner balanced at a reputable place.

[clark]

dude...you have coilovers, a 2800 pound car, and low profile tires....this aint your granpappys Cadillac.

[aznpoopy]

I guess oscillation could be a good way to put it? but it hurts. lol. i start to get a headache after a while. i dont think it should be THIS bad. and its ONLY in the rears. i know its because the stretched tires. stock wheels and tires in the front.

if it's oscillating (i.e. like you have blown shocks), preload has nothing to do with it.

increase clicks on the shock to bring stiffness to where it needs to be to keep spring from oscillating.

now if you've increased clicks so it doesn't bounce, but now you feel the ride is too harsh, too bad. that's just how the coilover is.

if you have excessive preload on your suspension, the car will ride like its on solid beams. no bouncing, but very harsh.

[bui]

^^^Haha

The roughness is suppose to be like that, they have adjustable dampening so you can soften it a little bit but the stiffer the springs, the less body roll so yea BUT a rougher ride

The Stance GR+'s have a spring rate of 8k front and 6k rear. Stock suspension is somewhere like 4k front and 3k rear

[Crazyirish]

The Stance GR+'s have a spring rate of 8k front and 6k rear. Stock suspension is somewhere like 4k front and 3k rear

More Like 2k front and rear.

[Geezy]

when i hit little pot holes, it feels like it doesnt absorb it at all.
if feels like those rhythmic jumps you see on motocross.
like a pebble being skipped on water.
sure, they're coilovers and their supposed to be stiff.
but this shit feels BAD.

[Geezy]

if it's oscillating (i.e. like you have blown shocks), preload has nothing to do with it.

increase clicks on the shock to bring stiffness to where it needs to be to keep spring from oscillating.

now if you've increased clicks so it doesn't bounce, but now you feel the ride is too harsh, too bad. that's just how the coilover is.

if you have excessive preload on your suspension, the car will ride like its on solid beams. no bouncing, but very harsh.

even with the dampers on the softest setting, it doesnt feel like its bounding enough to absorb bumps.

i really think it might be preload on the spring when i adjusted the ride height. i guess "solid beams" could be a good way to put it.

[carps13guy]

OP, just give it a few months & the springs & shocks will break in. i thought my car was way too stiff when i first installed my kts coils. now about 6mo's later i love em. but like previously stated, your spring rates are like triple that of stock, its not going to be comfy now matter what you do, but you'll handle like no tomorrow

[Geezy]

ima adjust the spring perches today.
i really think that its the preload on the springs from when i adjusted them

[[email protected]]

Lower spring rates, full soft dampening, and as little preload as possible. Then it'll feel like your granpappies Caddy. LOL!

[Geezy]

im filipino.
my grandpa would never drive a caddy, fuk stick. maybe an old school cressida, but never a caddy.
good help is hard to find these days, holy fuk.

[usmc_drifter]

Dude, you put coilovers and possibly other unmentioned suspension modifications into your car. Its going to be stiff. Its going to be a rough ride. Perhaps you should have done more research.

If you've ever driven a fully prepped race-car, you'll find that they are very solid and not fit for driving on a street where there are many inconsistencies in the road. Race Tracks are maintained to a higher standard than public roadways.

[usmc_drifter]

im filipino.

Well damn, there's your problem. kumusta ka bro?

[titaniumbmx]

the preload is probably your issue, i just fixed the same problem on evilgenius' car.
the guy who installed his megans did it wrong and there was no preload at all. infact the coils were not even seated when the suspension was drooped on the jack. if the stance coils are adjustable the way the megans are (preload and height indipendently) then you have to preload the spring and then adjust the height using the threaded shock body.

[Geezy]

University of Santa Monica California?? lol
Or no shit USMC?? Semper.

help me understand... cause im not sure how adjusted the preload on the springs.
yes i did use the shock body to adjust the height.
so how do i adjust the preload so that its "normal"

[aznpoopy]

move the spring seat until it is just touching the spring at full droop (i.e. when the corner is completely unloaded), but NOT compressing the spring. i.e. you want the spring just barely captive between the top mount and spring seat.

then re-adjust height via lengthening/shortening the shock body as you seem to have done before, since reducing preload will lower the corner.

[Geezy]

very well. let me restate to make sure i understand.

adjust the spring perches so that they just hold the springs in place with no tension or compression on the springs.
and then adjust ride height via threaded shock body.

[aznpoopy]

you got it man

[mmdb]

That doesn't sound right. If the rear spring is 6kg it shouldn't be as bad as you say. Make sure they are indeed 6kg. Also check to see if you're car is riding on the bump stops. It could be that the shocks are bottomed out. Also, do not add any preload on the spring. Just enough for you to tighten the collar to hold the spring in place on the damper. The tires won't make the ride so much harsher. I'm running a 285/30/18 with a 7kg spring and it's not bad as you describe.

when i hit little pot holes, it feels like it doesnt absorb it at all.
if feels like those rhythmic jumps you see on motocross.
like a pebble being skipped on water.
sure, they're coilovers and their supposed to be stiff.
but this shit feels BAD.

If the shock doesn't extend and the car just drops into the bump it sounds like your rebound dampening is too high. If you've dialed it all the way out and the suspension still rides extremely harsh it could be that those shocks are defective. To me it sounds like they're way overdampened.

[Persona]

Preload, its the issue trust me. Now go wrench and fix it.

[Geezy]

workin on the problem now. THANKS GUYS.

[Geezy]

it was what everyone suspected. it was a preload adjustment problem. you guys are the shit. thanks. rides MUCH better now.

[usmc_drifter]

University of Santa Monica California?? lol
Or no shit USMC?? Semper.

help me understand... cause im not sure how adjusted the preload on the springs.
yes i did use the shock body to adjust the height.
so how do i adjust the preload so that its "normal"

marine corps