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

dropped accord acting funny on high speed curves and other issues..

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Old Jun 17, 2005 | 07:58 AM
  #1  
owace's Avatar
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Default dropped accord acting funny on high speed curves and other issues..

I just dropped the 7th gen MT6. approximately 2.2 " all around on d2 coilovers (8f, 6r) with damping set a 1/4 turn from full stiff. i also have the 20mm rear tl sway bar (stock is 14). rear camber is -2, an -2.5. toe is minimal on each wheel at .1 or less.

now what ive noticed with this car is one

Clunking at low speeds.
and at high speeds cornering the car seems to sway around the y axis (funny yaw). the car seems to wobble around the corner, and i cant seem to figure out why.

its as if the car wants to snap back going in a straight line, adn then snap back to the direction its turning in, and it cant seem to make up its mind what it wants to do. the result im taking curves and the cars motion is a wave (sine curve, cosine curve) while taking the corner/curve.

any suggestion as to what this might be?

also, do you suppose the following might be because i set damping high?car seems to be really bouncy at low speeds going over bumps. roommate said it felt like shocks were blown, i said it could be cos dampng was set really high. i do know that with 4 people in the car (all of whom have lowered their 6th gen accords 2.2"), they said ride was great, damping perfect. and ill admit that with their weight the car did ride great. with just 300 lbs in it though, then the car really seems to be a lil bronco over bumps and undulations in the road. cars weight is roughly 3400 lbs. with those 4 ppl, it would have been 4000 lbs. with me and my roomate its at 3700lb.

would appreciate any input. thanks.


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Old Jun 17, 2005 | 08:06 AM
  #2  
PIC Performance's Avatar
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Default Re: dropped accord acting funny on high speed curves and other issues.. (owace)

The odd handling characteristics could be due to not havign an alignment done. If you have done your alignment, and the settings are correct, then I've got nothing
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Old Jun 17, 2005 | 08:09 AM
  #3  
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Default Re: dropped accord acting funny on high speed curves and other issues.. (owace)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by owace &raquo;</TD></TR><TR><TD CLASS="quote">I just dropped the 7th gen MT6. approximately 2.2 " all around on d2 coilovers (8f, 6r) with damping set a 1/4 turn from full stiff. i also have the 20mm rear tl sway bar (stock is 14). rear camber is -2, an -2.5. toe is minimal on each wheel at .1 or less.

now what ive noticed with this car is one

Clunking at low speeds.
and at high speeds cornering the car seems to sway around the y axis (funny yaw). the car seems to wobble around the corner, and i cant seem to figure out why.

its as if the car wants to snap back going in a straight line, adn then snap back to the direction its turning in, and it cant seem to make up its mind what it wants to do. the result im taking curves and the cars motion is a wave (sine curve, cosine curve) while taking the corner/curve.

any suggestion as to what this might be?

also, do you suppose the following might be because i set damping high?car seems to be really bouncy at low speeds going over bumps. roommate said it felt like shocks were blown, i said it could be cos dampng was set really high. i do know that with 4 people in the car (all of whom have lowered their 6th gen accords 2.2"), they said ride was great, damping perfect. and ill admit that with their weight the car did ride great. with just 300 lbs in it though, then the car really seems to be a lil bronco over bumps and undulations in the road. cars weight is roughly 3400 lbs. with those 4 ppl, it would have been 4000 lbs. with me and my roomate its at 3700lb.

would appreciate any input. thanks.</TD></TR></TABLE>

with the damping set high, it shouldn't feel like a shock is blown--if it's stiff rebound damping, after an oscillation in the spring, it should feel like the car is being yanked back to 0 displacement on the spring. when the damping is too low, or a shock is blown, the car will tend to float--you'll hit a bump and the body of the car will accelerate freely in a direction without any resistance from the shock. it's hard to describe in words, but is the car floating or is it jerking?

the inconsistent steady state cornering could be a few things. You may wanna check all your suspension bolts and make sure they're tightened to spec--esp the sway bar collars and endlinks in front and rear. it also could be a result of whatever your shock situation is--when underdamped and midcorner, the compression of the spring and underdamping of the spring's movement could create a reoccuring bumpsteer situation which may be what you're experiencing.

as i type this i realize that it very well could be your shocks. are you sure you are turning them the right direction to stiffen? any fluid leaking? custom spring rates? try driving around with the shocks at full stiff and see what happens.

the low speed clunk sounds like a swaybar issue to me. see if they're hitting anything, or if the endlinks check out.
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Old Jun 17, 2005 | 08:48 AM
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Default Re: dropped accord acting funny on high speed curves and other issues.. (bad-monkey)

Many people mistaken a very stiff ride with a bouncy ride because they can feel every imperfection in the road.
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Old Jun 17, 2005 | 10:10 AM
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Default Re: dropped accord acting funny on high speed curves and other issues.. (JDMmaster)

My friend experienced this in her 91 accord. Consequently she spun out on a freeway on ramp, and got hit by a moving truck. She was okay, but it wasn't very cool at all...
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Old Jun 17, 2005 | 11:10 AM
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From: Holyoke, MA
Default

thats what im worried about that i might be mistaking a stiff ride with blown shocks.

got an alignment done, only the camber is off in the rear as mentioned.

will most probably check all bolts and suspension linkages on the car come this weekend or the next.

clunking..im trying to figure out how to get the sway bar to move, but i cant so i guess im a little lost, save posting a camera to record the suspension movt.

im definatly 1/4 turn from stiff. if i move it to full stiff, i can barely push down on the car at any corner. turning the other way and the car acts like a jack in the box.

based on the situation of 4ppl vs 2ppl, vs just me in the car, do you think im overdamped?

in either case, im going to rework the suspension settings once i can get more input from yall, and a couple of other ppl i can talk to.

once i get that down, i head to a empty parking lot to put that advice to use.

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Old Jun 17, 2005 | 12:30 PM
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From: Off THE 60, Between THE 605 and THE 57
Default Re: (owace)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by owace &raquo;</TD></TR><TR><TD CLASS="quote">thats what im worried about that i might be mistaking a stiff ride with blown shocks.

got an alignment done, only the camber is off in the rear as mentioned.

will most probably check all bolts and suspension linkages on the car come this weekend or the next.

clunking..im trying to figure out how to get the sway bar to move, but i cant so i guess im a little lost, save posting a camera to record the suspension movt.

im definatly 1/4 turn from stiff. if i move it to full stiff, i can barely push down on the car at any corner. turning the other way and the car acts like a jack in the box.

based on the situation of 4ppl vs 2ppl, vs just me in the car, do you think im overdamped?

in either case, im going to rework the suspension settings once i can get more input from yall, and a couple of other ppl i can talk to.

once i get that down, i head to a empty parking lot to put that advice to use. </TD></TR></TABLE>

4 ppl vs. 2 ppl is simply a question of sprung weight vs. unsprung weight.

http://en.wikipedia.org/wiki/Unsprung_weight

stiff ride definitely feels like someone is throwing you around or actively shaking the car up and down--underdamped feels like a stone skipping over water, a sort of floating feeling and "slower" bounces.

another thing i thought of: how old are your suspension bushings? if there's alot of miles on them and they've degraded it could lead to some funky behavior while that side of the suspension's under load.
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Old Jun 17, 2005 | 12:44 PM
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owace's Avatar
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From: Holyoke, MA
Default Re: (bad-monkey)

hmm ok, well the car only has 10000 miles on it, and is only a year old.

and the coilovers were put in 2 weeks ago.

car definately does not have a floaty feeling, just a lot more jerky over bumps at speeds under 30 mph, hits bump goes up and rebounds twice (bouciness i thought was blown shocks)..

so right i understand the concept between sprung and unsprung weights. however im still lost as to why the car behaves with higher sprung weight in it, and misbehaves with less weight in it. btw i also preloaded my springs a tad bit. about 2 threads more than just tight enough to prevent the springs from rotating.

once again thanks for the running input.

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