very direct suspension question "oversteer" (be gentle)
#1
very direct suspension question "oversteer" (be gentle)
i tried searching a bit, but couldn't find a direct answer, so hopefully some of you guys will help me a bit. (skip down for questions)
I have noticed while driving my 03 SE (6spd) that, it has more oversteer than i am really comfortable with. (used to have a 96 max SE and 04 accord and they were...better in that regard). I have the FSTB to stiffen up the front a bit, and a RSB as well in the garage ready to go on....I read that the RSB will ENHANCE the oversteer even more, but "makes the car more stable".
1. are there any parts I can buy that will directly minimize this oversteer?
2. I planned on getting H&R and tokiko blues (if available) for my car, can anyone speak on whether this has effected oversteer on their car?
If this has been covered before I am terribly sorry. thanks for any assistance you can give me.
I have noticed while driving my 03 SE (6spd) that, it has more oversteer than i am really comfortable with. (used to have a 96 max SE and 04 accord and they were...better in that regard). I have the FSTB to stiffen up the front a bit, and a RSB as well in the garage ready to go on....I read that the RSB will ENHANCE the oversteer even more, but "makes the car more stable".
1. are there any parts I can buy that will directly minimize this oversteer?
2. I planned on getting H&R and tokiko blues (if available) for my car, can anyone speak on whether this has effected oversteer on their car?
If this has been covered before I am terribly sorry. thanks for any assistance you can give me.
#2
stock maxima should not oversteer. (if you are not confusing it with understeer)
Check if there are any loose or bent suspension parts (including worn out bushings) and take it to an alignment shop. If your car was not in a major accident and the frame was not damaged the above should salve the problem.
Edit: I would not recommend installing RSB if the car oversteers already. If you can't fix the problem using "normal" methods, you could try stiffening up your front by installing urethane bushings and LTB.
Check if there are any loose or bent suspension parts (including worn out bushings) and take it to an alignment shop. If your car was not in a major accident and the frame was not damaged the above should salve the problem.
Edit: I would not recommend installing RSB if the car oversteers already. If you can't fix the problem using "normal" methods, you could try stiffening up your front by installing urethane bushings and LTB.
#4
A stock maxima understeers heavily. Even with the RSB, there is only slight oversteer, which can easily be counteracted in various ways by stiffening up the front end (bushings, struts, springs, LTB, etc).
In your case though, you should be getting moderate understeer, stock with just a FSTB. I can't think of anything that could cause a stock + FSTB Maxima to oversteer, unless of course you're running 50lbs of air pressure in the rear tires and 25 in the front...that *might* do it.
If you are truly diagnosing oversteer correctly, the way to push it more towards understeer would be:
- stage 1/2 lower tie bar
- poly bushings in the LCA and front sway bar
- stiffer springs
- adjustable struts at stiffer settings
- higher tire pressures up front compared to back (35 front, 29 back, for example)
- adjustment of toe angle
- camber plates (camber adjustment)
#5
Just to make sure I got this correct:
understeer = the car is unable to turn because there is too much power in the front? (high torque FWD for instance)
over steer = the back end of a vehicle is breaking loose on a turn (towards the outside of the corner)
Yes i understand that those are NOT the definitions of over/under however thats the best way I can describe it, for my particular vehicle, on corners i take it feels like the back end is going to slide out (and yes my tires are at LEAST ok, though i am putting on new ones to make sure) AND in one instance it actually did slide out which caused me to go sideways into a mailbox. I never had that type of reaction out of a car ever... (and yes when i hit the mailbox i was not driving like a banshee out of hell. I do believe i might have been doing 5 over the speed limit or so?)
understeer = the car is unable to turn because there is too much power in the front? (high torque FWD for instance)
over steer = the back end of a vehicle is breaking loose on a turn (towards the outside of the corner)
Yes i understand that those are NOT the definitions of over/under however thats the best way I can describe it, for my particular vehicle, on corners i take it feels like the back end is going to slide out (and yes my tires are at LEAST ok, though i am putting on new ones to make sure) AND in one instance it actually did slide out which caused me to go sideways into a mailbox. I never had that type of reaction out of a car ever... (and yes when i hit the mailbox i was not driving like a banshee out of hell. I do believe i might have been doing 5 over the speed limit or so?)
#7
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if you dont drive in the dirt it should be hard to get the back end to swing out. maybe the back wheels bearings are bad or your parking brake is partially engaged, maybe theres something out back making the rear tires want to stop turning and therefore making it more likely to slide. you need to check everything out, it should not be that way.
#8
I got the vehicle earlier this year and thats the first thing i noticed about it, and I thought thats the way the vehicle was. Yeah I know it sounds weird that it feels like its going oversteer all the time...but thats the best way i can describe it..
#9
I think you could only meen understeer. I have eibach springs with the shocks set to full stiff, and a RSB set to full stiff and I still dont get over steer except for when I am going around quick transitions and the back end steps out ever so slightly. Its a GREAT feeling
#10
understeering = the backend wants to fly out? as far as i can feel i don't feel anything wrong with the front end going into turns, its the backend that feels like it wants to break loose and make me spin out.
#11
Originally Posted by rguida
understeering = the backend wants to fly out? as far as i can feel i don't feel anything wrong with the front end going into turns, its the backend that feels like it wants to break loose and make me spin out.
Ok if the backend is breaking loose than you've got it right, your experiencing oversteer. Understeer is when you are coming into a corner too fast and you turn the wheel and the car just keeps sliding in the same direction without turning the way you want it to.
I just have no idea how you're experiencing oversteer. I wish I had some more oversteer. I cant even make my car snap over steer by loading up the suspension going one way and than switching directions as quickly as possible. Have you checked if your rear tires are bald?
#12
Originally Posted by rguida
I got the vehicle earlier this year and thats the first thing i noticed about it, and I thought thats the way the vehicle was. Yeah I know it sounds weird that it feels like its going oversteer all the time...but thats the best way i can describe it..
If you ganna take it to an alignment shop tell them to check rear suspension alignment specs. You can't change alignment in the rear (it's a solid beam) but those spec should help you identify the problem.
#14
Check the tire pressure, if the front tires are higher pressure than the rear, there'll be a tendency to oversteer. Also check your front wheel camber, where more negative camber will cause oversteer.
Also are all 4 tires the same specs? Maybe you have shorter front tires.
Also are all 4 tires the same specs? Maybe you have shorter front tires.
#15
Originally Posted by rguida
I never had that type of reaction out of a car ever... (and yes when i hit the mailbox i was not driving like a banshee out of hell. I do believe i might have been doing 5 over the speed limit or so?)
#17
Originally Posted by rguida
i've had the tires services before by a shop that "supposedly" put the correct tire pressure on the tires. all the tires are the same company and have maybe 10k miles left on them.
#18
Originally Posted by rguida
i've had the tires services before by a shop that "supposedly" put the correct tire pressure on the tires. all the tires are the same company and have maybe 10k miles left on them.
#19
Originally Posted by Puppetmaster
Check the tire pressure, if the front tires are higher pressure than the rear, there'll be a tendency to oversteer. Also check your front wheel camber, where more negative camber will cause oversteer.
Also are all 4 tires the same specs? Maybe you have shorter front tires.
Also are all 4 tires the same specs? Maybe you have shorter front tires.
generally
-stiffen the front, you will increase understeer-
-soften the rear, you will increase understeer
-stiffen the rear, you will increase oversteer
-soften the rear, you will increase oversteer
Those are not always true, but in a general sense they are.
rguida - are you sure you're just not feeling the transition of the rear beam assembly "swinging down" on the center assembly? That sometimes gives the feeeling that the rear end is slipping, while it is actually gripping just fine. In autocross, I often feel this. Kind of wierd when you first feel it, but it's perfectly normal.
#20
Originally Posted by irish44j
rguida - are you sure you're just not feeling the transition of the rear beam assembly "swinging down" on the center assembly? That sometimes gives the feeeling that the rear end is slipping, while it is actually gripping just fine. In autocross, I often feel this. Kind of wierd when you first feel it, but it's perfectly normal.
#21
Originally Posted by sciff5
Actually I just thought of another thing. If hes running a really soft sidewall on his tires and usually shops only pump them up to 30-32 psi he could be experiencing the sidewall on the rear tires rolling on him a little which would make the back end get squirly for a second. Used to happen with my stock tires if I was being a little crazy in transitions.
#23
Originally Posted by irish44j
I don't necessarily agree there. Standard pressures up front (30-33) with higher pressures in the rear (36-37) will help the car oversteer....which is why I run my rears at mid-40s for autocross - to help the rear end "rotate" around the axis of the turn.
generally
-stiffen the front, you will increase understeer-
-soften the rear, you will increase understeer
-stiffen the rear, you will increase oversteer
-soften the rear, you will increase oversteer
Those are not always true, but in a general sense they are.
generally
-stiffen the front, you will increase understeer-
-soften the rear, you will increase understeer
-stiffen the rear, you will increase oversteer
-soften the rear, you will increase oversteer
Those are not always true, but in a general sense they are.
#25
Originally Posted by CCS2k1Max
so irish, whatever you do to the rear generally will increase AND decrease oversteer? You mean soften the rear, you will decrease oversteer.
#26
well I kinda feel like.....not smart at the moment.
I remember checking my tires a couple of months ago...apparently this is what i did...
went outside checked fronts came back in...
went outside checked FRONTS AGAIN came back in...
I went to double check tire make and lo and behold..
the front are good year, and the rear are...... "masterforce" ?!?!??????
what the hell tire is masterforce i can't even find it on tirerack.... I'm going to do the swap asap for tires...thats gotta be it at this point.....
though the thread isn't completley wasted, while doublechecking i did find the error and learned some new stuff.
"rguida - are you sure you're just not feeling the transition of the rear beam assembly "swinging down" on the center assembly?"
in regards to this, I had a 96 max SE, wouldn't that suspension have acted the same way?
I remember checking my tires a couple of months ago...apparently this is what i did...
went outside checked fronts came back in...
went outside checked FRONTS AGAIN came back in...
I went to double check tire make and lo and behold..
the front are good year, and the rear are...... "masterforce" ?!?!??????
what the hell tire is masterforce i can't even find it on tirerack.... I'm going to do the swap asap for tires...thats gotta be it at this point.....
though the thread isn't completley wasted, while doublechecking i did find the error and learned some new stuff.
"rguida - are you sure you're just not feeling the transition of the rear beam assembly "swinging down" on the center assembly?"
in regards to this, I had a 96 max SE, wouldn't that suspension have acted the same way?
#27
my car used to understeer too..when i put the kumho ecsta ASX on...i DEFINITLY NOTICE the same things..rear end feels a lot more loose...i have much less understeer more oversteer. I only have a FSTB. always had it. tires are all at 32 PSI.
#28
Originally Posted by rguida
in regards to this, I had a 96 max SE, wouldn't that suspension have acted the same way?
#29
on try pavement with decent tires(nankang ns1s) which i actually really like, if i toss her into a sharp turn, boom, rear end out.oversteer everytime. quite scary the first few times it happened. it would make sence if it was my jic's on a firmer setting along with a rsb that makes it do it. but honestly it did it stock, altho much less contorllably.
i can play with it quite a bit with my different shock adjustments. it really can be a totally different car depending on settings. even seemingly small ones
i can play with it quite a bit with my different shock adjustments. it really can be a totally different car depending on settings. even seemingly small ones
#30
With the D2 set to euhm quite stiff + 1 degree negative camber, a FSTB & RSB with all the ES Bushing, the car is on rail, but the down side is I dont know where is the breaking point. I can puch this car much more than it would have been possible when it was stock. As an example every day I drive to this road where there is a very sharp curve at the exit of a tunnel, when the car was stock I couldn't accelerate in the curve, the car would have move to the external lane and hit the wall, now I can accelerate in that curve and stay in the inside lane, the car feel planted in the ground so anyone that would be sitting beside me during the acceleration would be surprised or even scared.
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