Uneven Active Handling?
Thread Starter
Pro
Joined: Jun 2005
Posts: 693
Likes: 2
From: Los Angeles CA
Uneven Active Handling?
I just noticed while driving through the local Angeles Crest Highway that the active handling limits seem to be uneven for right and left turns. I especially noticed this with quick jerks of the steering to simulate mini lane change maneuvers.
When I jerk the steering to the right and back, active handling displays even at moderate jerks. When I jerk the steering to the left and back, active handling never kicked in. I set to competitive mode and the results are the same.
I guess I did not try steering hard enough to the left to activate the active handling, but it sure does come on easily turning right. Even on extended loaded turns, the right turns are more sensitive to activate active handling than it does on left turns (rarely activates).
Does anyone else have this uneven limits on their active handling or is there something wrong with mine or maybe it's an alignment issue? (just had an alignment done few months ago, though...)
When I jerk the steering to the right and back, active handling displays even at moderate jerks. When I jerk the steering to the left and back, active handling never kicked in. I set to competitive mode and the results are the same.
I guess I did not try steering hard enough to the left to activate the active handling, but it sure does come on easily turning right. Even on extended loaded turns, the right turns are more sensitive to activate active handling than it does on left turns (rarely activates).
Does anyone else have this uneven limits on their active handling or is there something wrong with mine or maybe it's an alignment issue? (just had an alignment done few months ago, though...)
Team Owner
Joined: Oct 2001
Posts: 56,377
Likes: 79
Considering the road is different each time you try this it doesn't seem to be a very scientific analysis. Also, the left side of the car is more heavy due to you and the transfer of gasoline from the passenger to the drivers side tank.
Fill the tanks up, add a pasenger and do your test again.
Fill the tanks up, add a pasenger and do your test again.
Thread Starter
Pro
Joined: Jun 2005
Posts: 693
Likes: 2
From: Los Angeles CA
Tire pressures are 30 all around, 32~33 warmed up.
I thought about the uneven weight distribution, but still there is too much difference in the active handling sensitivity. Just tried it this morning coming to work, even a small quick jerk to the right displayed active handling.
Will try with full tank of gas + passenger, but I don't think it will matter as much with the small quick steering inputs I am applying for this test.
Can somebody try it in their car and let me know if they are experiencing this? Really doesn't take a dangerous lane change maneuver, just a quick input and straighten in your own lane when nobody else is around...
I thought about the uneven weight distribution, but still there is too much difference in the active handling sensitivity. Just tried it this morning coming to work, even a small quick jerk to the right displayed active handling.
Will try with full tank of gas + passenger, but I don't think it will matter as much with the small quick steering inputs I am applying for this test.
Can somebody try it in their car and let me know if they are experiencing this? Really doesn't take a dangerous lane change maneuver, just a quick input and straighten in your own lane when nobody else is around...
Le Mans Master
Joined: Sep 2004
Posts: 5,707
Likes: 4
From: Los Angeles
Tire pressures are 30 all around, 32~33 warmed up.
I thought about the uneven weight distribution, but still there is too much difference in the active handling sensitivity. Just tried it this morning coming to work, even a small quick jerk to the right displayed active handling.
Will try with full tank of gas + passenger, but I don't think it will matter as much with the small quick steering inputs I am applying for this test.
Can somebody try it in their car and let me know if they are experiencing this? Really doesn't take a dangerous lane change maneuver, just a quick input and straighten in your own lane when nobody else is around...
I thought about the uneven weight distribution, but still there is too much difference in the active handling sensitivity. Just tried it this morning coming to work, even a small quick jerk to the right displayed active handling.
Will try with full tank of gas + passenger, but I don't think it will matter as much with the small quick steering inputs I am applying for this test.
Can somebody try it in their car and let me know if they are experiencing this? Really doesn't take a dangerous lane change maneuver, just a quick input and straighten in your own lane when nobody else is around...
Thread Starter
Pro
Joined: Jun 2005
Posts: 693
Likes: 2
From: Los Angeles CA
Yes, then it sounds like mine has a problem. It is really small movements, not really an emergency type lane change. Even moving at 20~30mph, if I quickly jerk steering to the right (car not actually even having time to move right) it displays it.
Car is out of warranty (45,000+ miles), so would it be worth it to even take to a dealer?
I have seen sustained 0.85g (HUD) on a tight right hander up in Angeles Crest Highway roads without it kicking in if my input was smooth, so it only seems to not like sudden movements of the chassis/steering...
Car is out of warranty (45,000+ miles), so would it be worth it to even take to a dealer?
I have seen sustained 0.85g (HUD) on a tight right hander up in Angeles Crest Highway roads without it kicking in if my input was smooth, so it only seems to not like sudden movements of the chassis/steering...
Melting Slicks
Joined: Dec 2006
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I have had the Hud up to 1.07G on a right hand turn offramp and NO Active Handling activation. Car was not sliding at all so it makes sense it didnt kick in.
Sounds like maybe your yaw or steering position sensor are giving false readings. Or a wheel sensor is giving the wrong info.
I can get the AH to kick in by quick movements of the steering wheel/ quick turns , but the car does have to slide before it activates, it does not activate before the slide starts.
Sounds like maybe your yaw or steering position sensor are giving false readings. Or a wheel sensor is giving the wrong info.
I can get the AH to kick in by quick movements of the steering wheel/ quick turns , but the car does have to slide before it activates, it does not activate before the slide starts.
Le Mans Master
Joined: Dec 2004
Posts: 5,492
Likes: 807
From: West coast CA
I can get Active Handling to kick in -- repeatably -- when not necessary; that is, when there's plenty of grip available to perform the same maneuver without AH enabled. However, under these circumstances it doesn't actually do much -- just displays on the DIC and activates the ABS valves (you can feel it) but it isn't doing anything dramatic.
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Thread Starter
Pro
Joined: Jun 2005
Posts: 693
Likes: 2
From: Los Angeles CA
Seems like you guys can also get the active handling to display with quick jerks of the steering, so maybe that's normal.
But I would like to know if one side is more sensitive than the other, that was my original concern. Sorry I deviated from the uneven AH sensitivity concern, which is what I am worried about. Can you guys test it again to see if similar jerks to the left and right both displays the Active Handling or one side is more easily set off than the other?:o
But I would like to know if one side is more sensitive than the other, that was my original concern. Sorry I deviated from the uneven AH sensitivity concern, which is what I am worried about. Can you guys test it again to see if similar jerks to the left and right both displays the Active Handling or one side is more easily set off than the other?:o