How to permanently disable VSA?
04-09-2010, 08:42 AM
#63
trinydex I think you're thinking VSA is a traction control system such in an STi or EVO, in which case it's very different in nature. VSA doesn't simply just brake in your rear end. If this was the case I would see your concern.
If say making a right U bend type turn, and you induce oversteer VSA acts in this fashion:
- If you break the spectrum of allowable yaw and/or steering input, those sensors will trigger the need for VSA
- In a s2000 oversteer right hand turn, the VSA will brake/reduce power to the left rear wheel and increase the torque on the rear right. It's function is to re-equalize grip by letting the car pull itself back into the line you were trying to take. It's not a universal braking, it's re-distrubiting power to the inside wheel to grab the rear on the inside of the turn to straighten out the back end. For simplicity sake, lets say you have a yaw range of 10-20, you enter too fast at say 25 units. When VSA kicks in and finishes its job it should return you to say a 16-17 to keep you from floating on the edge of continually engaging VSA.
If say making a right U bend type turn, and you induce oversteer VSA acts in this fashion:
- If you break the spectrum of allowable yaw and/or steering input, those sensors will trigger the need for VSA
- In a s2000 oversteer right hand turn, the VSA will brake/reduce power to the left rear wheel and increase the torque on the rear right. It's function is to re-equalize grip by letting the car pull itself back into the line you were trying to take. It's not a universal braking, it's re-distrubiting power to the inside wheel to grab the rear on the inside of the turn to straighten out the back end. For simplicity sake, lets say you have a yaw range of 10-20, you enter too fast at say 25 units. When VSA kicks in and finishes its job it should return you to say a 16-17 to keep you from floating on the edge of continually engaging VSA.
04-09-2010, 08:51 AM
#64
Originally Posted by whiteflash,Apr 9 2010, 11:42 AM
VSA will brake/reduce power to the left rear wheel and increase the torque on the rear right.
04-09-2010, 09:34 AM
#65
My apologies, you are correct. What I meant by that, is seemingly that since one wheel is breaking then the inside wheel would be producing more than the outside. My wording was definitely off.
btw, when I say power I'm referring to torque just to be clear
btw, when I say power I'm referring to torque just to be clear
04-09-2010, 04:14 PM
#68
Originally Posted by trinydex,Apr 9 2010, 07:05 PM
this is false. misinformation.
Originally Posted by trinydex,Apr 9 2010, 07:14 PM
vsa only engages in very tight cornering situations, where i have plenty of grip, but steering angle is fairly severe.
04-09-2010, 04:19 PM
#69
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i don't understand how you can tell me my experiences are wrong... maybe you should read from the beginning of the thread.
i'm not saying that vsa ONLY engages in very tight cornering situations for everyone else. i'm continuing a conversation i've been having from previous pages where i'm diagnosing why the vsa is engaging in what i would consider undesirable situations.
i'm not saying that vsa ONLY engages in very tight cornering situations for everyone else. i'm continuing a conversation i've been having from previous pages where i'm diagnosing why the vsa is engaging in what i would consider undesirable situations.
04-10-2010, 07:49 AM
#70
Im not 100% sure which the s2000 uses, if its yaw based, steering angle based, or perhaps both. I'm sure someone can answer this, I was speaking more in terms of how VSA systems work. dammitjim do you know the answer to this? one of the other or both?