posted
Is the amount of ABS feedback in the brake relative to the amount of traction the tires are getting?
i.e. The ABS working seems hardly (if at all) noticeable on clean, dry pavement whereas in low traction situations it's very obvious.
The reason I ask. I tried one run at autocross with the ABS disabled. Lot's of lock up in situations where on subsequent runs with the ABS on I didn't actually notice it working.
Perception or reality?
TIA
Posts: 4222 | From: Winnipeg MB CA | Registered: Feb 2000
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posted
One thing I remember them saying at Bragg-Smith. The electronic controls save us a lot more than we are aware. We mostly don't notice them even though they are kicking in.
Posts: 5946 | From: Litchfield, NH, USA | Registered: Feb 2000
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posted
If the ABS is kicking in, the "Lo Trac" dash light should come on. Similarly with ASR.
Posts: 107 | From: San Marcos, CA | Registered: Jun 2002
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ask Yachnin, the traction control system in our cars is the same one he put into the C4s. He knows how it works inside out.
Posts: 2441 | From: Chester, NY | Registered: Feb 2000
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I think it's reality. I remember running at Bragg-Smith and basically the same thing happening.
Posts: 5558 | From: Windsor, Ontario. Canada | Registered: Feb 2000
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posted
I don't believe the amount of kick-back is proportional to brake apply or slip. The newer system has much less feedback than the original vette system-too many complaints of intrusion;plus the newer system didn't intrude as rapidly as the original vette system-you could slid a little more.
Posts: 1163 | From: Rochester Hills, Mi | Registered: Feb 2000
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On clean, dry pavement, the amount of pressure the ABS system needs to release to maintain wheel rotation is very, very little.
In low traction situations it needs to release alot, sometimes almost all, of the brake pressure.
So would the amount of pressure being released affect the amount of kick-back you get?
As an aside, the fellow that drives the car that doesn't like the ABS left foot brakes, sometimes under throttle. Is it possible that this can "trip up" the ABS system?
This is all with TCS off.
Posts: 4222 | From: Winnipeg MB CA | Registered: Feb 2000
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posted
I misread the original question. My answer was directed to ASR - however, for ABS the pedal feel is almost non-existent. What happens on dry vs. wet is that the traction is so much higher on dry pavement, when ABS kicks in, your car reacts a lot more violently than on wet, where you have the tendency to slip more. Its more what you feel in your gut, or seat of the pants, than at the pedal.
Posts: 1163 | From: Rochester Hills, Mi | Registered: Feb 2000
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posted
Another question for Jeffy on ABS, if I can.
Several years ago there was a problem with the ABS syatem on my car that caused it to shut down (cut insulation to one of the front wheel reluctors). When it did this all out braking got very very interesting.
It felt like full pressure was going to all the wheels, the result being that the back brakes locked up eary with LOTS and LOTS of axle hop.
It seemed to me that the system does this intentinally; that is send full pressure to all brakes and them let the ABS system sort out which wheel needs pressure relieved to avoid look up.
Am I correct in my theory here??
Bill M 98 TA
Posts: 383 | From: Oakville, Ontario Canada | Registered: Jan 2003
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