Hi all, I searched and saw threads that talked about ABS overreacting with REVOS (I happen to have revos, and I happen to love them ) but I read that to mean that the ABS activated sooner or stronger than with other tires out there.
What I have happening is different and I have sensed it for some time on regular pavement but the last two days or so we have had lots and lots of sheet ice to play on and I've really got the feel of the problem:
Driving over long smooth stretches of ice and purposely hitting hard on the brakes gets the ABS going almost as soon as you hit the pedal, which I would expect. Once ABS is activated, the vehicle will stop with good steering control but poor braking ability, which I would not expect. I tried multiple times to really recreate one "run" after another and I am 100% sure I can consistently get shorter stopping distances with the ABS off such as what occurs with CDL activated; with the ABS off I can almost lock up the tires til the vehicle starts to skid sideways and then just let off little and get it right back to that threshold. .
The last thing is the most unexpected thing and I recreated this with both front wheels braking on ice and with one front wheel braking on ice while other is on regular pavement. I have a predictable after pulse whenever either one or both of my front wheels go from ice to pavement while braking and I'm not talkin like a split second worth but a good full second to two even. It is strange sweaty fealing and its like you cannot convince the system that it is on good ground. If as soon as the tires go from ice to pavement you let off little on the pedal, just enough to disengage the ABS, you can then hit the brakes as hard as you want and the vehicle brakes as hard as ever.
I would love to learn any theories on this. None of the obvious things stand out - no problem with pad or rotor or MC or anything and, great braking ability other than in this specific mode. Thanks.
What I have happening is different and I have sensed it for some time on regular pavement but the last two days or so we have had lots and lots of sheet ice to play on and I've really got the feel of the problem:
Driving over long smooth stretches of ice and purposely hitting hard on the brakes gets the ABS going almost as soon as you hit the pedal, which I would expect. Once ABS is activated, the vehicle will stop with good steering control but poor braking ability, which I would not expect. I tried multiple times to really recreate one "run" after another and I am 100% sure I can consistently get shorter stopping distances with the ABS off such as what occurs with CDL activated; with the ABS off I can almost lock up the tires til the vehicle starts to skid sideways and then just let off little and get it right back to that threshold. .
The last thing is the most unexpected thing and I recreated this with both front wheels braking on ice and with one front wheel braking on ice while other is on regular pavement. I have a predictable after pulse whenever either one or both of my front wheels go from ice to pavement while braking and I'm not talkin like a split second worth but a good full second to two even. It is strange sweaty fealing and its like you cannot convince the system that it is on good ground. If as soon as the tires go from ice to pavement you let off little on the pedal, just enough to disengage the ABS, you can then hit the brakes as hard as you want and the vehicle brakes as hard as ever.
I would love to learn any theories on this. None of the obvious things stand out - no problem with pad or rotor or MC or anything and, great braking ability other than in this specific mode. Thanks.
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