ABS Failure on the track - root cause
05-07-2009, 11:05 AM
#31
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Well, it should and will do more than just protecting crappy drivers... but I do completely agree, we should all be more than capable of driving without it. Hell, I work on the systems, and have no ABS in either my street or race cars! 'Course, they kinda predate it... 
05-07-2009, 12:54 PM
#32
Three Wheelin'
No, it was out all weekend. I could reset the ABS and PSM warnings by turning the car off and back on, but the moment I braked hard again, the warning lights would come back on, and ABS would not engage.
Just to clarify the role of the brake light... the fuse protects the entire brake light wiring harness, and technically, it's the fuse that gets blown. Agreed, it sounds weird to simplify it down to the "light".
I'd be interested in other theories for simultaneous ABS failure, a busted bulb socket, and two blown fuses. And if the cost of the replacement wiring harness is considered, that alone should qualify it as a part of a sophisticated, modern ABS system.
Just to clarify the role of the brake light... the fuse protects the entire brake light wiring harness, and technically, it's the fuse that gets blown. Agreed, it sounds weird to simplify it down to the "light".
I'd be interested in other theories for simultaneous ABS failure, a busted bulb socket, and two blown fuses. And if the cost of the replacement wiring harness is considered, that alone should qualify it as a part of a sophisticated, modern ABS system.
As it pertains to racing and using a modified street car there will always be cases where it still functions properly and those where it does not. The modifications can be such a large departure than the design specification that functionality is completely useless. Considering the current options the safest measure is to disable it for track use and rely on the driver to make the correct inputs.....but this could potentially change in the near future. Fingers crossed.
05-07-2009, 03:09 PM
#34
Three Wheelin'
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I have raced with and w/o ABS in various classes and venues. I will always take ABS over non-ABS. I've even driven a couple of the earliest variant Porsche racing ABS systems and have been able to "over brake" or "go through the ABS" enough to cause it to kick the circuit breaker. Those versions all defaulted to standard braking, although it was little disconcerting to realize in the middle of threshold braking for the old hairpin at Sebring that the ABS was "off."
