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Old 01-29-2012, 09:13 PM   #1
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Interesting topic... I think I have the reverse of the TS....

At high speeds if I brake hard, on my front brakes, the abs actually sometimes allows the tires to skid (???!!!) slightly, usually just one sound then no skidding but no abs as well. If I step any harder, the ABS will kick in. The skid usually last a split second to at most a second.

I've changed abs sensors on all 4 brakes and even changed the front brakes to the S brakes, but it still behaves the same.

It's as though I've got "lazy" abs that is pretty slow in engaging.

My mechanic says its normal as "Porsche determined this way you get the most effective braking". Don't know whether to believe him or not ?? I've never had a car with abs that allowed any skidding !

My front tires are PS3 and the rears are N specs PS2, if that makes a difference.

Any thoughts ? I hope it's not the abs unit... those things are expensive !

Last edited by shlim8; 01-29-2012 at 09:20 PM.
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Old 01-30-2012, 06:41 AM   #2
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An every so slight skid; whining of the tires is where you want to be for the best stopping distance. Getting right into the ABS is less effective.

Should you not have ABS, you will have to come off the brakes to "break and avoid" an obstacle or you will slide into said obstacle
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Old 01-31-2012, 12:06 AM   #3
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I'm not sure if I would describe mine as "slight skid" or "whining of the tires" - its a loud loud skid. But its not a sustained skid. As I mentioned, 99.99% of the time, the abs doesn't come on after that (if no increase in brake pedal pressure).

It's embarrasingly loud.

I did have a sustained skid once with the tail swinging out, but since changing the abs sensors and the engine mount (that seem to affect stability quite alot), haven't happened again. That time was on an emergency emergency stop at lower speeds even...

Quote:
Originally Posted by jaykay View Post
An every so slight skid; whining of the tires is where you want to be for the best stopping distance. Getting right into the ABS is less effective.

Should you not have ABS, you will have to come off the brakes to "break and avoid" an obstacle or you will slide into said obstacle
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