Quote:
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Originally Posted by Stang70Fastback
If you turn the steering wheel, and the front wheels lose grip, that will be immediately identified by the car, as it won't "feel" the car turning as hard/quick as it should be. Basically the car says, "We are going 30 MPH, and he just turned the wheel XXX degrees. My math tells me that should result in YYY G's of lateral force, and we should be turning at ZZZ degrees per second. But my sensors are reading much lower numbers, so clearly the front tires aren't turning us as much as they should be." So it responds by doing a whole host of things. It can cut throttle, which helps shift more weight back to the sliding front tires. It can also brake your inside rear wheel, which helps to "drag" the car around the turn, to help it turn better. It continues to do this until everything checks out, and the car is pointing where the driver wanted it to point.
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Quote:
Originally Posted by Stang70Fastback
Nope. It treats both ends equally. It shouldn't even allow a fraction-of-a-second of slip without stepping in. When I put my floppy winter tires on the car, I can cause the stability control to freak out just by gently swerving back and forth. The front end isn't actually losing grip, but the winter tires are so floppy, and deform so much more than summer tires, that the extra split second it takes for the car to actually start turning makes the stability control THINK the front end has lost traction, and it brakes the rear wheels to compensate. I even have video of it.
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Hmmm... maybe my traction control really
is malfunctioning or simply not working for my front wheels.
I started to suspect something after
replacing my rear wheels with Continental DWS 06. Going over a few rough patches on the highway (50+ mph) caused the traction control to kick in, similar to your video. This is with the brand new DWS 06 on the
rear wheels and the worn out Michelins on the fronts (the same Michelins I slid around on last night). I then switched the Continentals to the front & put my worn out A/S 3's on the rears just to see what would happen. And going over those same spots on the highway (at the same speed), the nannies never intervened! Heck, I even starting accelerating & speeding over those same rough spots just to try to induce the nannies to come out. For whatever reason, my car's nannies just trusts Micheline tires more than they do the Continentals haha.
Aside from the nannies issue, I just didn't like how 'lazy' & numb the DWS 06 made my steering feel. So I ordered 2 Pilot Super Sports to replace them. (*Side note: To answer your previous question about only getting 2 MPSS tires) I always only get 2 tires initially if I've never had experience with them before.. for this exact reason. I bought the DWS 06 because of the great reviews on here and other sites = totally failed for me. The only positive here is that I didn't buy four of them! I hardly thought the MPSS would fail the same way, but I've never had them on my car before so I had to make sure (they're great btw
).
Anyway, I'm digressing. And I'm not too worried.. I was only slightly curious. I'd be relieved if the nannies really aren't monitoring my fronts lol. I'll soon have another pair of MPSS for the front wheels so I'm just going to enjoy the understeer slide in the rain while I can
(while no other cars are around of course).
Thanks for the informative write-up on the ABS, Traction, & Stability Controls too btw!