Quote:
Originally Posted by Porsche
That is correct in a NORMAL setup, a setup employing either a properly functioning front/rear brake proportioning valve, or an EBD computerized system. (Electronic Brakeforce Distribution).
Doing the pedal dance creates an ABNORMAL setup; the EBD is now disabled. The EBD was there for a good reason. It was to create the stable balance you describe as true of "any front engine car."
But, we've just turned it OFF. Your description may no longer be applicable.
That changes things. There could be unintended consequences if the rear brakes are now getting the same hydraulic pressure as the front brakes. Due to weight transfer under heavy braking, the fronts can tolerate a great deal more braking pressure before locking up than can the lightly loaded rears.
(I know you know this, Orbital, I'm elaborating a bit for the benefit of some of our readers who may be less familiar with these issues.)
On another note, it's interesting to see that a number of autocross competitors who have tried the pedal dance have found it to be counterproductive, creating worse problems than the one they were trying to solve. A number of those competitors avoid the pedal dance.
I suspect their experience may be due to the very sharp corners they encounter where they hike their inside hind leg (wheel) well up into the air, thus locking it up under braking, which then gets the ABS system riled up. It doesn't like that. Mike, on the other hand, is driving through much larger radius corners on road courses where I suspect he has both rear wheels rolling on the ground.
I'm just speculating about all this stuff.
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I actually generally drive over every berm and bump; this is where good suspension comes in.
However, if I don't do the pedal dance, VSC/TC will kick in virtually every time there's even a HINT of wheel lift. Additionally, I can't trail brake without the pedal dance.
Autocrossers generally brake deep, rotate, and power out, due to the nature of their setups (they favor quick small direction changes and fast response, over static cornering grip; this is MASSIVELY beneficial in slaloms, but at the cost of heavily pushing in sweepers). This makes it so they don't run into the trail braking problem that I have.
I can't count the number of pictures of my car (and most cars I drive) on two wheels.
These pictures are at different corners.
CSG David:
Me:
