worldtraveler13

Eric that must be a very fun road to drive! I used to live in S. California and I remember those canyon roads! Back then I had a modified boxster S with 400hp and it was an amazing experience to drive those roads. The weather of course helped a lot!

eric strauss

Probably no better car to hustle through the canyons… they handle so great. You'll have to visit again and know you have a friend here for a drive :-)

Eric

worldtraveler13

Thanks Eric. I will let you know when I'm out there, usually I'm going to OC area!

Tracy Thomas

i have a 2013 rs5 when i back up & start turning the vehicle jerks is that normal?

J. Patterson

Google "Ackerman angle tire hop". You'll learn all about why it happens.

worldtraveler13

Yes Tracy it is normal.
Here you can read more about it: https://en.wikipedia.org/wiki/Ackerm...ering_geometry

superswiss

Well, I was gonna say to have your alignment checked Tracy. For those referencing the Ackerman steering geometry, it actually is supposed to eliminate this and not cause it if the Ackerman angles are correct. I suspect in Tracy's case her toe is off, messing with the angle. My RS5 doesn't jerk when I back up and start turning. I had it aligned less than a year ago. In case of quattro in particular older generations there is also the phenomena of differential bind if the steering is turned all the way to the left or right. However, that has been greatly reduced with the the crown gear diff in the RS5. I don't feel this much anymore in my car, but my B7 S4 did it all the time and the tires skipped whenever I backed out of my driveway.

J. Patterson

The tire hop-- drag is because the cars DO NOT have true Ackerman geometry. Higher performance cars often have reduced or even negative Ackerman correction in order to maximize tire grip in high speed cornering. (Or so I read :-) ) It is a function of the length and angle of the steering arm on the hub carrier and the position of the steering rack relative to the wheelbase of the vehicle. Long story short the inner front wheel is not turning sharply enough when turning sharply and it forces the outer wheel to skip sideways. Alignment cannot change this much. It is a designed in part of the suspension.

superswiss

Yeah, I'm aware of this. Didn't wanna get too deep into the weeds. But yes, the Ackerman angles get messed with by things like tire deformation in high speed corners etc. that the suspension geometry and steering geometry tries to take into account. It's still worth getting the alignment checked, although it seems that the tire hop is more pronounced in colder climates and probably depends on the tires, too. Seems like in warmer climates the softer tire compound masks the tire hop as the tire flexes enough.

Johnny_D

Great car! Does it do 0 to 60 mph under 4,5 s?