The local chapter of the BMW Club of America - BMW Club Atlantic - arranges one or two Advanced Driver Training weekends every year (HPDE's). That's where I started high performance driving nearly 8 years ago and where I made great friendships so I always look forward to it. I was just getting ready for the driver's meeting at the last event when one of the event's organizers came to me and said: "We have someone who needs an instructor. Can you take on a second driver?" (I was already assigned another 'student'; a guy with a 525 hp Saleen Mustang. You can read my track review for that one here ). I said: "Sure," so they assigned me this new student and I looked for their car on the driver/instructor assignment sheet. It was a 2015 Golf. I assumed it was a GTI because that's the first one that comes to mind when you hear of a Golf on track. But I looked at it, and it was very clearly not a GTI. I thought it must be a 1.8 TSI, the ...
I'm finishing up a comparison post (link to introduction: Intro: Focus RS vs Golf R vs WRX STI vs Evo X ) and, throughout the post, I realized that I have to go off topic a lot to talk about how each type of differential changes the way the car drives. As a result, I thought I'd write a separate post to go into more detail before I post the comparison to keep it more focused on the cars and avoid veering off topic too much. By saying "Limited Slip Differentials" in the title, I am including torque vectoring diffs because, although current conventional terminology treats them differently, a torque vectoring differential is, in essence, a very sophisticated limited slip diff (LSD) that can be manipulated to actively help the car handle better. And while none of the cars in the comparison use open (without help from the brakes) or non-gear mechanical LSD’s, I’ll briefly discuss them so that the post is more inclusive. I’ll only focus on using power to help the...







