my car is one of the lightest mkIV the 1.8t wolfsburg edition plus i removed some weight and its now floating around 2800lbs so that may help but like i said the surfaces we run on aren't exactly idea
Threshold braking is a much, much more rapid deceleration than you are used to on the street. A couple of new people I have instructed and one friend who was bedding in pads required a fair amount of urging to get beyond what they considered 'hard' braking that was actually quite mild for an autocross situation.
I did have an instructor with me during a few of my first runs, but he focused more on my steering input than anything else.
To be honest, I didn't get into the ABS at all. So now that you mention that, it's something that I really should've kept in mind: In retrospect, it'll probably shorten my braking distance significantly. I've read about threshold braking but I never thought to apply it in an autoX situation. But it makes perfect sense. Rookie mistake I guess. I will definitely keep that at the forefront of my mind while walking/driving the course. Thanks so much!
Last edited by Light on Fuel; 07-27-2012 at 02:02 PM.
Full disclosure: after doing this for years and years, I still have trouble doing what I said above And if I suddenly drop time on my last run its almost always because I realized I could brake later but harder. And of course there are times where coasting or part throttle is appropriate. But not as often as most people do it, myself included.
Don't be afraid to activate ABS as you learn your braking limits. It's much less costly of a mistake than locking up r-comps and flat-spotting them.
So I ran the event and it went really well. The only unfortunate part is that there was only one spot to try threshold braking. PCA events, I've noticed, usually sets up long, sweeping courses.
Either way, I got the rear to rotate really well an I was able to beat all the other GTi's and my cousin's 3.8l Genesis Coupe.
I'm away for August, but I'll be running again in Sept and will most likely have new questions. Thanks to all who gave valuable input, it was greatly appreciated.
I had the fronts set 1/2 a turn below full stiff. Would further lowering stiffness at the front reduce some of that mid corner understeer?
I also noticed that the temps on my front tires were way hotter on the inside shoulders than the middle and outer shoulders. I have a suspicion that the place that did my alignment screwed up. I think they may have set the toe too far out or dialed in too much neg. camber. Would either play that much of a significant role in the mid/exit understeer.
At an event, I noticed that my inside shoulders were getting too hot (20* more than outsides). I also noticed that even at 50psi, my front tires were rolling. I looked at my LCA's and realized that they had a major angle to them (car set too low). I (foolishly) didn't check the work of the people who performed my alignment and were suppossed to adjust the ride height. They had the car too low which was causing me to run out of suspension travel and roll my front tires. Since then, I've raised the ride height and am now trying to dial in the suspension.
As you've probably noticed, changing ride height impacted camper and toe also.
My suggestion is to set the ride height yourself then do a proper alignment. As I've said before, any local shop can set camber and toe to "specs" but my suggestion is to ask around at your next event and find out where the experienced auto-x guys have their alignments done. They will likely recommend someone who is a bit more expensive but it will be worth every extra cent.
Having the right equipment for a proper alignment is only 1/2 the equation, knowing how use the equipment is the real key.
I've raised the ride height and have found a shop that all the instructors use. Turns out that they're much cheaper than this other shop I've used in the past. They'll align my car with me in it and also corner weight it. I have a tough choice to make this weekend: Either go racing or get my alignment done. Even though its not ideal, I may just end up going to the event. The season's almost over so I want to try and hit the remaining few events.