Thanks, I've been told that before, use the WHOLE track.

1:04-1:10 and 3:32-3:42; hardest corner(s) on track, theres actually 3 lines through there, Im not sure video shows it well, I like the inside line, others like outside My buddies and I have this arguement all the time lol, until we can get actual data, its up for debate.

Inside you can come straight in, on the gas longer, but lose exit speed. Outside people feel they can carry more speed through the turn, but I personally think its slower.


Maybe my buddies video shows it better. (first turn in video)

http://www.youtube.com/watch?v=9gJ9v...layer_embedded

Again, thanks for the input.

 

I've found that if I'm cording anything but the exact center of the tire, I need more tire pressure.

Cording 1/3 in from the loaded (generally outer) edge has usually meant that I'm severely under an optimum tire pressure (THAT was an expensive $1300 lesson!).

You need to take into account any weight differences between cars. If a lighter (2800 lb) car is running 35 PSI, putting that same tire on a 3200 lb car means that you'll need more tire pressure to compensate for the additional weight (35 * 3200 / 2800 = 40). Thankfully, it is pretty much a linear ratio, so you can get within a PSI or two of an optimum pressure, but you may need an extra PSI or two to also cover the difference in cornering forces as well.

As far as driving goes, being smooth helps you run closer to the edge, but also means that you're generally also running harder than you realize. Autocross is one of the few motorsports where you run close to 100% all of the time, most other forms you're generally running in the 80-90% range of what the equipment can do, so you can run longer. It's about managing the equipment -- if you're "running out of tire" too soon, you can generally back off 1-2% and get them to run significantly longer.

 

What if one (i.e. me) corded the inside edge? I do flip them (Hoosiers) a few times (in/out), but I think it honestly corded on the inside during the last two autoxs. Too much camber and not enough tire pressure? It was a rear as well.

 

I liked that line. I really dislike that R8 owner. Not because of his car, but because he needs to get his left hand and index finger out the window. I'm going to look for more video of the two of them.

 

Thanks for the info PDX - I was running UNDER what was recommended, and the G35 is a heavy pig.


haha Scott, we had some words about him all weekend, he was not being courteous at all.

Heres another angle from my buddy in the red mustang, following the one in the blue, and then the R8. You can see him using the whole track, hes a great driver.

<iframe src="http://player.vimeo.com/video/25709939?portrait=0" width="1080" height="608" frameborder="0"></iframe><p><a href="http://vimeo.com/25709939">Untitled</a> from <a href="http://vimeo.com/user7480148">1morelap</a> on <a href="http://vimeo.com">Vimeo</a>.</p>

 

I'm happy to see the blue Mustang ended up passing the R8 after all. I still like his (blue) line through that tricky spot. I don't like the red Mustangs line through there. You can see the blue Stang and the R8 really yank away from him because of his entry at 4:05 to when they are at WOT ~4:15, then they just walk away. It's interesting to see him catch back up a few turns later. He must be finding some time in some braking zones, though I saw him go in too hot a few times, which allowed him to catch up, but then they got back on the gas and took off while he was still braking and regaining car control. I could watch track video all day.

 

The red mustang disagrees with mine and blue mustangs lines through that corner, we argued about that line all weekend inside vs. outside

All in good fun.

 

Too much negative camber in the rear coupled with spinning the tires too much...

 

+1. Ruff Z beat me to it.

 

Agreed. Track car set-up used in autox; not ideal. Could still probably take out some rear camber.

 

Your pressures are to high. The Continentals should start at 22 cold and 28 hot.