Close Call at South Bend

[bman]

I was comparing laps between last month's Zone 2 event and the David Murry event from this week. Unfortantely, I had a connection problem with my Smarty Cam and didn't get MPH, RPM's, throttle, etc... at David Murry. It recorded lap times but without the other data it was hard to compare segements.

In any case I found this interesting clip from Zone 2 where I come close to losing it in T10. See 1:15. It was only my 2nd event in the GT2 and even though it looks innocent on the video, it was a close call. I had TC on but SC off. I lost my MoJo for the rest of the session and came in early. It turned out to be a decent lap but this was the session where I intended to put down something quicker.

Sorry for the poor editing, I intended to edit it to a single lap but somehow I extended it for a lap and 1/2.

[FTS]

Brian, that is definitely a close call on T10 IMHO. I know how that feels, I had it on the CS couple of times at lower speeds, that would definitely rattle me up too.

As a side note, if you had data to trace out, I could show you exactly how to cut down probably another 3 secs, just on the screen and you'd be amazed. I am not saying this because I am faster, I certainly am not, but you have this nice, calm and calculated driving ability that I know you could just smash your times down without additional risks. It would all show in the data. I don't have your calmness and fluidity, so I struggle to execute on what I know I should be doing. Ohhh how I wish I could show you... Get a data logger!!!

[bman]

Originally Posted by FTS

Ohhh how I wish I could show you... Get a data logger!!!

I believe you and I am considering adding a logger.

Did you see Grassroots this month? Peter's article. I'll be reading it again!

Okay, I am being yelled at "get off the computer....it's time to go to brunch"

[FTS]

Yes, of course I read it, good tid bits. You should see the analysis he did on my driving from the same event, priceless

[SH || NC]

You tracked out, put a wheel on the strips, and the rear end got loose? Maybe due to wetness? It looked kinda damp. Looks like you caught it smoothly. What kind of set up are you running?

South Bend is such a pucker area, but I love it.

[TRAKCAR]

Ha, you edit film? I'm too laze, I upload the whole thing ;-)

Nice, fast driving!
Looks like you just got on some dirt or wet, did not drop a wheel I think, but could be. You caught it nice and smooth.

[930man]

looks like just a weight shift .. more gas coming outta there~!!
Try a lil later turn in @the 2 entrance turns of the esses...@ the 48 sec mark seams to mellow the whole esses some ... just a opinion

[landjet]

Brian, that looked more like a hiccup than a close call. I too thought you dropped a wheel as you were very close to the edge.

[bman]

Originally Posted by SH || NC

What kind of set up are you running?

Pretty much stock '08 GT2 but with re-ramped diff and steel brakes. R6 tires in this run.

Originally Posted by TRAKCAR

Ha, you edit film? I'm too laze.

Too busy is probably more accurate! Too busy driving that is......

Originally Posted by 930man

Try a lil later turn in @the 2 entrance turns of the esses...@ the 48 sec mark seams to mellow the whole esses some ... just a opinion

Lower esses? Yeah, I am not hitting my marks evertime through there. Trailing throttle and rotating the car at that turn in. Ironically my low polar moment Cayman would rotate more than the GT2. I am assuming it's due to the more aggressive diff but I am not sure.

Originally Posted by landjet

Brian, that looked more like a hiccup than a close call. I too thought you dropped a wheel as you were very close to the edge.

There was some mud on the curbing and I just dropped a small piece of the tire off. I could really feel the car wanting to twist from the change in grip. Several people, who have lost it there, told me the spin was too fast to catch. I was lucky....

[FTS]

Originally Posted by bman

Ironically my low polar moment Cayman would rotate more than the GT2. I am assuming it's due to the more aggressive diff but I am not sure.

Or weight; your GT2 is probably somewhere between 250-350 lbs heavier than your CS.

[bman]

Originally Posted by Dell

I'd have to concur with Matt (930man) on the weight shift. Looks like you were not on the power soon enough to get rear traction. .

I wasn't clear on Matt's input because he mentions the 48 second mark which was the entry to the lower esses. But I think the same applies....I need to take advantage of the rear grip. I've never driven a 911 before, let alone one this powerful, so there's much to learn and understand.

During my track walk last week the pro driver insisted that you touch the left curbing in T10. If not, you'll track out too wide and won't be able to apply full throttle or open the wheel soon enough. I was intentionally staying off the curbing, so I've got work to do in that corner.

Originally Posted by FTS

Or weight; your GT2 is probably somewhere between 250-350 lbs heavier than your CS.

She is a bit piggy!

[TRAKCAR]

Luck is good!

Too busy is probably more accurate! Too busy driving that is......

Very busy looking for front rotors and pad options today..

[Dell]

I'd have to concur with Matt (930man) on the weight shift. Looks like you were not on the power soon enough to get rear traction. By looking at the display data you were in the 40-50% throttle range, no? Leaving the rear end light in that track out position is what will result in the tail kicking out like that. Smooth recovery though!

FYI....my throttle application there is roughly 50% at apex leading to 100% by track out.

[Dell]

Correct, over the curbing (or as close as you can get to give max track) on the inside of T10 and graze (but don't unsettle) the curbing on track out. It's an EARLY turn-in. The later you turn in the more steering angle you must give and the domino effect of weight transfer starts to multiply quickly.

[bman]

Originally Posted by Dell

It's an EARLY turn-in .

And BLIND turn in....that's where I am struggling. Can't seem to find a consistent turn in point. I've got a tendency to over brake too, most likely due to the lack of confidence with the turn in point.

Thanks for your help!