THSCC Forums

Don't hate the playa', hate the game.

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02 Focus SVT
STF 9

What do you me "You Figured Out?? I Told You.

I agree with Chuck that the sweeper and the cone after the sweeper was the critical part not to overdrive but I thought was challenging to attempt to get right. Over driving the sweeper would force a push but get it right and I could keep the "power" down through the Cbox. Notice how the door moves on right turns....

This was my best run.
http://youtu.be/Yos1p2-m2-g

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1990 Faded Reddish CSP Lite Miata
2002 Electron Blue Corvette Z06
2005 Mazda 6 Wagon
2003 Nissan Pathfinder DTV (Dog Transport Vehicle)

That course was a lot of fun, but I couldn't get in the rhythm of it. I kept making the same mistake of running wide after the turnaround/finish chicago box. This was my fastest run from Sunday discounting the cone penalty. http://youtu.be/VtvaDX4rIH0 Caution: profanity

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2017 THSCC Autocross Chief of Timing and Scoring

03 Nissan Altima
02 Honda S2000

Rob L. Looks like you could use some sub frame stiffeners or seam welding on that car. A rollcage would do the trick also.
Also Rob Keehner unless your corvette operates different than mine, ABS does not prevent wheelspin.... it prevents wheel lock during braking. The stability control (active handling) will modulate your brakes when it detects too rapid a yaw rate(among other things) and thats why you'll be slower in comp mode than with the active handling turned off. The C5 has three modes:

Mode 1 is the default when you turn the car on. Full traction control and full active handling.

Mode 2 is one press of the button which is traction control off Active Handling off.

Mode 3 . is to press and hold for greater than five seconds This is traction control off and active handling in competitive driving mode which will give you greater tolerances for sliding sideways (what you want on a road course).That is Not What I recommend but what the manual says.



In ANY of the last two modes you will NOT have traction control...... so what ever you were feeling it wasn't traction control unless you were in the default mode.

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2004 C5(415whp,390ft/lbs),
1997C5,1997Trans Am, 1986 C4,
1990 Miata, 1976 MGB,1997 Protege, 1989 MR2

Let's figure out what happened. Are you talking about the 1st time through that section where you'll go to the left and around the turnaround? It looks like you got on the throttle coming off the center cone of the box resulting in weight transfer off the front and hence understeer. If that is what happened, why did it happen? Seriously, this can be a great learning experience for many of us who do similar things all the freaking time.

Maybe you were a tad bit slow on entry to the box and that gave your gut the feeling of "the car will take more throttle/speed here." Or that is just my biased interpretation based on crap I do all the time and try to look out for. When I'm in that situation where I do repeat a problem on course, I almost always find that I either don't have a good internal visual map of that section, haven't mentally rehearsed it enough, or I'm not looking and thinking ahead on course (and often all three of these issues wrapped up together).

Thoughts/ideas?

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Current stable:
2019 BMW M2 Competition slicktop 6MT
2011 BMW M3 sedan slicktop 6MT
2007 BMW 328i wagon (slushbox for now)
1975 CanAm 125MX2

When I did the EVO schools (as well as hearing Eric Peterson preach it) Jr and Courtney would try to pound 'shorter is faster' into my head and then finally Jr. told me to do the element where I thought a wider line with a higher exit speed was faster and he was watching the speedo and said that I did, in fact, exit about 4mph faster and entered the next breaking zone 7 mph faster (vtak-yo) but the run was 0.2s slower (did that test twice). I really struggle (still) with that though but it seems when I actually do it, I have better times.

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2011/2012 Autox VP
2013/2014.5 President
2013 Top Gun

2015 Fit

22R-EC => 4G63 => D16Y7 + D16Y8 => EJ255 + K24Z2 => K20Z3 + K24Z2 => K24Z2 + M54 => L15B

Carlton, From my armchair autocrosser point of view, it looks like you had the course pretty much figured out and your raw time showed that as it looked like the cone penalty was just a slight miscalculation in distance, rounding error. If that had been my run and my brain in my car, I would have said the first time through the C-box (around 22 seconds in) I got back in the throttle just a moment too soon or too much, as though that was to be my exit to the finish. I think the first time through the C-box required a little less throttle on exit than the second, but then again my foot starts feeling heavy when I see a finish

I need to start making video again, it is helpful getting other peoples input. When I review my own videos, I rarely can see mistakes that I did not pickup on during the run.

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92 Miata 1.9L naturally aspirated. SSM 21

Fun event for sure and I really enjoyed getting back up to NCCAR in good weather on grippy tarmac!

The course was fun and definitely reminiscent of the old Greenville layouts that reward those that don't really overdrive, especially in the turnaround segments. Chuck, I'm glad that 'phantom cone' was deleted because I watched all your runs from the bus and the last one definitely looked the quickest, especially on the exit of the big turnaround cone heading to the slalom for the 2nd pass. Nice way to wrap up a FTP on your final run.

Great event and thanks to everyone that pitched in to make it happen.

Here's my 3rd run:
http://youtu.be/7_VrIj7OTyg

OK Ryan, here's my decision. I'm going to stay steady state and play in RT for now, sorry bro. All of those wonderful options I can install on the 3 have cost associated w/ it and I REALLY wanted to try to save some bucks this year. I cranked up to $2k in lighting speed and that was just for some basic mods. I'll definitely consider STF next year after the SCCA issues out their new stock class rulings.

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Rodney

'08 Bullitt mustang, CAM 7
Autox VP '09-'10, President '11-'12, interim President 2nd half of ‘14
proud recipient of the Bowie Grey service award '12
Now just a guy driving a mustang....

Okay, since everyone is posting runs, here's my best run in the Co-Drive Of The Decade Caterham: http://youtube.com/watch?v=hvi41V1sWv8

The car probably had 42's in it...

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2015-2017 President
2014 Track VP
2013 Autox VP

2002 Subaru WRX [dd]
2002 Honda S2000 STR #3 (retired...for now)
1992 Acura Integra ChumpCar #118 (retired)
2004 Toyota 4Runner V8

http://beastmoderacing.com

I think you were just a little late initiating the turn back to the right coming out of the Cbox into the pivot/finish. It appeared as though you were waiting for the car to "take a set" before turning back, and that's where you got late and developed your push. I would love to see what your steering was doing at the time! On those tight Cbox setups like that I have to tell myself that I must immediately "throw the car back into the turn" on exit (actually, as soon as the passenger front headlight clears the box) which gets the rear a little loose and enables you to "swish" around that final C box exit cone and be set properly for that first cone leading to the pivot.

I also think you may have been a little late on slalom entry as well, so I suspect it was a manifestation of the same problem, just with a tighter margin of error at the Cbox.

edit: for comparison, I was nearly WOT at the center Cbox cone and exited at 35 mph. Karl's fastest run has him WOT a touch later, exiting at 37mph.

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Steve Carter
1972 Datsun 240Z-- resto pics at http://picasaweb.google.com/srcartermd
2007 GPW Honda S2000-- STR 86

If you were using Comp Mode it may not have "warmed up" before your run.

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1990 Faded Reddish CSP Lite Miata
2002 Electron Blue Corvette Z06
2005 Mazda 6 Wagon
2003 Nissan Pathfinder DTV (Dog Transport Vehicle)

Weight of Rollcage = No It is slow enough that with the grippy tires I can't even spin the tires at the start - hence the photos with the paper still on tires on Run#1

I may have to do the frame stiffening though.

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1990 Faded Reddish CSP Lite Miata
2002 Electron Blue Corvette Z06
2005 Mazda 6 Wagon
2003 Nissan Pathfinder DTV (Dog Transport Vehicle)

Rob what wheels and tires were you running?? Diamonds?

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[color=#FFFFFF][/color]http://www.usedmiatapartsonline.com for all your used miata parts needs
http://www.wagnersauto.com for your salvage needs
2000 miata se Estreet,going to rally
2004 mazdaspeed miata bsp #77
shifter kart also(someone buy this $1500)

This was definitely an issue for me on the first (only 1 total pass) C-box, but also on the slalom.

When I walked the course, I paced the interval of the first C-box, and noticed it increased, but I completely glossed over the size of it. Considering its size and the excellent surface, I don't think it was necessary to brake nearly as much as I was braking, leading to a great deal of lost time on the straightaway into the slalom. This section was not driven as badly as in my 1st, 2nd, and 4th runs, where I caught myself wondering what my foot was doing on the brake already.

I didn't bother to pace off the slalom during course walk, and someone mentioned to me after I had finished my runs that it was decreasing interval. That was news to me. Lesson learned.



In the second C-box (total 2 passes), as I was running wide, I realized I had run wide, so I made a concerted effort to get the car turned in towards the exit as soon as I passed its center cone on my second pass. On my second pass, where I coned, I think I gave my left steering input too soon trying to back-side the center cone. Due to the setup changes over the winter, the car turns in much more immediately than it used to. I just haven't figured out how to drive it properly yet, and goofed up the timing there.

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2017 THSCC Autocross Chief of Timing and Scoring

03 Nissan Altima
02 Honda S2000