THSCC Forums

Anyone ever use one of these?

http://www.aim-sportline.com/pages/solo/index.htm

For $399 I'm having a hard time finding a reason not to buy it (other than not having $399). The only downside I see is no inputs, but I think that I can live without those.

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"Every ship is a minesweeper, once."

We got it from Apex, and they gave us a THSCC discount. This thing is pretty amazing; we had a faster driver in the car and it's very interesting to go through his fastest lap and my fastest lap and see where I gained and lost. I can't wait to get back to VIR and use some of this information.

If you want to see how the analysis looks, then you can download the software here:

http://www.aim-sportline.com/eng/download/software.htm

The lap data from VIR this past weekend is here; it should be the first file in the list:

http://s115271005.onlinehome.us/LeMons/

I did a comparison of the two fastest laps, run-30/lap-5 (Kraig), and run-22/lap-7 (Me) if you'd like to check it out:

https://docs.google.com/file/d/0B3lEGzJ ... sp=sharing

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"Every ship is a minesweeper, once."

Make sure you get both of the files that start with "2013". One is the accelerometer data and one is the GPS data. They are both necessary for the SW to show you everything.

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"Every ship is a minesweeper, once."

I never though I would actually be entertained by a Power Point presentation.

Dang, that's cool.

I finally figured out how to make traction circles and replay laps. There are a whole lot of settings and configurable stuff in the analysis software. Here are some traction circles from the two laps that I've been going over:

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"Every ship is a minesweeper, once."

Is this Sex-Ed where we are shown the Female reproductive system?

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1994 STS Miata

There are plenty of sites on the Internet where you can see the female reproductive system, or so I've heard.

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"Every ship is a minesweeper, once."

you catching me on the straights cause you stay in the gas to higher RPM?

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1994 STS Miata

In most places where I'm faster than you, yes, and that was good information because my brother has been insisting for years that it just sounds faster but it isn't really faster and I have been insisting that it is faster. Of course it doesn't help me when I give it right back with interest when I run out of RPM's or extend my braking zone, so I still need to be in a higher gear in some places. I still think that I have a better line through 11, and there are a couple of places where I think that four years of driving the car have given me a better feel for where the limit is, not to mention that it's my car, so I'm more willing to take chances with it than if I were driving someone else's car.

The three big areas that jump out at me right away when looking at the data are braking, track out, and gear selection. If I fixed those three, then I think that I'd be much closer to your times. Ricky and I were looking at some laps today and he brakes later than I do, but not as late as you. He's faster than me going in to T1, but we both give it all back by T3, mostly in the T1 braking zone. He brakes too much and I brake too soon. I'm basically braking 60 feet earlier than you and our speeds are within 2MPH of each other. In many places we go through the turns at the same speed, but I have a worse exit because I didn't track on the prior turn and I'm behind you because I brake too early.

I haven't gotten to really looking at lateral G's yet, but looking at the lines in the traction circle, I'm guessing that your inputs are also smoother than mine. Part of that is going to be gear selection; I'm lifting and changing gears and generally unsettling the car while you are focusing on steering input with your foot on the floor. Another part is track out, I'm pinching it where I should be opening it and in the process setting myself up to early apex and pinch it again. That was apparent in several turns. Another part is that your inputs are probably just smoother in general.

I figure next month at VIR I'm going to focus on braking, tracking out, and figuring out where I want to change gears. I should be a lot better at using the data analysis SW by then, so we should be able to get meaningful feedback from it between sessions. I'll set up a spare laptop in the bus with a long USB cable so we can plug in the car between sessions and grab the data. That way we can just tag it with our names when we pull it.

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"Every ship is a minesweeper, once."

I finally got around to downloading and analyzing the data from VIR-Full and CMP, and my analyses are here:

https://docs.google.com/file/d/0B3lEGzJ ... sp=sharing
https://docs.google.com/file/d/0B3lEGzJ ... sp=sharing

The raw log data is here if anyone wants to do their own analysis:

https://docs.google.com/file/d/0B3lEGzJ ... sp=sharing
https://docs.google.com/file/d/0B3lEGzJ ... sp=sharing

The next event is an autocross in July, but I'll probably take Lumpy to that. The Duff car should be idle until the August Chump event at VIR.

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"Every ship is a minesweeper, once."

T12? There isn't a T12 on VIR-F. If you're talking about the lead up to T14 (top of the rollercoaster), that's not a lift from me, that's me at rev-limit. I wasn't attempting to shift to 5th with that screwed up transmission. I follow a completely different line through T11, so I'm going to be much farther inside that either of you. T1 I brake too early, lift a bit to actually get to the corner, and then finish braking. I'll get a feel for it eventually. I've just not had as much time at VIR.

At CMP, my fastest lap was during the TT... 2:05.015. The graph of T3, isn't so much a lift as it is no power in 4th. I was going to 4 out of T2 and staying there past T7. (If I was in 3rd, yeah, there's be a big lift there.) Yes, I was shifting to 5th on the way to the kink; the car feels a lot more stable through T10 in 5th, which means I won't lift. (and yes, I wasn't wearing my skirt, i.e. looking at the speedo. If I'm looking at my speed, I'll feather at 90mph. We've both gone flying off there.) Kraig was in full autox mode... aiming for the cones :-) You have Brad and Bryan to thank for my speed through T11... open the wheel and foot on the floor, "they paved it, use it!" I think Kraig is braking so late at T14 because he's never had the car on the World's Worst Gators(tm). It also looks like he went through in 4th. We both have a little lift after the turn, around where I go to 4th. Apparently we're all getting it done as we appear to have the same speed getting out of T14.

I was spending a lot of time in 4th and shifting up to 5th. It's a bit slower at times, but it's easier on the car, and this wasn't a race! In a race, you bet I'll wind'er up to keep what little power there is.

The time difference is because I was using the GPS timing vice the transponder timing. I'll have to see when the results are posted to MyLaps how much of a difference there is between the two.

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"Every ship is a minesweeper, once."

Somewhat on topic, but I used my phone at VIR-N to get some rudimentary lap times. Emphasis on rudimentary (the GPS interpolation had me off-roading for 80% of the lap). I put an external GPS on for CMP, and it definitely cleaned up the GPS interpolation on the phone. I'm sure it's not 100% matching with the transponder; however, it is probably within a tenth or two.

If you look at logger dashes like the Racepak IQ3, they are just using a 10Hz GPS. Same stuff, different package.

e: holy cow this thing is awesome

Comparison of 5Hz vs internal 1Hz:

1Hz (ignore the 8 min laptime, I had an off at T11):
http://www.mytrackmaster.com/#SessionEd ... lvbhjh1AMM

5Hz:
http://www.mytrackmaster.com/#SessionEd ... lvbhiv4gcM

Why is the acceleration all over the place? Is that a mounting problem? I'm assuming that your Miata was not pulling 1.6G of acceleration.

Also, how do you like the Nexus 4? I'm still loving my old Galaxy Nexus, but was thinking about buying the new one. Is there a good car dock for it like they had for the Galaxy?

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"Every ship is a minesweeper, once."