Data acquisition
Data acquisition
Who here uses it and what do you use?
And how does it benefit you?
I've used SoloStorm driving with Aaron and Kristo. It seems simple enough, but I don't really think it helped me figure anything out.
Also, is there any of the choices out there that can give me throttle percentage on a pre-OBD car?
And how does it benefit you?
I've used SoloStorm driving with Aaron and Kristo. It seems simple enough, but I don't really think it helped me figure anything out.
Also, is there any of the choices out there that can give me throttle percentage on a pre-OBD car?
'16 FRS - PSTX 97
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Re: Data acquisition
Harald Schlangmann of Harry's Laptimer has announced that there is work being done on a device to collect data like throttle opening from pre-OBD cars and transmit it in OBDII format for compatibility. See here: http://www.gps-laptimer-forum.de/viewto ... =11&t=1714
I use Harry's Laptimer with a BT1 OBDII dongle and a Dual XGPS160 10Hz Bluetooth GPS. I think a good way to look for places to go faster is the plot of total acceleration. Dips in the plot are where you might go faster, things like braking too soon and coasting before getting on the gas again.
Of course if you have a co-driver, it's better, as you can tell who's going faster where and probably why.
I think it's helped me, and even if it hasn't it's been fun to play with.
I use Harry's Laptimer with a BT1 OBDII dongle and a Dual XGPS160 10Hz Bluetooth GPS. I think a good way to look for places to go faster is the plot of total acceleration. Dips in the plot are where you might go faster, things like braking too soon and coasting before getting on the gas again.
Of course if you have a co-driver, it's better, as you can tell who's going faster where and probably why.
I think it's helped me, and even if it hasn't it's been fun to play with.
DeWitt Payne
2011 Mustang GT CAM-C
"Tires are meant to die young." Heyward Wagner
2011 Mustang GT CAM-C
"Tires are meant to die young." Heyward Wagner
Re: Data acquisition
I might have to search your old posts, Dewitt. I remember you posting some things that were pretty interesting, but I was sort of anti-data acq at that point.
'16 FRS - PSTX 97
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Re: Data acquisition
I have used Race Keepers and its great. It gives me a lot more information than I really need though. The video inputs are great and with having four of them how many more angles do you really need?
RC
RC
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Re: Data acquisition
One good thing is that unless you delete it, the data are always there. For example, here's the GPS plot from runs at Event #4 and #12 showing that the courses were indeed nearly identical. The main difference being the location of the starting line.
DeWitt Payne
2011 Mustang GT CAM-C
"Tires are meant to die young." Heyward Wagner
2011 Mustang GT CAM-C
"Tires are meant to die young." Heyward Wagner
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Re: Data acquisition
And every corner in blue is much more pinched off... the start is the least important part of that course.. unless you have no power ..
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Re: Data acquisition
no,its just where it overlaps.
ETR Pro Class Champion-2002-03-10-11-12-13-14-15
BMW/CCA D-Mod National Road Racing Champion-2011
Pro-Solo Prepared National Champ-2004
Pro-Solo Prepared National Champ-2005
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BMW/CCA D-Mod National Road Racing Champion-2011
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Pro-Solo Prepared National Champ-2005
2016 Dodge Challenger SRT 6.4L CAM-C
Re: Data acquisition
Same shape of the course, but moving a few cones a few inches often totally changes how the course drives. This course totally drove different.
'16 FRS - PSTX 97
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Re: Data acquisition
steverife wrote:Same shape of the course, but moving a few cones a few inches often totally changes how the course drives. This course totally drove different.
no data acquisition needed......... it went from a momentum course to a power course with just those small changes.. if the power cars had not fouled out.. the sissy cars would not have stood a chance in Pro Class.
and mainly why course design is so touchy.. a few inches here and there, change the whole picture.. Also, why I have never used much serious data in autocrossing.. Its too hard to duplicate a run. (or..I cant) Road racing its much easier.. plus , you get several attempts to "get it right"
ETR Pro Class Champion-2002-03-10-11-12-13-14-15
BMW/CCA D-Mod National Road Racing Champion-2011
Pro-Solo Prepared National Champ-2004
Pro-Solo Prepared National Champ-2005
2016 Dodge Challenger SRT 6.4L CAM-C
BMW/CCA D-Mod National Road Racing Champion-2011
Pro-Solo Prepared National Champ-2004
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2016 Dodge Challenger SRT 6.4L CAM-C
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Re: Data acquisition
Even though it felt different to drive, the times were similar. FTD for #4 was Robert Carpenter @ 61.353 and for #12 it was David Disney at 63.561
Dennis Grant though data logging was useful. Of course his system was much more comprehensive including suspension travel at each corner.
Dennis Grant though data logging was useful. Of course his system was much more comprehensive including suspension travel at each corner.
DeWitt Payne
2011 Mustang GT CAM-C
"Tires are meant to die young." Heyward Wagner
2011 Mustang GT CAM-C
"Tires are meant to die young." Heyward Wagner
Re: Data acquisition
dewitt, no disrespect, but 2.2 seconds on an autocross course is not even in the same ballpark.
Chris Harp
2009 Mazda RX-8 | 2018 Toyota Tundra | 2011 BMW M3
2009 Mazda RX-8 | 2018 Toyota Tundra | 2011 BMW M3
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Re: Data acquisition
From a driver development perspective, I think Data would be useful for autocross if you could have throttle/brake traces synched to video (so you could see steering/gear inputs). That would let you really take a hard look at your habits, and if you were someone with less experience letting a hot-shoe drive your car, you would be able to see what they were doing (and when) that made them faster than you rather than just confirming that they are faster than you.
IMO without the throttle/brake information in conjunction with a speed/time function, it's somewhat pointless for autocross.
On a road course, I've actually learned a thing or two just by looking at a speed/time graph because I can look at video and split intervals to see where I might have lost or gained time on myself.
All of the suspension travel/lateral G/etc. measurements might help with car tuning for that last 1-2% of performance.....but first you'd have to be good enough, consistently enough to actually be able to take advantage of a 1-2% better car. (I know I'm not)
IMO without the throttle/brake information in conjunction with a speed/time function, it's somewhat pointless for autocross.
On a road course, I've actually learned a thing or two just by looking at a speed/time graph because I can look at video and split intervals to see where I might have lost or gained time on myself.
All of the suspension travel/lateral G/etc. measurements might help with car tuning for that last 1-2% of performance.....but first you'd have to be good enough, consistently enough to actually be able to take advantage of a 1-2% better car. (I know I'm not)
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Re: Data acquisition
That was something of an apples and oranges comparison. Looking at the same car and same driver, we have Jim Simmons with a 65.908 in #4 and a 67.232 in #12; John Brown with a 66.328 in #4 and 65.066 in #12 and Paul Heathman 67.841 and 67.042. That's +1.3, -1.3, -0.8.thrdeye wrote:dewitt, no disrespect, but 2.2 seconds on an autocross course is not even in the same ballpark.
DeWitt Payne
2011 Mustang GT CAM-C
"Tires are meant to die young." Heyward Wagner
2011 Mustang GT CAM-C
"Tires are meant to die young." Heyward Wagner
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Re: Data acquisition
Wheelman_13,
I get throttle from the OBDII port on the car via Bluetooth. Brake would be nice, but that would require a professional data logging system at a much higher price point. I'm looking for seconds, not tenths or hundredths. At #12, I estimate I was about 4 seconds slower than the car capability.
I get throttle from the OBDII port on the car via Bluetooth. Brake would be nice, but that would require a professional data logging system at a much higher price point. I'm looking for seconds, not tenths or hundredths. At #12, I estimate I was about 4 seconds slower than the car capability.
DeWitt Payne
2011 Mustang GT CAM-C
"Tires are meant to die young." Heyward Wagner
2011 Mustang GT CAM-C
"Tires are meant to die young." Heyward Wagner