Another track video and tire status update
02-16-2014, 10:13 PM
#31
Drifting
Thread Starter
Yeah, a calibrated internal accelerometer on the solo will be your most accurate read. I don't know if there is a linear discrepancy between actual and calculated Gs. However, like the accelerometer in the GT3 and on the Solo, you cannot go off of peak Gs. There will be spikes in lateral Gs depending on whether you are hitting a bank or a dip at the apex of a corner. The apex of turn 6 at Laguna will read crazy high Gs because of the dip you fall into. The peak spikes are not valuable data points on the car's capabilities. You need to read sustained peak Gs as you're going through a flat, sweeping turn to get a real idea of what kind of Gs the car is capable of. You can read off of the graphs on race studio, but I find it difficult to read off the graphs because of all of the noise/variation. The easiest way is to do a video overlay and watch the G meter as you go through the turn. Once you know what the peaks are, you can see if you left any time on the table through the turns if you don't hit those peaks.
When I get my GT3 this summer, I'll post videos like this:
When I get my GT3 this summer, I'll post videos like this:
02-16-2014, 10:23 PM
#32
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Thanks, that would be awesome because I never thought I could do that with the GoPro. Feel free to give him my contact info. Also, since I'm a Mac user, it's a pain to get the AIM data and its becoming an expensive lap timer. Speaking of G-forces, the car (like the other 991 variants is a bit too generous in it's G reads. In the other two cars, I would get 1.48 G as max but the AIM would read 1.3 (trail breaking). I am yet to review my actual Gs and compare them to those from yesterday:
Last edited by MaxLTV; 05-25-2014 at 08:40 PM.
02-16-2014, 10:29 PM
#33
Nordschleife Master
02-16-2014, 10:32 PM
#34
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Cool set up! I've just realized I was using your 2:04 Thunderhill lap video to prepare for my last track day. 
Which track days would you recommend? I only tried Hooked on Driving so far - they are ok but not much track time in a day.
Which track days would you recommend? I only tried Hooked on Driving so far - they are ok but not much track time in a day.
02-16-2014, 10:44 PM
#35
Nordschleife Master
No way! Lol, thanks! I run with HOD, NCRC, and TMR. I think TMR gets you the most track time, whereas NCRC is the cheapest but the most standing around time between sessions. I'll be out with hod on 3/21 at MRLS and 5/9 at Thill. Maybe I'll see you there? Bensf is the guy that runs 2:02 on nt01s over the top at thill and 1:59 with hankooks z215s on a boxster spyder. I can't wait to see him in a 991gt3 to see what he can do with it.
02-16-2014, 10:58 PM
#36
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So it looks like you guys are using something like the AIM Sports which connects to the CAN to get the engine data.. -- Awesome.. http://www.aimsports.com/products/mxl-chooser.html
Hope they have a 991 GT3 module soon.
-For a bike I have a bmw race factory product which connects to the ECU and gives ~ 30 data points from GPS as well as ECU. (TSC/Wheel Spin, Brrake %, Throttle, ABS, Lean Angle via GPS.. i know.. , Scatter Graph w/ g forces etc.), lap overlays w/ google earth etc. Here is a pict from a track session.
-- Is there anything for the GT3 like this that don't cost over ~3-5k or what do you recommend. -- e.g. AIM?
--I'm working with DashWare, but RaceRender looks pretty good too.
-Lacking any natural ability, I've found this to be the most effective tool for increasing lap times.
Thx..
02-16-2014, 11:13 PM
#37
Nordschleife Master
Great Video. I love Data Ack, but new to cars.
So it looks like you guys are using something like the AIM Sports which connects to the CAN to get the engine data.. -- Awesome.. http://www.aimsports.com/products/mxl-chooser.html
Hope they have a 991 GT3 module soon.
So it looks like you guys are using something like the AIM Sports which connects to the CAN to get the engine data.. -- Awesome.. http://www.aimsports.com/products/mxl-chooser.html
Hope they have a 991 GT3 module soon.
http://www.aim-sportline.com/downloa...11_100_eng.pdf
-For a bike I have a bmw race factory product which connects to the ECU and gives ~ 30 data points from GPS as well as ECU. (TSC/Wheel Spin, Brrake %, Throttle, ABS, Lean Angle via GPS.. i know.. , Scatter Graph w/ g forces etc.), lap overlays w/ google earth etc. Here is a pict from a track session.
-- Is there anything for the GT3 like this that don't cost over ~3-5k or what do you recommend. -- e.g. AIM?
-- Is there anything for the GT3 like this that don't cost over ~3-5k or what do you recommend. -- e.g. AIM?
--I'm working with DashWare, but RaceRender looks pretty good too.
-Lacking any natural ability, I've found this to be the most effective tool for increasing lap times.
Thx..
Thx..
02-17-2014, 12:05 AM
#39
Rennlist Member
orthojoe, great driving. Was that the standard exhaust sound on your Spyder?
Get a HANS and tighten up your harness.
SamFromTX, you're too fast for white run group -- should move up to black.
Get a HANS and tighten up your harness.
SamFromTX, you're too fast for white run group -- should move up to black.
02-17-2014, 12:09 AM
#40
Nordschleife Master
SamFromTX, you're too fast for white run group -- should move up to black.
02-17-2014, 12:12 AM
#41
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Ok. so racestudio2 is equivalent to the 2D analysis sw I got re-banded by BMW. Excellent. This is where you make the magic happen. -- Yes steep learning curve, but once you get it, --Awesome.
(I know the drill for me anyways.. e.g. superimpose fast & slow laps and spend couple hour working backwards thru the turns, looking at all the data to usually find it it all related to something like a bad turn in point. In Slow, Out Fast LOL)
e.g. http://2d-datarecording.com/produkte/software
02-17-2014, 12:25 AM
#43
Rennlist Member
I would have got the hans before making any other mod/upgrade. If you plan to keep/track the Spyder, get the hans regardless of which seats are in the GT3. Looking forward to your comparison between the two.
02-17-2014, 12:38 AM
#44
Nordschleife Master
Can I just go on record saying that it warms my heart to finally see some real track discussion in the 991 GT3 sub forum?
