I want to really learn to read data. Where do I start? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Race Prep Miata race-only chat.
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 11-04-2013, 03:52 PM   #1
Tour de Franzia
Thread Starter
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default I want to really learn to read data. Where do I start?

I have a G2X and I've been using it for a few years now. After talking to a pro-type-guy I race in TT with, I realized that I should focus on data and learn more to go faster.

I see some poor braking at the 32 and 95 second marks (not progressive, elevation is constant in these locations) on the fastest lap looking at "Accel G". In general I think my braking force/trail braking looks good; coming on progressively without stomping the pedal, trailing off evenly (32-second mark increases brake pressure since we transition up-hill). I found that I could build pressure more slowly to make more total braking force and slow the car faster (comparing accelG in "distance", MPH in distance, and MPH in time).

I don't really know what to make of the Lateral G graph and I think it's too track specific to give-away much data for people who don't know the track.

Aside from that, I think it looks like a pretty good lap which tells me I'm wrong because no one is paying me to drive cars around racetracks. Is there anything that stands out on this file which is nasty? I'm open to any discussion on this because I'm totally ignorant.

Thanks.
hustler is offline   Reply With Quote
Old 11-04-2013, 03:54 PM   #2
Tour de Franzia
Thread Starter
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

Nevermind, file won't upload.
hustler is offline   Reply With Quote
Old 11-04-2013, 03:56 PM   #3
Junior Member
 
Join Date: Feb 2009
Location: The Woodlands, TX
Posts: 328
Total Cats: 12
Default

Since you've got this thread, might as well post some recent photos of PandaGirl.
Double O 86 is offline   Reply With Quote
Old 11-04-2013, 05:00 PM   #4
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,359
Total Cats: 1,323
Default

Start with a Garmin 810.

Real answer: Have someone faster drive your car and then overlay the speed traces in "Segment X" mode. Easy way to see exactly where you are sucking. Moving past that point probably requires that you spend some time attending a seminar or other training session on the software and/or spend money on $ensor$.
Savington is online now   Reply With Quote
Old 11-04-2013, 06:35 PM   #5
Elite Member
iTrader: (2)
 
Join Date: Sep 2008
Location: Central Florida
Posts: 3,284
Total Cats: 178
Default

I tend to think of the data as similar to a dyno, but more complex.

That is, it's value tends to come in the comparisons - either in your lap times, in predictive lap times, or in comparing your laps vs someone else's laps. For the latter, preferably someone else in your car or - barring that - someone else in a comparable car using the same data acquisition.


At least, that's what I've gleaned from people who actually know what they are talking about. I have been lucky enough to be around a lot of those kinds of people over the past couple of decades.
Scrappy Jack is offline   Reply With Quote
Old 11-04-2013, 06:39 PM   #6
Newb
 
Join Date: Jan 2011
Posts: 34
Total Cats: 11
Default

You rang?


EDIT: Congrats on facing the truth and building a car with better throttle response.
SJPatMarcy90RMcCartin is offline   Reply With Quote
Old 11-04-2013, 06:41 PM   #7
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,174
Total Cats: 2,575
Default

18psi is offline   Reply With Quote
Old 11-04-2013, 06:49 PM   #8
Elite Member
 
Join Date: Jul 2005
Posts: 6,454
Total Cats: 80
Default

Maybe practice using the GT5 (on PS3) datalogger to improve your in-game laptimes?
JasonC SBB is offline   Reply With Quote
Old 11-04-2013, 11:03 PM   #9
Junior Member
 
Join Date: Mar 2013
Location: Flower Mound, TX
Posts: 235
Total Cats: 26
Default

EricJ is offline   Reply With Quote
Old 11-05-2013, 10:20 AM   #10
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: NH
Posts: 9,091
Total Cats: 90
Default

Are you trying to use the data logger to make you faster or to make the car faster. You look at the data in different ways. Video is better for the, "oh look I **** up there constantly factor." Where accelerometers, shock pots, and pyrometers are better for figuring out how to make the car faster. Chris Brown's book is good in general. But if you want the car faster bits you need the chassis dynamics and mechanics knowledge to know what the squiggling line from your shock pots mean. I haven't graduated past using the data for more than seeing where I screwed up and coming up with an optimal time, oh course only getting 3-7 shots at a track to get it right plays into that.
Leafy is offline   Reply With Quote
Old 11-05-2013, 01:12 PM   #11
Elite Member
iTrader: (4)
 
Join Date: Sep 2006
Location: Charlotte, NC
Posts: 3,049
Total Cats: 4
Default

Quote:
Originally Posted by Savington View Post
Real answer: Have someone faster drive your car and then overlay the speed traces
This.

I've got a decent amount of experience driving and looking at data, but comparing your data with someone else who is faster in the same car is by far the most valuable info you can get.

On our Grand AM cars we have all the fancy sensors and inputs/outputs datalogged (yaw rate, brake pressure, inverse corner radius, steering wheel angle, etc. etc. etc.) but none of them help nearly as much as just overlaying two speed traces. Comparing my sorry, pathetic excuse for driving with a "real" pro in the same exact car, that is how I have learned to go faster. We use the data from the other sensors to try to improve the car, but for improving the amatuer drivers, it's mostly just looking at the speed traces versus the pro.

All of my experience is with Traqmate and Race Technology so I can't really give any input on specifics with the Racepak, sorry.
Efini~FC3S is offline   Reply With Quote
Old 11-05-2013, 03:53 PM   #12
Elite Member
iTrader: (5)
 
Join Date: Dec 2010
Location: Raleigh, NC
Posts: 1,970
Total Cats: 49
Default

Quote:
Originally Posted by Efini~FC3S View Post
This.

I've got a decent amount of experience driving and looking at data, but comparing your data with someone else who is faster in the same car is by far the most valuable info you can get.

On our Grand AM cars we have all the fancy sensors and inputs/outputs datalogged (yaw rate, brake pressure, inverse corner radius, steering wheel angle, etc. etc. etc.) but none of them help nearly as much as just overlaying two speed traces. Comparing my sorry, pathetic excuse for driving with a "real" pro in the same exact car, that is how I have learned to go faster. We use the data from the other sensors to try to improve the car, but for improving the amatuer drivers, it's mostly just looking at the speed traces versus the pro.

All of my experience is with Traqmate and Race Technology so I can't really give any input on specifics with the Racepak, sorry.
**** is done all the time in F1. That's usually what they are looking at in those screens while waiting between qualifying sessions.
Seefo is offline   Reply With Quote
Old 11-07-2013, 10:09 AM   #13
Tour de Franzia
Thread Starter
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

Quote:
Originally Posted by EricJ View Post
Making Sense of Squiggly Lines: Christopher Brown: 9780983259312: Amazon.com: Books

I saw a recommendation for this book, now I need decent data acquisition.
Thanks.

I'm trying to make the driver faster, not the car. The car is as perfect as it will ever be.
hustler is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 57 07-19-2017 05:11 PM
OTS Bilstein to motorsports ASN conversion stoves Suspension, Brakes, Drivetrain 5 04-21-2016 04:00 PM
Why dynos should plot Torque divided by MAP JasonC SBB ECUs and Tuning 11 10-27-2015 05:56 PM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM
Leaky Wilwoods mx592 Suspension, Brakes, Drivetrain 1 10-01-2015 01:45 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 12:32 PM.