considering buying the Blackline track logger/ data. Anyone else interested, I have emailed them about a small volume purchase. check out their web page. Simple install.
It does require a pocket pc, laptop, or certain phones for data storage.

http://www.blacklinegps.com/fuel.html

 

a neat feature,
since there is no connection to the car, it requires only: 1, power, can use batteries, 2, antenna, a magnetic rooftop is supplied, 3, bluethooth or serial connection to pocket pc ...

The ability to move the GPS from car to car means you can study the driving style of another driver, see their braking points, their line, their acceleration, on a map of the track.

It should be easy to see where another driver has a better time through a section of track, and try to figure out what he is doing right. I know riding along as a passenger it can be misleading thinking where another driver is "right" or wrong. If you can see that he has made that section of track quicker you know there is room to improve.

It might also tell you you are on par, if throughout the course you are equally behind, that might suggest different power levels, suspension or comfort levels.

 

The problem with GPS systems, as I understand it, is that they are only accurate within a few feet. On a 30-foot wide racetrack, a few feet matters. You are better off with an accelerometer system.

 

I see your point Richard, a foot and a half does mean something, however (and this would only restate your point) the relative position on the track, viewed on a laptop, would be hard to discern even at a greater scale.

That said, knowing how precise your braking points are or how they relate to another driver should be valuable since the behavior can be placed at a point on the track. Same with acceleration. Again within a window of some feet.

I still think it would be worthwhile at least as a learning tool.

 

I am with Richard about using GPS for g-force data. Besides the resolution issue there is also a slight delay with GPS g-force data. I have a G2x unit and the only time I use the satellites is for mapping the track at the end of the session. I use the on-board accelerometers to gauge where my braking/acceleration pts are. Very useful tool especially you compare yourself with a better driver.

I am attaching a sample lap from one my recent track events. Red is lateral g-force from GPS and green is from the on-board lateral g-force.

 

ok, I can see the slight difference, maybe I should ask what equipment do you use?

The ability to put your car on a track seems to be important in my mind, if the locator points are retarted slightly, as long as what you are measuring against is measured the same way it should still be valuable. In other words, you have a known good run, what the map shows is correct and worth learning from is it not?

But anyway, I'm not married to this thing, what else is out there that gives the same information?

 

alpina.nut

are you reading your display while driving?

 

I am using G2X from RacePak. Check g2xtreme.com. I have more reviews at my own track blog website .

Actually, what I am showing you is just a part of the software. That is a corresponding map below the graph. So as you move along the data, you will see where you are on the track. A delayed signal can show a different braking zone on the track map.




Have to be careful in answering this question, cos if you read my blog, I do have a display that I read and record sensors (different from G2x). The G2x has a dash that displays, lap time, lap different, gear indicator, shift lights, RPM etc. But honestly, I only glance at the lap time at the S/F line. I never used the rest of the features much.

That is post-session data analysis.

 

My Race Technology AX22 unit uses GPS and accelerometers. Very nice buy.

 

last effort, any interest? this goes for about half what the other systems cost. If there are five people it could go for just over $400