GPS lap timer recommendations?
- Thread starter darkie
- Start date
Mr Sunshine
Narf
LOL!!
I'd get a GPX...there is no reason to get only a GPS timer.
I'd get a GPX...there is no reason to get only a GPS timer.
ksamer
Active member
Check out the new AiM Solo
It has:
It's $399 and I'm the local AiM reseller, so let me know what you think.
Kamal
It has:
- GPS lap times
- Predictive lap time
- Accelerometers to measure braking and throttle roll-on
- The same analysis software as all the advanced AiM systems (track maps, sector times, etc.)
- Internal GPS antenna and battery for easy installation
It's $399 and I'm the local AiM reseller, so let me know what you think.
Kamal
ksamer
Active member
The GPX Pro from XT Racing is a good choice, too
It has the GPS lap timing, some good software, plus it can be expanded to include logging:
http://www.xtracing.com/en/gpxpro/index.php
I've attached a sample of the software. The AiM Solo will produce the same type of output, but it can't be upgraded with sensors.
This is what CJ Weaver used when he was Top Novice in 2010.
Regards,
Kamal
It has the GPS lap timing, some good software, plus it can be expanded to include logging:
- RPM
- Throttle position
- Brake pressures
- Fork and shock position
http://www.xtracing.com/en/gpxpro/index.php
I've attached a sample of the software. The AiM Solo will produce the same type of output, but it can't be upgraded with sensors.
This is what CJ Weaver used when he was Top Novice in 2010.
Regards,
Kamal
darkie
Dylan Code
This is helpful. Which would you say is the quickest to download and review and the easiest to interpret? Or are they very similar?
I used a Starlane GPS and it was a lot of fiddling and certain things were buggy about the software, such as it would automatically switch to Kph from Mph and though the setting was changed, it would not change the display data. In other words, it did not "just work".
Selling both, you can't play favorites but, as stated above, I want to know: which one is the quickest and simplest for downloading and reading the data on a computer?
ksamer
Active member
AiM Solo vs. XT GPx
You can get instant gratification from either unit by toggling through lap times and other data right on the screen. The GPx offers more data to toggle through as it has a bigger screen, more features and more buttons.
Either of these units can be useful without ever downloading the data and using the software (at least until the memory fills up...)
Both download data to your PC via a USB cable, so there is not much difference there.
Once you download the data the big benefits and differences are in the software.
The GPx software is written specifically for the GPx, so they mesh nicely. It has fewer features and after adding sensors the only upgrade path is to another brand of system. The data itself will not carry over, though the sensors can.
The AiM Solo uses the same software as all AiM systems. The unit produces only the minimum amount of data that the software can use (track positition, timing, G forces), but the software can do alot with that data, if you make the effort to master those features. The upgrade path is to a more sophisticated AiM system with sensors, and all your data carries over.
Either of these units and software will help you:
Regards,
Kamal
You can get instant gratification from either unit by toggling through lap times and other data right on the screen. The GPx offers more data to toggle through as it has a bigger screen, more features and more buttons.
Either of these units can be useful without ever downloading the data and using the software (at least until the memory fills up...)
Both download data to your PC via a USB cable, so there is not much difference there.
Once you download the data the big benefits and differences are in the software.
The GPx software is written specifically for the GPx, so they mesh nicely. It has fewer features and after adding sensors the only upgrade path is to another brand of system. The data itself will not carry over, though the sensors can.
The AiM Solo uses the same software as all AiM systems. The unit produces only the minimum amount of data that the software can use (track positition, timing, G forces), but the software can do alot with that data, if you make the effort to master those features. The upgrade path is to a more sophisticated AiM system with sensors, and all your data carries over.
Either of these units and software will help you:
- Identify where you can gain the most time for the least effor and risk
- Plan what to work on in the next session to get the most our of your track time and resources
- Measure and maintain your improvement from session-to-session, weekend-to-weekend, season-to-season
Regards,
Kamal
Ducky_Fresh
Treasure Hunter
Or, search eBay and find an AIM MYCHRON. 
rob linders
Well-known member
Kamal,
What HZ do the units sample at?
What HZ do the units sample at?
Mr Sunshine
Narf
Here is one thing I like with something that gets data (in this case a GPX).
http://www.youtube.com/watch?v=ssQ4CKliLd8
You can take the data with a video and using one of the various overlay programs you can create good videos. They don't just look cool...they are a good learning tool.
http://www.youtube.com/watch?v=ssQ4CKliLd8
You can take the data with a video and using one of the various overlay programs you can create good videos. They don't just look cool...they are a good learning tool.
Mr Sunshine
Narf
Attached is a screen shot of one of the things I'm doing with my GPX.
You'll see in the middle graph dotted vertical lines. Those are gear changes attached to my gear position sensor.
The top graph is throttle position.
The bottom graph is data from wide band O2 sensor that comes in as a linear voltage.
Do you see what I see? Yeah, an on track dyno for tuning. Its pretty different than what the dyno said and if my motor didn't pop that weeknd I would have likely spent some more tie adjusting the O2 ratios to smooth it out and make it ride better.
You'll see in the middle graph dotted vertical lines. Those are gear changes attached to my gear position sensor.
The top graph is throttle position.
The bottom graph is data from wide band O2 sensor that comes in as a linear voltage.
Do you see what I see? Yeah, an on track dyno for tuning. Its pretty different than what the dyno said and if my motor didn't pop that weeknd I would have likely spent some more tie adjusting the O2 ratios to smooth it out and make it ride better.
Attachments
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gpx example.jpg
ksamer
Active member
GPS Sample Rate, GPx as on-track dyno
rob linders - Each of the units will "sample" GPS position at 10Hz (ten times per second). This is the most common GPS chip available for this type of application.
HOWEVER, they have accelerometers (also chips) sampling at 100Hz (100 times per second) and recording changes in speed and direction. The software uses the accelerometer data to interpolate (fill in and smooth out) the ridden line between the GPS positions. This effectively yields a 100 Hz rate of recording your position on the track.
So at 60 mph (88 feet/second) they are recording your position every 0.88 feet (~11 inches).
Mr. Sunshine - This is an excellent example of using data acquisition for tuning. If you export the data from the GPx sofware into Excel you can create the actual fuel map from the session. Compare it with the fuel map you programed into your EFI controller and you have a very good idea of where and how to adjust it for maximum torque and horsepower where you need it most.
Regards,
Kamal
rob linders - Each of the units will "sample" GPS position at 10Hz (ten times per second). This is the most common GPS chip available for this type of application.
HOWEVER, they have accelerometers (also chips) sampling at 100Hz (100 times per second) and recording changes in speed and direction. The software uses the accelerometer data to interpolate (fill in and smooth out) the ridden line between the GPS positions. This effectively yields a 100 Hz rate of recording your position on the track.
So at 60 mph (88 feet/second) they are recording your position every 0.88 feet (~11 inches).
Mr. Sunshine - This is an excellent example of using data acquisition for tuning. If you export the data from the GPx sofware into Excel you can create the actual fuel map from the session. Compare it with the fuel map you programed into your EFI controller and you have a very good idea of where and how to adjust it for maximum torque and horsepower where you need it most.
Regards,
Kamal
Mr Sunshine
Narf
Yeah I was actually working on getting Excel to make me the right 3D map based on the fuel information. Just got busy doing something else.
Quinton
...
Dylan - You're welcome to borrow my GPX and velcro it to your bike and make a couple maps at any Keigwins track day I'm at (as many of them as I can make) to try it.
How you're going to consumer the data probably should shape your equipment decision. So far I have no idea what I'm doing but I'm simply trying to capture data, since I figure I can figure out how to make it meaningful in a parallel but separate step.
Here is a very basic implementation of GPX output file if you want a small data set to ponder: http://goo.gl/P7Vsg I don't have any of the eleventy inputs you can wire into that thing connected yet if you want a fire hose of data.
And here's one way I'm trying to use this data to compare lines and fast vs. slow sections of track, across laps, and sometimes across riders when I can acquire external data sets so far, but I'm barely scratching the surface and some ninja like Kamal can probably help you way beyond this for a fair fee: http://goo.gl/pZ7ST
Wouldn't it be cool if there was a universal standard for data capture and format so all tools could share this data to our collective benefit?
How you're going to consumer the data probably should shape your equipment decision. So far I have no idea what I'm doing but I'm simply trying to capture data, since I figure I can figure out how to make it meaningful in a parallel but separate step.
Here is a very basic implementation of GPX output file if you want a small data set to ponder: http://goo.gl/P7Vsg I don't have any of the eleventy inputs you can wire into that thing connected yet if you want a fire hose of data.
And here's one way I'm trying to use this data to compare lines and fast vs. slow sections of track, across laps, and sometimes across riders when I can acquire external data sets so far, but I'm barely scratching the surface and some ninja like Kamal can probably help you way beyond this for a fair fee: http://goo.gl/pZ7ST
Wouldn't it be cool if there was a universal standard for data capture and format so all tools could share this data to our collective benefit?
phocup
Well-known member
This might be a boob question but I'm not really sure how these units work .. does it need to be wired to the bike ?
I'm wondering if a GPX will work with my bike and my car for those days when I do AX or DE with the car.
Can I just unplug it from the bike and put it in the car to get atleast lap time if not all the other data ?
I'm wondering if a GPX will work with my bike and my car for those days when I do AX or DE with the car.
Can I just unplug it from the bike and put it in the car to get atleast lap time if not all the other data ?
Mr Sunshine
Narf
It has a battery and the basic sensors are built into it. So yes you can.
Ducky_Fresh
Treasure Hunter
What iPhone4 apps are out there? I know Siggy was using something and putting it in his speed hump?