Harry's GPS Suite Forum

I have had a problem with my sensors syncing with the video correctly.

The OBD and Gforce seems to be off from the GPS and Video.

When I look at the video I can see that my track location and GPS seem to be right on with the video the throttle, RPM are off from the engine noise and track I would guess the throttle / rpm is 1.0 sec slow and the G force meter is .2 sec slow. and my Gear always seems to be wrong.

I think this means my Video is correct and my other sensors are off
My Set Up:

2014 Camaro 1LE 3.91 Rear end 6 spd Tremic Manual
Samsung Note 3 with 4.4.2
Harrys Petrolhead v18.3.2
ScanTool 426101 OBDLink MX Bluetooth
Dual SkyPro XGPS160 GPS

"SENSOR DELAYS"
GPS = 0.7
OBD = 1.0
Accelerator = 0.5

"OVERLAY SYNC"
Video = 1.0

I posted this Video from a BAD run as its much easier to see when I am on and off the gas as well as when the Gforce meter should be reacting. I hope some one else has a similar setup and can help.

http://youtu.be/xd6zf9JUbi8

[youtube]http://youtu.be/xd6zf9JUbi8[/youtube]


Thanks,

Mike

All sensor data is coming in with an individual delay. Even video and acceleration are late compared to reality. Especially with an OBD dongle attached, you will hardly ever see GPS being off, the position on track is not that detailed given the extreme zoom. Usually it is enough to adjust the Overlay Synchronization (which is a synonym for "Video Delay"). In case video is ahead of the data, reduce this delay and vice versa. Repeat the overlay to adjust it. Once this is in sync for one lap, it should be fine for all other automatic recordings.

- Harry

P.S. There are tons of discussions of "sensor delays" here on the forum already, please check the search function too.

mcynet,

Driving tip: You're really late on the slalom cones. You should be turning in much earlier. Have you heard the term 'backside'? It means that you should have the inside rear wheel close to the cone as you drive past it, not the front wheel as you approach. The problem is that if you don't backside the first cone in the slalom, you'll be lost for the rest of them. You need to start turning when the nose of the car crosses the line between the cones. Of course, all that goes out the window if the course is dirty. Then you have to drive the clean line even if it's wrong because that's where there's grip.

A 2014 Camaro won FS at the SCCA Solo II Nationals this year, so your car should be competitive. I would definitely keep it in Street Class trim, i.e. single adjustable monotube shocks, one alternate sway bar and good 200TW tires. But based on results from a local autocross, it's pretty competitive straight out of the box.

I accidentally managed to purge the POI's before the run, so no overlay, but here's someone who actually knows what he's doing driving my car (2011 Mustang GT, FS) on a wet course at zMax dragway in Charlotte, NC. The camera view is far less exciting than being in the car. Watch all the steering input. Note the car position in the slaloms.

http://youtu.be/BiUKK7rY5LM
[youtube]http://youtu.be/BiUKK7rY5LM[/youtube]

youtube embedding doesn't seem to be working.

The forum is picky with the youtube embedding format, check viewtopic.php?f=22&t=1142 for the details.

For your video it should be
and will look like

[youtube]http://www.youtube.com/watch?v=BiUKK7rY5LM[/youtube]