Dynomaster Questions

RE: Setting up for Dyno Run

2010-07-28T10:52:11Z

I think I messed up exporting the data, can't find it on the phone nor the original run I'll do another run in a couple of days and post that one up.

Out of interest, when I checked the last run (before I messed it) it had the top speed somewhat lower then I actually attained. I am assuming that the GPS on the phone hadn't updated enough for the software to really get a handle on the real speed. I realised as well that where I am doing the run is partly covered with trees so I would guess that is affecting the signal and thus accuracy.

RE: BT GPS issues

2010-07-26T17:57:52Z

Thanks Jeff.

RE: Setting up for Dyno Run

2010-07-25T15:32:50Z

Hi Kelvin,

Can you send your data in Google Earth format? That would be the easiest way to analyze your data to see what was done. You can attach it here.

Jeff

Setting up for Dyno Run

2010-07-25T11:39:24Z

Hi all!

I have been trying to setup for a dyno run on my motorbike. I have set the weight (any chance of having the option of metric weights as well as lbs?), entered a drag coff (although not sure how I work that out for the bike, I assume that higher is worse?) etc. But I only got a return of 17BHP!

Now having read a couple of other posts I believe that I have to set the speed to say 20-30mph, get into 3rd and set the stop speed to slighly below the redline speed? With it like that should I start moving and get into 3rd as soon as I can then just floor it?

Sorry to be a pest with the questions

RE: BT GPS issues

2010-07-23T23:55:15Z

Just released Dynomaster v2.4. Fixed that bug that prevented you from using your bluetooth if the internal GPS was disabled.

Jeff

RE: BT GPS issues

2010-07-13T19:04:22Z

Sounds great. Thanks for the great support as always.

RE: BT GPS issues

2010-07-13T18:40:26Z

Yep, I added it to the list. The file format is actually MSExcel XLS and not CSV. CSV is pretty simple and doesn't allow you have the multiple tabs as well as other extra features like formatting.

Jeff

RE: BT GPS issues

2010-07-13T18:31:58Z

There is is! Thanks!

I believe it's possible to define decimal places for columns when writing CSV files ... I've never done it, but I work with other logging apps that do it (PC, not Android). Any chance we could see this in an update?

RE: BT GPS issues

2010-07-13T18:27:57Z

Ahhh...Ok. I believe this is an Excel display thing. If you right-click on the column and 'Format Cells' on it you can adjust the decimal places to see the full precision.

Jeff

RE: BT GPS issues

2010-07-13T18:20:09Z

Was looking at raw Excel data. Run Data tab.

RE: BT GPS issues

2010-07-13T18:02:54Z

Just need to make sure I have everything covered. You might be surprised by some of the emails I get

The Google Earth data looks very good. Lat/Long data updates correctly and at high precision. Which log are you looking at that shows no updating?

Jeff

RE: BT GPS issues

2010-07-13T17:48:26Z

Wait ... I have to be moving? You never said that!

Yeah, this was just a slow acceleration test to see how the 5hz data would turn out. Got up to 55-ish I think. I'll send the data over. I only see 2 decimals for Lat/Long and only one value changes in the log I'm looking at.

RE: BT GPS issues

2010-07-13T17:01:10Z

There isn't any rounding going on for the logging. The display will truncate to 4 decimal places. The data logging is exactly the same as Trackmaster. Can you send your data in Google Earth format? This may be a stupid question, but you are moving right?

Jeff

RE: BT GPS issues

2010-07-13T16:30:58Z

Just looked over the data. The time stamp is definitely 5hz, but the Lat/Long coordinates don't change really. Is that just due to rounding to the 0.00 decimal? Everything else looks to be functioning correctly.

RE: BT GPS issues

2010-07-13T16:24:20Z

I'll try again today then. Like I said, the display seems to respond at a 1hz rate even with BT selected. Can you verify that locally, or would you like for me to send logs? I haven't checked the actual data to see if it was really 5hz response.

RE: BT GPS issues

2010-07-13T15:09:04Z

You found a bug. Dynomaster is requiring you to have your internal GPS enabled even though you are using bluetooth. The workaround is to enable your internal GPS. If you have Dynomaster set to use bluetooth, it won't turn it on, but it just needs to be enabled. I'll have it fixed in the next version due for sometime next week.

Jeff

BT GPS issues

2010-07-13T12:57:21Z

Jeff, I finally tried out Dynomaster yesterday using my BT GPS and ran in to some issues.

Basically, I connected to the BT GPS service, connected to the device and the BT GPS app functioned correctly. I switched to Dynomaster and was able to properly select the BT device in the settings menu. However, it kept asking me to turn on my internal GPS, even with "Bluetooth" selected as the device in the settings. I tried swapping back and forth from "internal" to "bluetooth" and it made no difference.

If I turn on the internal GPS, the display seems to reflect the 1hz response time of the internal unit. If the internal GPS is off, I simply get the "Searching for GPS" animation and cannot use the app.

When this happened, I switched back to the BT GPS app and it was no longer connected (green "connected" light was off). I pressed "Connect" again and it paired back up with ease.

I will say that the GPS unit has been in the car for several weeks, but hasn't been used and did not indicate a low charge. I can charge it up and try again if you think that could be the issue.

Thanks.

RE: Dyno run only - Tips?

2010-05-04T03:32:28Z

Okay .. I thought it had to be started from a stop. So, I'll try starting it then flooring the throttle. I had been trying to start it, then slowly go up to my gear then flooring it. It starts logging at the right speed but the numbers just seem off. I could understand 10 or 15 hp, but not the huge gap I've seen.

RE: Dyno run only - Tips?

2010-05-03T20:05:31Z

You don't need to start your run from a stop, but you do need to accelerate hard throughout your run in order to get the most accurate results. Dynomaster has some filtering in place to smooth the data. If you spend a lot of time coasting, it will skew the results. Also, make sure your vehicle weight is correct.

Jeff

RE: Dyno run only - Tips?

2010-05-03T15:28:30Z

Just an update on this ...

This method works great in theory ... setting the start and stop MPH to match your gearing. The graphs show correctly and it functions as intended.

But, I have a question about the accuracy of the results using this method.

Based on the results I'm getting (~100+hp LOW) it seems that even using this method, the power is still calculated from a stop. Meaning, if you accelerate slowly to your power run gear then hit the throttle, your numbers are low.

Is this true? Are power calculations skewed if you don't launch hard and go WOT through the gears till the log stops?