Most likely the canusb.com solution uses two chips in their product, a CAN to k-line chip, then FTDI chip for k-line to USB. D2XX is a direct chip driver, rather than using the Windows serial port system. Likely you could also use the http://www.tactrix.com/ Openport cable if you expanded your drivers in your application. Most people won't shell out that kind of cash for a CAN to USB adapter.

"monitors" is my own moniker. I believe Hondata calls it "engine data" or "sensors". Without going too in-depth into the dyno calculation, there are a few critical data points that must be acquired: time, RPM, vehicle speed. There are also a few constants like air and pressure, weight of the car, drive ratio. You appear to have added some frills like timing, injector pulse, afr, etc to create a dyno run with far more pertinent tuning data than a typical dyno run.

I take it Hondata just logs all "sensors" whenever logging? If I were to generate a log that would integrate with your spreadsheet, what data is required in the log?

 

The OpenPort 2.0 does look nice, and it probably would work with my software. If someone sent me one to play with for a week, I'm sure I could get it to work. However, I'm not interested enough in it to buy one for myself.

Here's a list of parameters that I'm using for the dyno portion alone.
Time
RPM
Speed
Barometric Pressure
IAT
MAP
IGN
Knock Retard
Knock Level
Injector Pulse Width
Throttle Pedal
Throttle Plate
Gear
AFR

For the tuning portion, I also need:
VTEC
LTrim
STrim

However, I don't think I would provide the tuning functionality with a free download. It's just way too good to give away.

 

after Gernby got me curiuos with the screenshots from his .net app i've tryed soft dyno for the first time.
also a local pal have tried it and urged me to do the same.

all in all it works good and graphs are nice.
the graphs are shifted down for some reason - i mean max power shown is ~170 and max torgue is ~130 (at 6500rpm).

why this happens?

Thx,
Gennady

 

Most good dynos can already do that, but those are paid upgrades and many dyno owners/operators are too cheap to buy them, or too lazy to hook them up.

http://www.mainlinedyno.com.au/index...ories-software


Tim

 

Here my torque curve
Little bit surprised of the fast decay after 6200rpm and why it finish at 8250 rpm.
My setting is vtec engage at 4500rpm, rev lim set to 9100 rpm.

 

Your graphs will go up and down depending on incline / decline of the road, increased wind or rolling resistance, and obiviously changes in weight. For you guysoutside the US, there may also be differences in gearing that would throw it off. I'm not sure if you guys have the same transmission, final drive, and / or tires as the USDM AP2V2.

 

Thanks Gernby,
I supposed there were differences due to the car setting, as you confirme. No problem. I'll make all my tests and comparison same day, street, weight. I'm not interested in absolute value but relative ones.
If it's not a problem I'll post here some doubts and/or result.

 

Gernby,

I'm interested in giving the soft dyno a shot when weather warms up a little around here. A few questions for you..

1. All we need is the CANUSB adapter and flashpro?

2. Is this the correct CANUSB adapter listed for $139? https://imagecraft.com/jumptocan.html

3. Where does the CAN/USB adapter plug in..? It's a serial port on one end and USB on the other.

4. I'm a software dev and write .net code (vb/c+/etc) so hopefully wouldn't need too much handholding w/ the software.

Let me know what's required as I'd love to give this a shot. Thanks!

Edit: Hmm, actually the CANUSB adapter is needed only for "converting" the USB port to a serial port (since most laptops don't have these anymore)? So I guess the CAN232 "adapter" is also needed to actually plug into the obd2 port?

 

The dongle I use is this one, which is very similar (if not identical) to the one you linked. However, I have long-since decided that I can't share the CAN Dyno software. If it was just a CAN Dyno, I would share it, but I've put at least 500 hours into making it a full-on tuning suite. It's the foundation of my eTuning business. I actually plan to expand its functionality to include a web interface, which I would license to other eTuners. When I do that, I might split off the CAN Dyno functionality into a separate single-function app again. Honestly, there was so little interest in it that it's hard to justfiy the effort.

 

Fair enough.. I should've jumped on it when you were offering it via a "beta" period.. Ah well, I'll have to give your soft dyno a try regardless. Thanks!