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OBD II 0-60mph Software

C2kev

C2kev

Car  SAAB 93 Aero TTiD SS
I had a little with play with my laptop/OBD reader last night and was just wandering how accurate they are when timing 0-60 and 1/4 mile sprints. My car is a standard 2004 172 and all the times i recorded (about 5-6 runs)were under 6.7secs, but the best are on the pic below. Are these good, bad or average? ..........And NO! I am not a chav! I just tried it out of interest to see what it could do

DSC00060.jpg
 
Awaits "on your private road comments" RE: current speed. Impressive times if that is accurate, no idea on the software though :S
 
Software used is called Digimoto. I know the book speed is 7 seconds, so how accurate is this likely to be? i would have thought it was correct if its reading from the cars ECU. the worst time did was 6.9 with the esp on and which gave a bad clutch burning smell afterwards, i assume it was the clutch anyway.

And yes it was on old airfield by the way
 
Is this sort of thing GPS based? Small difference I know but my speedo (and plenty of others) over reads by at least 3 MPH when going slowly and more like 5 MPH at motorway speeds compared to the trip computer (though thinking about it this would make the 0-60 time even longer) Out of curiosity what other things can this OBD/laptop combo do?

Finally, where do people find all these dis-used runways (which also happen to be open and don't have big airport-like security fences) :p
 
gdw said:
Same question here please? and what ODB reader did you use?
Click to expand...

ODB reader is an ELM-327 USB

not very good pics but just took these of my laptop screen

DSC00065.jpg

DSC00064.jpg


obviously reads and or resets faults and turns off warning lights
 
Steven103 said:
Finally, where do people find all these dis-used runways (which also happen to be open and don't have big airport-like security fences) :p
Click to expand...

Look on google earth, Lincolnshire/Bomber County has loads of them left over from WW2.
 
Thanks for the info mate, I personally think the times a little too low but quite impressed in what features you get for very little money (assuming you get it from ebay)
 
Roy Munson said:
Reminds me of danger to manifold :o
Click to expand...

Hahaha - "Shut up, shut up" - I never understood why the floor fell out either shortly after

This kind of thing is to be taken with a pinch of salt as it uses the cars own systems for measuring distance Vs speed/load to roughly work it out. They are pretty good if you do it on a long flat stretch but try cheating it firstly by going up a decent % incline and then again only coming down it and then see how different the results are.
 
MicKPM said:
Hahaha - "Shut up, shut up" - I never understood why the floor fell out either shortly after

This kind of thing is to be taken with a pinch of salt as it uses the cars own systems for measuring distance Vs speed/load to roughly work it out. They are pretty good if you do it on a long flat stretch but try cheating it firstly by going up a decent % incline and then again only coming down it and then see how different the results are.
Click to expand...

i'll give it go if i can find a suitable road.......whoops errrmm sorry i meant a decent uphill runway and post the results
 
I have all this via my Android phone. The program uses GPS also but not sure if it's used when doing the 0-60's...
I've not got round to doing times yet, I'll have to try it out.
 
has anyone used this software on android yet? I have a OBD 2 bluetooth connector, my phone finds the bluetooth device, but asks for a pass code when i try to connect. I have a HTC desire S with Torque installed btw.
 
I've got a bluetooth adaptor and use torque on android and racechrono on windows mobile.

Basically they're not very accurate at all. Theres a couple of problems, first is refresh rate. The OBD speed runs at 3-4hz so you have 0.5 seconds error already (starting and stopping). Some programs also use the gps which on a phone will refresh at 1hz or you can use a seperate adaptor than can run at 5 hz.

When I plotted a graph of gps speed Vs OBD speed I got a large difference on acceleration but no difference at constant speed, I'm not quite sure what was going on, wheel slip maybe.

My best recorded 0-60 time is 5.5 secs which was part of a 1/4 mile run that had a 99mph terminal speed, both of which aren't possible.
 
Yeah 1234 although I didn't need to enter it on windows it just picked it up (running android and windows duel boot)
 
Yeah no problem, its the one the O.P. mentioned earlier in the thread so should be fine.
 
Managed to get this paired last night, 1234 worked :)

Works good, it claims 156.2bhp on my drive to work but didnt take it all the way through the rev range. The revs read accurately (if a slight bit delayed). Havent got any fault codes to test it on yet though!
 
Last edited:
I havent used the drivers that came with the OBD2 bluetooth adapter. I've been using the Torque app on my HTC desire S. This is very easy to use! so easy to select the required on screen gauges and save them to profiles for each car.
 
doy you have a laptop? why not get the one with the wire for £15 instead of a bluetooth one for x amount and an android phone for £100?
 
Ian_s said:
I've got a bluetooth adaptor and use torque on android and racechrono on windows mobile.

Basically they're not very accurate at all. Theres a couple of problems, first is refresh rate. The OBD speed runs at 3-4hz so you have 0.5 seconds error already (starting and stopping). Some programs also use the gps which on a phone will refresh at 1hz or you can use a seperate adaptor than can run at 5 hz.

When I plotted a graph of gps speed Vs OBD speed I got a large difference on acceleration but no difference at constant speed, I'm not quite sure what was going on, wheel slip maybe.

My best recorded 0-60 time is 5.5 secs which was part of a 1/4 mile run that had a 99mph terminal speed, both of which aren't possible.
Click to expand...

Yeah the reasons for error sound about right tbh... I got a 0-60 of 5.39 and a 1/4 mile of 14.2 @ 98mph properly times at York so the actually times/speeds are about right if a little too high for a std car
 
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