Acceleration measuring, [how accurate]

[Sisson]

With the new version of Vagcom you can measure 0-60, 0-100 30-70, 1/4 mile, blah blah,

How accurate is it? and How does it know how far you are traveling???

Regards

Adam

 

[BeartheBruce]

I assume you have read this? Acceleration

I think I remember the guys saying it was accurate to about 5% but I can't find a reference to that anywhere on our site. I'll have to ask when I get to the office tomorrow.

-Bruce-
Ross-Tech

 

[Sisson]

the times it was coming up with were say 7.2 +/- 0.69,

Does that mean it could be 0.69 below or above 7.2 secs?

 

[Riddick_m3]

ive got a gt tech meter on my phone it uses a blue tooth sat nav reciever to track where you are and will measure 0 - whatever you want, 1/4 mile times, terminal speed ect.ect and gives a full results page when you finish a test too

 

[Sisson]

i have one of those G-tech timers, but im not sure how accurate it is??? especially as its just plugged into the fag lighter/ and has no gps???

 

[Theresias]

Does that mean it could be 0.69 below or above 7.2 secs?

That means the real value is between 6.51 to 7.89 s, which is 7.2 +/- 0.69.

This value depends on the logging speed, so if you are using turbo mode the values should become more accurate.

 

[Riddick_m3]

i have one of those G-tech timers, but im not sure how accurate it is??? especially as its just plugged into the fag lighter/ and has no gps???

well i dont know what thing you have got then lol sounds like some chewy thing from the front of max power........... mine is software for your phone that uses a blue tooth gps reciever the same thing you use for tom tom mobile then with that it measures 0-60 1/4 mile ect. loads of results even time from 70-100 and stuff like that

 

[chillcupra]

where do you get that software for your phone from?

 

[Riddick_m3]

off the web but need the symbian operating system on your phone, i got a nokia 6680

 

[OLDOILER]

i have one of those G-tech timers, but im not sure how accurate it is??? especially as its just plugged into the fag lighter/ and has no gps???

I also have a GTec Pro RR , once you have setup the rpm scaling and the CORRECT vehicle weight (including yourself!!!) the system works off 3 electronic sensors.
I have had to do at least 5 runs and then average out the results, it should be within 1/2sec - hope this helps

 

[pickie]

what is the name of the software for the mobile ??? do they do a version for a pda or is there other software for windows pda's

 

[EddyH]

With the new version of Vagcom you can measure 0-60, 0-100 30-70, 1/4 mile, blah blah,

How accurate is it? and How does it know how far you are traveling???

Regards

Adam

Distance is calculated from rotations of the front wheels so if you wheelspin then the 1/4mile time won't be particularly accurate. The acceleration figures shouldn't be that far off though as already discussed.