21 replies to this topic

[Anarchy]

Not looked into it but is this one of the ones that runs from the OBD2 port and not GPS based?

It runs from the OBD2 port and not GPS based.

These run out of the OBD2 port and are pretty accurate to be honest Dunc.

Pretty accurate, more so in my shed and my van.

Maybe if your at a local meet have a shot with the performance box for reference? More than happy to let you use it to record the times

I'll have to take you up on that. Would love to give that a go.
Thought I'd throw up a screen shot of the VI program, looks pretty accurate accept on 2 readings, might be because of a drain in the road (the private one) causing a shudder.



Times were: 0-30: 2.0, 0-40: 2.4, 0-50 2.4 (obviously wrong!), 0-60: 5.4, 0-70: 6.9, 0-80: 6.9 (obviously wrong!), 0-90: 11.3, 0-100 15.3 (I eased off a little, d'oh!)

The VI monitor seems to work well. Also has lots of other good features like 0-30-0, 0-60-0, 0-100-0, which also gauges your reaction time. It will do a dyno test, which I haven't had time to do yet (or a dry day).

   for a VI monitor, it does do a lot more which I won't list but I wish it had a few more features, like average fuel consumption and trip counter.

According to that 50-60 takes 3 seconds, did that need a gear change? Seems a lot considering 0-50 took less than 3?

edit
Ah I see that is the blip you are talking about, so 0-40 and 0-50 are not accurate.

Edited by Anarchy, 10 November 2010 - 05:53 PM.

[Graeme Lambert]

According to that 50-60 takes 3 seconds, did that need a gear change? Seems a lot considering 0-50 took less than 3?

It also took the same time to do 0-40mph as it did 0-50. So it's saying it was travelling at 40mph and 50mph at exactly the same time (or at least within a tenth of each other).

If i'm right, the VI takes its data from the OBD port and therefore speed from whatever provides the speed signal to the speedometer. I'm not sure what provides the info on a VX, but if it's an ABS sensor or something the wheels could be spinning at a higher speed than the car is moving at (especially on a gearchange) and providing incorrect data.

Edit: Just seen your edit Anarchy. Rubbish...i missed that data. Though what i wrote is still correct i suppose!
G

Edited by Graeme Lambert, 10 November 2010 - 05:57 PM.