Definitely outside stated specs (if we can confirm them)
Don't waste your time arguing with Holden re the accuracy of your speedo or fuel gauge.
Holden specification for the speedo is 60 -0 /+2 km/h
100 -0 /+2 km/h
160 -0 /+3 km/h
Benboy,
Where did you get the Specification on the Speedo. Can't seem to locate anything on stated accuracy.
I agree on the Fuel guage, the VZ was a shocker, but it did force them to update the software more than once to get it a little more accurate.
If you look at my figures that I quoted on what I have found, you will will find that I am outside of those tolerances. I ran another test with actual speeds that they rate the speedo at, and I get the following....
at 60km/h showing 63km/h (+3)
at 100km/h showing 104km/h (+4)
at 160km/h (not worth losing licence)
Definitely different from the Specs that "Holden" are quoting.
Also those specs that you quoted would be exactly how I expect the numbers to be, a slow exponential curve maintaining reasonable accuracy. However based on the figures that I see, they actually appear to be linear, increasing at a fixed rate as the speed increases.
I honestly think that they couldn't be bothered writing the software correctly, and went for a quick and simple % figure.
Grantisaac,
In regards the GPS accuracy. They are actually very accurate in their speed measurements. Almost everyone else claims that they are well within 1km/h, with the following rules
1) Straight road (Freeway is pretty straight)
2) No buildings on road (Again freeway is very clear of buildings)
3) More than 5 satellite fixes (thats why the only tests I run 7+ satellites)
4) Flat road (not undulating)
5) Decent Dedicated GPS Unit, not a GPS in a phone.
As I previously mentioned the same GPS in the VZ was within 1km/h right across the legal speed range.
NeilF,
I was trying to run some tests on this, but on the freeway, there is the normal 5km test poles, but each time I have found it, I have been in traffic with trucks, however, initial thoughts based on some of the measurements, does appear to show it being out by a small margin, whereas again the VZ definitely was tested against this and was spot on accurate each time.
1991_Vn2nV,
I agree with you on the variance of Wheel rim and tyre choices now available for the VE, and the possible impact it may make on the speed, however as a lay person, I was under the impression that this is taken into account by rim and tyre choices correctly matching. As a Guide the VZ came standard with 15", yet the Equip version came with 17" (which is what I had), yet my speedo was still accurate. I agree with a small tolerance for wear as well, but not the 4km at the 100Km/h mark.
This is why I am trying to gauge if this inaccuracy is right across the range of VE Commodores, across the range of tyre sizes, whether anyone has raised it before.
I will raise it at my next service, probably a few weeks away at the moment, and will let you know what is said. No harm in someone raising it earlier, if their service is due. Anyhow any further comments, please add.
Regards
Bob