chooch Member 256 Member For: 20y 11m 3d Location: Adelaide Posted 07/04/07 04:54 AM Share Posted 07/04/07 04:54 AM Hey, I was driving passed one of those police road side speed thingy's that show your speed. Anyway I was doing exactly 55km on the speedo on cruise control but the sign said I was doing 48km.I went back for a second time and same thing.Is this normal? or is my speedo out? Link to comment Share on other sites More sharing options...
ZAP No boost, no bottle, just my foot on the throttle! Lifetime Members 7,935 Member For: 20y 10m 24d Gender: Male Location: Sydney Posted 07/04/07 05:20 AM Share Posted 07/04/07 05:20 AM Seems a bit too much inaccuracy there. I would expect 50-52km from an indicated 55km. Do you run non stock wheels or tyres ?When I run my car at 100km/h the satnav says 96km/h. This has also been confirmed by the roadside speed advisories. Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 7m 11d Gender: Male Location: @ my laptop Posted 07/04/07 05:21 AM Share Posted 07/04/07 05:21 AM Those road side testers are only an indicator and not 100% accurate.Your cars speedo can be within 10% of actual speed to be normal and acceptable.A dyno can give you an exact speedo reading Vs actual speed Link to comment Share on other sites More sharing options...
chooch Member 256 Member For: 20y 11m 3d Location: Adelaide Posted 07/04/07 05:25 AM Author Share Posted 07/04/07 05:25 AM cool, I thought that might be the case.Zap, im using factory 18's and factory tryes. Link to comment Share on other sites More sharing options...
Trough Lolly Member 4,349 Member For: 20y 3m 30d Gender: Male Location: Mildura Posted 08/04/07 12:39 AM Share Posted 08/04/07 12:39 AM bah those trailer speedo things are CRAP one said I was doing 180 up my street once!!! Link to comment Share on other sites More sharing options...
EZ2CME Formerly XR6NA Member 3,512 Member For: 19y 1m 8d Gender: Male Location: Brisbane Posted 08/04/07 12:42 AM Share Posted 08/04/07 12:42 AM And what was your speedo saying Link to comment Share on other sites More sharing options...
tab Sucker Moderating Team 32,303 Member For: 20y 8m 13d Gender: Male Location: Brisbane Posted 08/04/07 01:28 AM Share Posted 08/04/07 01:28 AM 177 Link to comment Share on other sites More sharing options...
nang3 12" member Donating Members 2,107 Member For: 19y 6m 14d Location: Perth WA Posted 08/04/07 01:34 AM Share Posted 08/04/07 01:34 AM yeh there way off the mark, theres one that's been here locally for weeks and with my cruise set to 60 it varies between 55-85 with no other traffic.. makes ya wonder how accurate their revenue raising devices are Link to comment Share on other sites More sharing options...
EZ2CME Formerly XR6NA Member 3,512 Member For: 19y 1m 8d Gender: Male Location: Brisbane Posted 08/04/07 02:55 AM Share Posted 08/04/07 02:55 AM There was something on A Current Affair I think it was a week or 2 ago where they showed a university study which proved that there speed guns are inaccurate. From memory they wanted to take it further and they said that if they can take it further the police may be forced to pay back fines. Link to comment Share on other sites More sharing options...
mbjunior99 Member 4,359 Member For: 22y 15d Gender: Male Location: Brisbane Posted 08/04/07 03:01 AM Share Posted 08/04/07 03:01 AM There was something on A Current Affair I think it was a week or 2 ago where they showed a university study which proved that there speed guns are inaccurate. From memory they wanted to take it further and they said that if they can take it further the police may be forced to pay back fines.Yeah I saw that too. I hope that they do end up winning the case they were talking about! Link to comment Share on other sites More sharing options...
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