Guru Posted March 13, 2006 Share Posted March 13, 2006 Ok well I have had a km conversion but not sure how good it really is. I have a Road Angel and a TomTom which can both monitor speed. Now when my clock is saying 40 everything reads the same, but, as soon as I get to say 80 the others read like 76mph. Obviously this is only noticable in higher speeds. It sounds like I am slightly out but am not sure how accurate the RA and TT really are? Any thoughts? Link to comment Share on other sites More sharing options...
jackso11 Posted March 13, 2006 Share Posted March 13, 2006 Sat Nav is more accurate than your speedo at constant speeds. So if you are going at 80 and staying at 80, and your speedo reads 76, your sat nav will be correct. I am not sure what the police cameras go by but I know they used to calculate error values of speedos at 10% +2 mph, so when your speedo says 80 you can actually be doing +/- 9mph, if that is still how they work (I found that out about 10 years ago) 76 is a reading within the error equation so you would be fine. I just read that back......I sound like a geek! Link to comment Share on other sites More sharing options...
Steve W Posted March 13, 2006 Share Posted March 13, 2006 ALL speedos read OPTIMISTICALLY. AND the Soop reads more optimistically than most ! ! and as it gets higher, so, it gets proportionally high. Sounds perfectly right to me. Link to comment Share on other sites More sharing options...
Guru Posted March 14, 2006 Author Share Posted March 14, 2006 Ok that seems ok then. I pay more attention to my RA anyways Link to comment Share on other sites More sharing options...
SteveR Posted March 14, 2006 Share Posted March 14, 2006 My supe's speedo is spot on - even at 180kph it matches what a GPS device says I'm doing. NB: Remember that different wheel sizes will alter the speedo reading. Link to comment Share on other sites More sharing options...
Jake Posted March 14, 2006 Share Posted March 14, 2006 My supe's speedo is spot on - even at 180kph it matches what a GPS device says I'm doing.Mine too. I calibrated it with a GPS and Thor adjustable DSC. It was waaay off before that though. Link to comment Share on other sites More sharing options...
SteveR Posted March 14, 2006 Share Posted March 14, 2006 Mine's still 100% stock - must just be lucky with it being accurate I guess Is the Thor thingy part of the delimiter km->miles convertor chip jobbie Jake, or something additional? Link to comment Share on other sites More sharing options...
jackso11 Posted March 14, 2006 Share Posted March 14, 2006 How do I recalibrate my speedo? changed my wheels and tyres so I am sure it is out. Not by much though. Satnav says it is about 3mph out at 80mph Link to comment Share on other sites More sharing options...
Ian R Posted March 14, 2006 Share Posted March 14, 2006 mine was reading 192 at 178 leptons Link to comment Share on other sites More sharing options...
Scoboblio Posted March 14, 2006 Share Posted March 14, 2006 Mine over-reads like this too. I've got so used to the "comfort zone" when approaching speed cameras that I don't really fancy changing it Link to comment Share on other sites More sharing options...
Jake Posted March 15, 2006 Share Posted March 15, 2006 Is the Thor thingy part of the delimiter km->miles convertor chip jobbie JakeIf you mean the Thor DSC then yeah. Link to comment Share on other sites More sharing options...
monkey76364 Posted March 15, 2006 Share Posted March 15, 2006 So is there any way of calibrating it yoursef then ??? Link to comment Share on other sites More sharing options...
SteveR Posted March 15, 2006 Share Posted March 15, 2006 If you mean the Thor DSC then yeah. Yep that's the one - thanks Jake Link to comment Share on other sites More sharing options...
Guru Posted March 15, 2006 Author Share Posted March 15, 2006 My wheels are different to stock but same size and everything. I have no idea what chip is in there so may invest in a decent Thor one Link to comment Share on other sites More sharing options...
JohnA Posted March 15, 2006 Share Posted March 15, 2006 mine was reading 192 at 178 leptons sounds about right Mine is almost 10% off from 100mph upwards Link to comment Share on other sites More sharing options...
jackso11 Posted March 15, 2006 Share Posted March 15, 2006 I have the THOR one, but I didn't know you could recalibrate it? Anyone going to tell us how to do that? Link to comment Share on other sites More sharing options...
monkey76364 Posted March 15, 2006 Share Posted March 15, 2006 I have the THOR one, but I didn't know you could recalibrate it? Anyone going to tell us how to do that? Im still wating for them to spill the beans Link to comment Share on other sites More sharing options...
Guru Posted March 15, 2006 Author Share Posted March 15, 2006 It's probably "mamma's secret recipe" like most stuff Link to comment Share on other sites More sharing options...
Steve W Posted March 15, 2006 Share Posted March 15, 2006 Mine over-reads like this too. I've got so used to the "comfort zone" when approaching speed cameras that I don't really fancy changing it i think THAT's obviously the idea behind the 'optimistic' bit...... if you THINK you're doing 100 when you're only doin' ~90, then............... Link to comment Share on other sites More sharing options...
sarjo Posted March 16, 2006 Share Posted March 16, 2006 What can you do then cus mine massively over-reads even at lower speeds. Can change in wheel size affect mph readings? Link to comment Share on other sites More sharing options...
Scoboblio Posted March 16, 2006 Share Posted March 16, 2006 What can you do then cus mine massively over-reads even at lower speeds. Can change in wheel size affect mph readings? Thor do an adjustable DSC while you can use to make it spot on. Yup, changing the wheel size will adjust the reading of the speedo, the bigger the rolling radius the more the speedo will under-read I believe. Link to comment Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now