Rusty Nuts Posted July 21, 2003 Share Posted July 21, 2003 I was wondering if a car has to have a speedo or can u drive it without a speedo as long as u dont exceed the speed limit. all suggestions welcome shindha Quote Link to comment Share on other sites More sharing options...
Guest Posted July 21, 2003 Share Posted July 21, 2003 I'm 99.9% sure that a speedo is a legal requirement. It's not good enough to stay below the speed limit. Apart from anything else, if the speedo is knackered the odomoter probably will be aswell and so you won't be recording how many miles you are travelling. Quote Link to comment Share on other sites More sharing options...
S8ight Posted July 21, 2003 Share Posted July 21, 2003 you have to have a way of telling the cars speed. why wouldnt you want a speedo ? Quote Link to comment Share on other sites More sharing options...
Blatman Posted July 21, 2003 Share Posted July 21, 2003 My sprint car speedo hasn't worked since I started sprinting it 4 years ago. Granted, it hasn't done much mileage, but it's also passed every MOT since. Have you ever seen an MOT man check that the speedo actually works? No, neither have I.......... I can tell what speed I'm doing by what gear I'm in, and how many revs I'm pulling....... Quote Link to comment Share on other sites More sharing options...
damianc Posted July 21, 2003 Share Posted July 21, 2003 I was stopped nr Elvington a while ago by the traffic police. I was asked whether my speedo was working and replied that it wasn't. Nothing was said of this & I can only assume that the guy knew his job. Like blatman I've learned to work out speed through revs & gears Quote Link to comment Share on other sites More sharing options...
S8ight Posted July 22, 2003 Share Posted July 22, 2003 come to think of it, if you have a spedo fitted it must work. Quote Link to comment Share on other sites More sharing options...
oioi Posted July 22, 2003 Share Posted July 22, 2003 my original speedoi doesnt work (lost the expensive angle device and it was always inacurate so thought sod it) On my MOT's the speedo question has been crossed out and Not Applicable written! I have since fitted a little push bike speedo (cos I needed to know when to put petrol in the car!! which works a treat and is far more accurate than the original. If you have a limited mileage policy and no speedo how do you prove to the insurers that you were adhering to the policy? Shindha - cheapest solution to a knackered speedo problem (if you want one) is fit a bike speedo - about 10quid from halfrauds or similar Quote Link to comment Share on other sites More sharing options...
david.c Posted July 22, 2003 Share Posted July 22, 2003 I can tell what speed I'm doing by what gear I'm in, and how many revs I'm pulling....... Doesn't it take your eyes off the road when your pushing the buttons on your calculator David Quote Link to comment Share on other sites More sharing options...
7SE Posted July 22, 2003 Share Posted July 22, 2003 My understanding is that a speedo must be fitted for the MOT, but since it is a static test it is not possible to test whether it works But police at the roadside would be applying Construction and Use regulations which go wider than the MOT. Interestingly, (or not! until emissions regs were brought in, the engine didn't even need to work to pass an MOT. Quote Link to comment Share on other sites More sharing options...
samcooke Posted July 22, 2003 Share Posted July 22, 2003 I've had three cars pass various MoTs with busted speedos, for various reasons. I was stopped in my old 914 for executing a dangerous manooovah (no idea how to spell that) the police then spent 10 mins checking all my lights and tyres and stuff, found the speedo didn't work went away to find out if that was illegal, came back and told me to get on my way - so presumably it wasn't. Quote Link to comment Share on other sites More sharing options...
Blatman Posted July 22, 2003 Share Posted July 22, 2003 Manoeuvre [/smartarse] Quote Link to comment Share on other sites More sharing options...
bootleboy Posted July 22, 2003 Share Posted July 22, 2003 How do you fit a push bike speedo - where does the sensor go? Quote Link to comment Share on other sites More sharing options...
7SE Posted July 22, 2003 Share Posted July 22, 2003 I made up a bracket using a piece of alu sheet and bolted it to the back of the front caliper, using the caliper bolts. Mounted the sensor on the bracket, duct taped the magnet to the inside rim of the front wheel. Quote Link to comment Share on other sites More sharing options...
Blatman Posted July 22, 2003 Share Posted July 22, 2003 Which is fine until you rotate the wheels/tyres....... If/when I fit a bycycle speedo to the sprint car, I'll epoxy the magnet on to a hub/disc bolt, and fab up a bracket for the sensor, allowing me to change wheels/tyres without losing speedo functionality.......... All I need to do now is work out if it's possible to power the cycle speedo from the car, rather than batteries........ Quote Link to comment Share on other sites More sharing options...
oioi Posted July 22, 2003 Share Posted July 22, 2003 several ways to fit a bike speedo. depends on if you have swept wings or cycle. cycle is easy (if you are not changing a wheels a lot) fit the sensor to the cycle wing bracket and the magnet to the wheel. the wires wont be long enough so you will have to splice in some extra length but this isnt a problem. distance between sensor and magnet is critical. dont buy a wireless one as they work on line of site and wont work on a car. swept wing is slightly trickier. i had the sensor attached underneath the track rod end close enough to get a reading off the magnet which was on the brake disc below the pad area. the magnet was expoyed on. this had the added benefit of being able to change wheels. i lost the magnet after about 1 1/2 years at a track day when i seriously cooked the brakes (blue......). although the magnet was well away from the bite area i think heat killed it. The calibration is easy. for best results find a flat bit of tarmac and roll the car forward so that the wheel rotates three times. then just enter the wheel circumfrence. i have had long (and sometimes heated) discussions with the ne7ers about effect of tyre warming on accuracy. IMO its not worth losing sleeping over unless you are a highly anal type!!!! (believe me this argument went on for about 1000 emails!!!! Blatman - why do you want to power from the car batteries? the only issue with a bike speedo is that they generally dont have a back light so reading speed at night is a bit tricky.... OiOi Quote Link to comment Share on other sites More sharing options...
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