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6th March 2011, 12:07 | #51 |
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MG ZT+ 135 Join Date: Jan 2011
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GPS satellites are passive, they cant be 'busy'. The only time they can be effected in that way is if they are being remotely reprogrammed or having diagnostics run on them and that is done individually, so as not to bring the system down. The effect on our GPS units at that time is extremely minimal, if there is even an effect.
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6th March 2011, 16:51 | #52 |
This is my second home
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Egremont that is a very impressive piece of work
Well done. For most people with 18" wheels the speedo is fairly accurate <5% out as a rule but as the wheels get smaller the inaccuracy increases. There is no option on T4 to calibrate the car by stating wheel or tyre size so your gadget would do the trick nicely |
6th March 2011, 17:58 | #53 |
This is my second home
MG ZT+ 135 Join Date: Jan 2011
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Checked my car today, its reading no more than 2 mph faster than actual at any speed. Quiite impressed really and i now know the limits when going past revenue generating devices.
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6th March 2011, 18:42 | #54 |
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speedo
I checked our car speedometer against a Sat Nav a while ago and found on average the speedo display to be 3mph faster than the sat nav, this is on a 2004 ZT. Watching the obd display on 7.3, which shows the same speeds as the speedometer. taking the obd to 7.4 and it agreed at all speeds with the sat nav, suggesting that on 7.4 that it pretty close to true speed. If you don`t trust your speedo or sat nav then use the kilometre (1/10) markers at the side of all of our motorways and time yourself over a set distance.
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7th March 2011, 22:43 | #55 | |
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Nic
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7th March 2011, 22:54 | #56 | |
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