shn7 Posted May 14, 2005 Share Posted May 14, 2005 I have the feeling that my speedo over-reads by a fair margin at higher speeds. I know that in a 30mph limit with one of those signs that comes on if you exceed the limit I can go past at an indicated 32-33mph. That's fine by me. In a 40 with the same type of sign I'm reading about 43mph before setting off the signs. However at an indicated 70mph it feels an awful lot slower when in a seven I would usually expect it to feel faster than in a quiet tin top. So I would ideally like to do some sort of on road speed check (without involving the BiB or one of Mr Gatso's finest). I have no experience of GPS thingummybobs but presume this would be the best tool to do the check. If this is the case is there anyone in the West West Sussex/East Hants area that could lend me such a device or come out for a ride in my seven (carefully phrased ) with me. Steve. Link to comment Share on other sites More sharing options...
Tight fart Posted May 14, 2005 Share Posted May 14, 2005 These are great to know what speed you are doing here A7 RDP pics here Link to comment Share on other sites More sharing options...
shn7 Posted May 14, 2005 Author Share Posted May 14, 2005 Yeah but tf I don't want to spend money on it 😬 Steve. Link to comment Share on other sites More sharing options...
Tight fart Posted May 14, 2005 Share Posted May 14, 2005 Cheaper still, stay at home. A7 RDP pics here Link to comment Share on other sites More sharing options...
Strangely Posted May 14, 2005 Share Posted May 14, 2005 Free: make use of the measured mile markers on many motorways. Time how long it takes you to travel that distance at an indicated 70 mph; calculate from there how quickly you were actually traveling. Link to comment Share on other sites More sharing options...
shn7 Posted May 14, 2005 Author Share Posted May 14, 2005 Good point strangley. Now why didn't I think of that most obvious of options 😳. Still if there is someone local that would like to let me play with their toy . Steve. Link to comment Share on other sites More sharing options...
Trevor Newman Posted May 14, 2005 Share Posted May 14, 2005 Not that local unless your out for a decent blat but you can borrow mine Link to comment Share on other sites More sharing options...
shn7 Posted May 15, 2005 Author Share Posted May 15, 2005 Thanks Trevor, I'll keep you in mind if I get nothing more local. Steve. Link to comment Share on other sites More sharing options...
Leadership Team SLR No.77 Posted May 15, 2005 Leadership Team Share Posted May 15, 2005 Fit a bicycle speedo - easily calibrated to be acurate to less than 1mph Checked mine using a gps and found it to be around 0.1mph out Stu. Link to comment Share on other sites More sharing options...
Sue Dinnim Posted May 15, 2005 Share Posted May 15, 2005 Steve, you can borrow my gps if you wish. Are you at Dunsfold next weekend? If so I can bring it over for you. Duncan Link to comment Share on other sites More sharing options...
Cloud 9 Posted May 15, 2005 Share Posted May 15, 2005 Steve..If your around Haslemere at some time you are welcome to take my Road Angel for a blat (if you have cig lighter socket to plug it into) I was suprised how much my speedo over read in 7 and tin top. John Link to comment Share on other sites More sharing options...
shn7 Posted May 15, 2005 Author Share Posted May 15, 2005 Duncan, That would be superb. Is it battery or do I need an onboard power source? John, Thanks, looks like Duncan has the perfect answer as I'll see him at Dunsfold. Steve. Link to comment Share on other sites More sharing options...
Grubbster Posted May 16, 2005 Share Posted May 16, 2005 Steve - I have a hand held GPS you can play with and I need to pop over sometime to see you (bring back your ball joint splitter and compare exhaust noise levels!). Roadsport build photo's here Le Mans 2004 photo's here Link to comment Share on other sites More sharing options...
shn7 Posted May 16, 2005 Author Share Posted May 16, 2005 Hi Steve, As above, looks like I'm sorted with using Duncan's GPS. Feel free to pop over though. Would be good to be able to get out for a blat with you and James sometime. I presume you've used the splitter successfully? Steve. Link to comment Share on other sites More sharing options...
Grubbster Posted May 16, 2005 Share Posted May 16, 2005 Splitter job done thanks Exhaust stil sounds the same after removal and refitting with extra care Roadsport build photo's here Le Mans 2004 photo's here Link to comment Share on other sites More sharing options...
shn7 Posted May 16, 2005 Author Share Posted May 16, 2005 Perhaps we need to get together for a sound comparison given our cars are similar spec. Steve. Link to comment Share on other sites More sharing options...
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