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Post by parispp on Dec 12, 2014 22:22:19 GMT
Hi All, Been a while since I have been on and the restoration is still happening but slowly... I would really love to get this speedo in KM/H but the SN is covered conveniently by the needle. I have tried old Jaeger catalogues and Smiths. The no. above the Km/h seems to mean nothing. Any ideas where i could locate this? Never sure if I am speeding or driving like a little old lady. For a Rover P5 1966 Mark III coupe. Many thanks Paris  |
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Post by Phil Nottingham on Dec 13, 2014 6:27:34 GMT
Speedograph of Nottingham service and re-calibrate all speedos
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Post by enigmas on Dec 13, 2014 9:42:34 GMT
Paris I live quite close to you. We met some years ago and discussed our cars both MK3s if you recall, mine obviously no longer to original factory specifications. I had my speedo (OEM) recalibrated to kph and also reconfigured for a much lower (numerically) diff ratio. The speedo faceplate numbering was also changed to reflect this unobtrusively. I also had the tacho recalibrated but that's relevant to another change. There are several companies that will do this modification for you within a reasonable distance from your home. Whoever you choose to do the job, you'll be asked to supply some specific details that will ensure that your speedo reflects your current wheel/tyre combination. These are the people I used: www.yellowpages.com.au/vic/mulgrave/automotive-instrument-repairs-12443004-listing.html |
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Post by parispp on Dec 13, 2014 21:18:49 GMT
Many thanks - yes I do recall - just finally got her back having the front end re-done - much more solid now. She was making n awful noise on bumps and acceleration. Trying to sort a pesky oil leak despite all near seals!
Will check these places out.
paris
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Post by Warwick on Dec 14, 2014 6:33:38 GMT
Vince,
Do you know if they can rebuild speedos? The Range Rover speedo is getting near the end of its life. Turned over 400,000km a week ago. It's been making the classic clicking noises for several years and it takes ages for the digits to the left to turn over completely when the numbers to the right change from 9 to 0. The plastic gears will be almost worn out.
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Post by enigmas on Dec 14, 2014 9:01:14 GMT
Hi Warwick, well if they can recalibrate these units they must have access to a supply of components. I've never come across a worn out speedo in relation to the odometer. A quick call should sort the matter out.
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Post by johnwp5bcoupe on Dec 14, 2014 9:54:42 GMT
Hi Warwick, well if they can recalibrate these units they must have access to a supply of components. I've never come across a worn out speedo in relation to the odometer. A quick call should sort the matter out. Apart from the Dial the hairspring thickness and length is what makes the difference Vince.  |
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Post by enigmas on Dec 14, 2014 21:50:46 GMT
You've got me intrigued now John. How about a brief explanation re: the 'hairspring' function.  |
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Post by johnwp5bcoupe on Dec 15, 2014 13:10:11 GMT
You've got me intrigued now John. How about a brief explanation re: the 'hairspring' function. It's after the pickup disk Vince, I thought I had a picture of the spring mounted on the pointer  The inertia produced from the magnetic pickup is picked up by the drag cup basically tries to unwind the Hairspring so depending on where you lock the hairspring on the pinion will give you the start point ie the pointer ref 0 this can be finalized with the pointer. The Hairspring is basically the same in both heads, the dial will obviously be different, the odometer has 62% fewer teeth. This was Cyfs speedo which was quite a bit out (10mph) on calibration, when I fixed it I decreased the hairspring in the mounting ( a bit fiddly) until it was within tolerance, I calibrated it against mine so was within 3-4 mph @ 80mph. So the easy way is to just change the dial if you can find one and forget about the Odometer? I don't know if Rover had a proper dial made or just did what was done to Cyf's?  |
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Post by petervdvelde on Dec 15, 2014 14:48:40 GMT
On cars supplied to Holland there is a proper km/h dial fitted. I had a spare one but that is now fitted to the Coupe i bought a few month ago in the UK
Peter
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Post by johnwp5bcoupe on Dec 15, 2014 17:19:29 GMT
On cars supplied to Holland there is a proper km/h dial fitted. I had a spare one but that is now fitted to the Coupe i bought a few month ago in the UK Peter Thanks for that info Peter  |
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Post by Warwick on Dec 16, 2014 1:57:42 GMT
I find that despite our change to metric now being 40 years ago, I can still think in imperial units if I have to. I still remember our pre-metric speed limits and all they did was convert from mph to km/h and round up to establish the new limits, and these haven't changed, so I find using a speedo in mph quite easy. After all, the only speeds you need to know are the speed limits.
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Post by p5bdownunder on Dec 16, 2014 7:55:58 GMT
This was Cyf's speedo...( a bit fiddly)... Perhaps it would have been easier if you were going a bit slower...??  |
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Post by johnwp5bcoupe on Dec 16, 2014 8:13:24 GMT
This was Cyf's speedo...( a bit fiddly)... Perhaps it would have been easier if you were going a bit slower...?? You have to make sure the speedo is more or less linear so it was checked at 30,40,50,60,70 and 80  It was done at a set speed on my lathe impossible in a car |
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Post by guidedog on Dec 16, 2014 9:54:05 GMT
Wow.. John you have a lathe that does 80 MPH or is that KPH. What model is that then?  |
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Post by johnwp5bcoupe on Dec 16, 2014 17:45:22 GMT
Wow.. John you have a lathe that does 80 MPH or is that KPH. What model is that then? There is always one smartie pants it's a Super 7 Turbo |
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