Police calibrated speedo

R

Rover999

Member
Has any body out there have a police calibrated speedo for my v8 it was made by rover for the cars.
any ideas
regards
bob
 
Were the Police cars fitted with different speedos? Why would it need to be calibrated differently?

As far as I am aware, it is the angle drive that attaches to the transmission / gearbox that is responsible for ensuring that the speedo reads accurately in relation to road speed.

Ron.
 
Were they manufactured by Jaeger or a different manufacturer?

harveyp6 wrote,...
They weren't calibrated differently, they were calibrated more accurately.
Click to expand...

That seems appropriate.

Ron.
 
Demetris said:
https://www.youtube.com/watch?v=wNVOG73cBCw

This film has been posted before, but it seems appropriate to post it again now, as it shows very well the calibrated speedo in use.
Click to expand...

No not seen that before, thanks very much for that link real P6 porn! interesting to note the prevalence of P6's on UK roads, far far greater than here in NZ at that time.

Graeme
 
Interesting, it appears that the original speedo is disconnected.

I assumed that they would both work and the calibrated one was for the passenger to verify the offense.

Colin
 
arthuy said:
Interesting, it appears that the original speedo is disconnected.

I assumed that they would both work and the calibrated one was for the passenger to verify the offense.

Colin
Click to expand...

In order to keep both speedos operational, it would require a splitter, a small box with cogs (well, a tiny gearbox really) fitted somewhere along the length of the cable. This has two outputs to provide motion to two cables, required for the two speedometers. This was used widely in the taxis, when they were still using analogue taximeters.

To avoid all that, they just disconnected the cable from the factory spedometer, and connected it to the calibrated one. The latter was also visible by the driver, so there was no real need to have two operational speedometers. I remember sometime in the late '70s that a tachograph became compulsory in commercial vehicles (well, trucks and buses...) 12 seater Land Rover station wagons were classified as small buses, therefore they had a tachograph fitted somewhere in the dash, connected to the original cable. The factory speedo was not operational any more.
 
Demetris said:
This was used widely in the taxis, when they were still using analogue taximeters.
Click to expand...


As far as I remember Taxis with a BW35 had two outputs on the gearbox, one for the speedo, the other for the meter.
 
harveyp6 said:
Demetris said:
This was used widely in the taxis, when they were still using analogue taximeters.
Click to expand...


As far as I remember Taxis with a BW35 had two outputs on the gearbox, one for the speedo, the other for the meter.
Click to expand...

Well, taxis with BW35 were virtually non existent in my neck of woods. :roll:
I guess you are refering to FX4s etc, while i was refering to normal saloons from W123s to 505s etc converted to taxis.
 
That was an interesting video, thanks for posting Demetris!

Had not seen a speedo like that before, certainly very different to the factory item.

Ron.
 
rover s part number for the calibrated speedo is 586545 and this fitted into a pod. the Met calibrated speedo was a lot larger and sat in a metal frame like in the U tube clip.I am after the smalle one that fits into a pod.I hope this clears things uo. Regards Bob
 
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