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Posted: Wed Jun 24, 2009 11:28 pm
by d_harris
the TPM on ANY Ford Speedo is 1000. They changed the pinion in the gearbox according to final drive ratio - a possibly useful factoid there
Posted: Wed Jun 24, 2009 11:35 pm
by bmcecosse
Ahh - useful to know that Dan!!
Posted: Thu Jun 25, 2009 12:21 am
by mike.perry
By the end of the rally I hope that my speedo chart will be ready. I just need to check the data on 1098 LCVs. A few KPH speedos on our overseas visitors cars would be useful
Posted: Thu Jun 25, 2009 8:48 am
by bmcecosse
So - if the sierra gearbox is set to drive a normal Ford speedo - you will need a 1000 tpm speedo - fairly sure there is a Mini speedo very close to that!
Posted: Thu Jun 25, 2009 2:26 pm
by linearaudio
bmcecosse wrote:So - if the sierra gearbox is set to drive a normal Ford speedo - you will need a 1000 tpm speedo - fairly sure there is a Mini speedo very close to that!
Surely when fitted to the Minor, that will alter depending on wheel size and diff ratio, compared to the particular wheel size/ diff ratio of the "donor" Ford? Or is the heat baking my brain??
Posted: Thu Jun 25, 2009 2:44 pm
by 8009STEVE
or follow some trucks on a flat open road - they will be doing 56 mph!
Speed Limits for trucks are :-
Single carriageway 40MPH
Dual carriageway 50MPH
Motorway 60MPH
Under EU laws, trucks are restricted to 89KPH (56 ish)
Posted: Thu Jun 25, 2009 4:00 pm
by bmcecosse
Most Fords of that era have 14" wheels - I'm assuming the tyres will be near enough - especially as many fit bigger tyres to their Minor anyway! I think if you get a speedo within 55 you are doing well - although I have to say my 1244 with3.73 diff and 155 tyres on standard rims seems to be very very accurate!
Since trucks are goverened to 56 mph - you can be sure they WILL be doing 56 mph unless there is a serious gradient against them!