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speedo ratios
Posted: Wed Feb 09, 2011 11:56 pm
by polo2k
Hi all,
I have a 1963 1098 4 door that is fitted with 13" wheels and a 1301 speedo
I am planning on changing from the 4.22 to a 3.9 diff. how can I get the speedo to read right again? is there an inline gearbox that I can use?
Re: speedo radios
Posted: Thu Feb 10, 2011 4:25 pm
by mike.perry
I am running a 3.9 diff and 175/80X13 tyres and my 1408 speedo is spot on. Before you change speedos check yours with a Sat. Nav. The only thing that affects the speedo gearing is the tyre size and axle ratio.
There is a comprehensive list of speedos on the Series MM website, Car Ident.
http://seriesmm.mmoc.org.uk
Re: speedo radios
Posted: Thu Feb 10, 2011 6:16 pm
by bmcecosse
1248 from a Mini is absolutely spot on with 3.7 ratio and 155X14 tyres, But it doesn't play any tunes.....
Re: speedo radios
Posted: Thu Feb 10, 2011 8:24 pm
by charlie_morris_minor
the other option, done by another member.. is to strip the paint of the current speedo.. go for a drive with a satnav and mark the speedo at 10 / 20 ... etc etc
Re: speedo radios
Posted: Thu Feb 10, 2011 8:28 pm
by chrisryder
charlie_morris_minor wrote:the other option, done by another member.. is to strip the paint of the current speedo.. go for a drive with a satnav and mark the speedo at 10 / 20 ... etc etc
the downside to that is that the mileage will still be reading wrong even though the speed is right!