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MG MGB GT V8 Factory Originals Technical - V8 Speedo conversion

Does any one know of a way to re calibrate an MGB1800 speedo for use with V8 converted car? The speedo is a 100mm unit from 1970. The gearbox i'm using is a Rover SD1 5 speed manual. Are there any gears available to convert the gauge myself, if so how do I work out which ones i need. Any Ideas?

Andy
A.S. Kenning

I need this also and was to go to a company called Speedy Cables.

Don't know how to DIY though I afraid.

jim
j w mcglynn

They make up a little box of gears that goes somewhere in the speedo cable. Firstly however you need to find someone with a good calibrated speedo, follow them for a measured 5 or 10 km and note the reading on your odometer ie 8.5 or 11.2 miles, whatever. Then do the math. With a toyota supra box and 15 in wheels with 60's on them its 0.7 to the km.
Peter

Here is a link to what I did

http://www.geocities.com/v8mgb/speedometer.html
Jim Miller

Speedy Cables do not put a gearbox into the drive cable - the speedo is actually recalibrated to suit your gearbox, final drive and tyres. One can then use a speedo cable available from one of the specialists to mate the Rover gearbox with the MG speedo head.
David Daw

I have used Speedograph Richfield in the past; at one time they were very slow, but I understand that things have improved.

http://www.speedograph-richfield.co.uk/

They will recalibrate a speedo for you, make a new dial with increased deflection, and provide you with precisely the cables you require.

http://www.speedograph-richfield.co.uk/

NJSS
Nigel Steward

This thread was discussed between 13/05/2004 and 18/05/2004

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