Hi as title says.
I am using a type 9 5 speed gearbox along with a cortina rear axle. Not sure what type of axle it is but i can tell you that the diff loads from the rear.

What i want to know is if any one knows what speedo i need to use in order to keep speedo reading as acurate as possibe for i.v.a

Many thanks

Davrus

Your speedo reading will depend on wheel / tyre diameter as well as diff and gearbox speedometer ratio. So it would be very difficult to buy one off the shelf that read accurately for your particular setup.

If you have a mechanical drive speedo Speedy Cables will calibrate it for you. Otherwise modern sensor drive electronic speedos can be adjusted by you to read correctly.

can some one recomend me a cheap electronic speedo that will be iva compliant.

cheers