17 replies to this topic

[Peter_NottinghamS]

How sure are you that the gearbox is original? The milometer would be a better starting point as it's directly geared.

 

I know the gearbox isn't the original as it was sold as an automatic!

 

Peter 

[Peter_NottinghamS]

Mine is bang on thanks to Guessworks speedo ratio calculator.

 

Oddly in an ideal world it should be doing 27 mph at an indicated 30 mph just like every modern car so that way there is less chance of being caught speeding.

 

I have to remember that when going through the countless average speed cameras

 

Oh my! 

I've checked the Guessworks speedo ratio calculator and I need to determine what my gearbox has as I've no idea what the final drive is, etc.

In the meantime, the speedo has stopped altogether (cable snapped again?) so it's a little academic right now.

 

Peter 

[Ethel]

Guessworks engine number looker upper could also be useful then - if you have one.

 

If you haven't, you could stick it in 4th & lift a front paw off the ground. The number of engine revolutions you get for a complete lap of the raised wheel will be double the final drive ratio - or equal to the number of turns the rotor arm does.