The SVA manual says a speedometer has to be marked and calibrated up to the "design speed" of thr vehicle however I can't find refference to how this is determined.

Caber

I'm guessing that the design speed is the max speed you have designed the car to go, (including the rating of the tyres !!!!)
So as long as the speedometer could read a greater speed than that of your cars ability it should be ok.
That vague enough ??

Jason

Think I put 100mph, never had any problems.

I put 100mph too, this is what they use to check the rating of the tyres. I can't think of a speedo that reads less than 100.
(oh yes I can, old Mini!)

Marcus

But You can easliy make an old mini sail straight off the end of it's speedo. Mine does

Mine used to hit the needle stop on the back

Workout what speed peak power rpm is in 4 th and use that.

I put 100mph on mine, the SVA tester said 'who the fcuk are you trying to kid' and laughed. He said as long as the stated speed was less than the rating of the tyres it was not a problem.

the BOOK, 2nd edition, lists engine size (1100 - 1600?)and max speed, why not use those as starting point? Obviously if you have carzy tune engine it would exceed that by a little bit.

Bear in mind as already said, your tyres have to be rated to at least that speed.

I am not sure what the SVA will say but if you put 70 mph, since that is the speed little, IMO that should not be acceptable as it should be realistic.

[Edited on 6/1/06 by 02GF74]