Issues & Defects from factory

Gee

Yes, we are all getting over it, hence the leprachauns and such, however, my additional 20c worth.

whenever manufacturers specify the measurements of components (from wherever they get them) there is always a margin of error that needs to be stated. Nothing manufactured is ever 100% to spec. If I specify a screw of 10mm length and 5mm width it always 10mm length +/- 5 microns, or whatever. The smaller the margin of error the harder it is to meet that error, i.e. the manufacturer has to throw out those that don't mee the specs - the smaller the margim of error the higher the manufacturing costs.
Now, If I know that I cannot produce a speedo that shows less that the 'true' speed for legal reasons and I want to keep costs down then I will specify the components be made to show 'true' speed + 10% with a margin of +/- 5%. Then I am keeping my costs down and know that the speedo will (almost) never show less than the 'true' speed. i.e. it will show from 'true' + 5% to 'true' + 15% at the outside margin of error.

Somple - costs are low and I am now within my legal obligations. Hence, speedos show around 'true' + 5 - 10% on average.

math rules!

G

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370er

Does this mean all the 0-100km times in reviews for the Z are incorrect and it's really more like 0-91km?

ChrisSlicks

No. All those tests are performed with high-end testing equipment such as optical accelerometer. What the car actually reads on the speedometer is irrelevant.