Well, that mucked up all my calculations!
And I realised I should have been comparing the wheel sizes to the standard Country tyre size.
I shall now go away and do some more sums before I open my gob again[
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You could well be right! I just did a quick search of the internet.
The majority of the sites suggests the following as standard tyre sizes. Obviously they may have been other alternatives available!
- Vehicle – Tyre – Rolling Dia
- Lesser Golfs – 175/70R13 – 575
- GTi – 185/60R14 – 578
- Syncro – 185/60R14 – 578
- Edition 1 – 195/50R15 – 576
- Rallye – 205/50R15 – 586
- Country – 195/60R15 – 615
- Country Chrom – 205/60R15 – 627
Note that the majority of Golfs have the same rolling diameter, regardless of the wheel size.
Anyway, I digress. Back to my motor!
I decided to test the speedo last night on the way home so took the following readings;-
- 3450rpm – 120kph
- 2500rpm – 86kph
This compares with the values I got using the vwtechnic.com spreadsheet http://vwtechnic.com/transmission.htm using an ARM gearbox ratios;-
- 3450rpm – 121.8kph
- 2500rpm – 88.3kph
More to come as I have to get back to earning some money[
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