Original Stratos stradale, Dino or 246 GT speedometer fitting to Hawk

[Rene]

Thanks Chris.

Good to hear I am not completly lost
The TB15S 270/45VR15 have 625 mm diameter, so that means around + 8% different to your tires but only - 1,5% off from the Original Alfa 195/65 x 15".
So should be 1,5 % more exact than the stock Alfa then. And there are always a built in error on the safe side of the speedlimit, that is probably why you get a accurate reading.

In Norway we drive by the speedlimit + VAT, witch is 25% and usually that is fine with the built in errors of the speedo + error at the police radar.

My concern was that the ratios inside the speedometer of the original Alfa and the original Stratos stradale, Dino or 246 GT speedometer was not the same.

What kind of speedo do you have in your car?

Regards

René

[ChrisCar6]

It's a Fiat one, don't know what from.

[Rene]

Hmmmm....

The the original Stratos stradale had a 250 km/t dial, but the most used Fiat speedo i think has 220 km/t, that was in my car too...

No one with a Veglia borletti 250 km/t dial and a Alfa V6 5 speed gearbox that can shed light on the issiue?

Regards

René

[Guy Mayers]

Hi Rene, most of the Fiat speedos I've had have a marking on the case that says 1 Giro = 1 Meter. I've currently got a 250kph speedo from a Fiat Dino Coupe in the car, attached to the Alfa gearbox and running 345s on the back. I think it's pretty accurate, pottering down the motorway and comparing it to the Sat Nav display and they're very close.
Hope that helps!

Guy

[Rene]

Thanks Guy.

Just what I needed to hear....
A strait swap then....

Regards

René

[Guy Mayers]

Hope so Rene - just sourced a 60mm Veglia Borletti speedo to replace the Dino one when I "improve" the Gp4 dash. It's TINY! The gauge has the 1 Giro to 1 Meter marking and the scale reads to 160 kmph. I've sourced a gearbox that converts this to 160mph and will get a new face to replace the existing one that reads 250kmph. Sounds complicated but it's not. The real problem I have is setting up a mechanical drive for a rev counter..... I'll get there in the end!

Cheers

Guy

[Rene]

Good luck Guy.
Will keep you posted on the swap, witch should take place in the spring, as the car will hybernate in the UK untill March / April.
No point taking her home to the salt and snow....

Have a nice weekend.

Regards

René