87 Carrera Speedo
 

I've owned a 1987 Carrera for about four years. The speedo registers about 10-15% high, and I assume it's adding 10-15% to my mileage on my odometer. I'm thinking it's related to the 15" wheel that came with the car. Can I replace some gear or doohickey in the speedo to get correct readings?
My passengers get this funny look when they look and see 100 mph!
Thanks, Steve

RE: 87 Carrera Speedo
 

Isn't there somebody out there that can answer this question for me?

RE: 87 Carrera Speedo
 

I replaced a set of 15" Fuchs wheels with 16" Fuchs but have not noticed any problem with my speedo calibration. I will check it out with my GPS unit next time I have the car out. As far as fixing the problem, contact one of the speed shops that specialize in repairing these units - "Palo Alto" seems to ring a bell.

I will let you know what I findwith my car.

Mick

RE: 87 Carrera Speedo
 

The 911 speedometers were naturally about 10% higher than registered speed. It was too keep you from getting in trouble. The odometer should not be affected.