Hi everyone, I’m new to Ferrari ownership. I have a 355 with speedo in KHM. Replacement to a MPH speedo looks pretty straight forward - change old with new while matching the mileage in conversion. There are some threads that speak to 348 and 360s but couldn’t locate one for 355s. Is there anything else that needs to be addressed with computer or sensors? It’s just seems too easy to make this change. Appreciate the insight. Sent from my iPhone using FerrariChat.com mobile app
Playing devils advocate here, but why not keep it as is? I've got a Euro spec mondial and its not that hard to learn/adjust to speed/traffic. When you go to sell and you have a non US spec car with a now US spec speedo mileage and documentation of the conversion may become an issue. As picky as some buyers can be why invite possible future issues?
That’s a good point. I hadn’t thought about that. However, I have zero intention on selling. I know I may be new to owning but not new to loving it. Grew up as my ideal car. Finally have my dream. Going into the ground in it. Sent from my iPhone using FerrariChat.com mobile app
+1 Can the local annual inspection system cope with a km to mph change or will it throw up a red flag when the odometer value goes down? Has it already been registered on US soil? Other than that, I don't see a problem. The sensor and other electrics are the same (with respect to the speedo).
1) Not registered in US yet. 2) DOTs have different but similar protocols. Basically if the paperwork is filed correctly there will be no issue on conversion (I’ve checked with state motor department). I was more curious as to the technical end of the business. Removal of one pod for another in updated gauge with correct conversion just seemed too simple without onboard computers and sensors being involved. Sent from my iPhone using FerrariChat.com mobile app
Yeah, the F355 pre-dates the programmable/multiplexed nonsense for instrumentation. The input is the same to the speedo, as is the output from the speedo. The speedo has an internal circuit which halves the frequency of the sensor signal and sends it on to other computers (engine ECU/s, F1 TCU if applicable, and suspension ECU).
I am so glad to hear you love your car to take to the grave- I am doing the same. I will add one more thing... You have a euro car in the US. There is something cool about that, period! Keep the speedo in KPH! The die hard Ferrari people will go nuts to see it.
