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yorkshire_spam

Spitfire Speedo issue

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After hibernating for a few months over winter (and getting the diff rebuilt) I took the Spitfire for a thrash over the moors to the CT P+P monthly meeting on Friday night.

The speedo starts fine.... but gets to somewhere between 20 and 30 mph and won't go any higher no matter how fast the car is actually going....

Any ideas? Speedo itself? cable? Speedo angle drive? Gearbox output?

 

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Does the odometer work normally - or does it give up at the same point?

If the odo gives up at the same point then I'd suspect slippage in the drive somewhere (drive gear, angle drive or cable).  IF the odo works normally, I reckon the problem is in the speed head itself.

Nick

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On 07/04/2018 at 10:31 PM, yorkshire_spam said:

The speedo starts fine.... but gets to somewhere between 20 and 30 mph and won't go any higher no matter how fast the car is actually going....

 

Mine has just started doing something similar, but I get to around 60mph and then starts to drop back even though road speed is increasing, lift off the gas a bit and it increases, all a bit odd. This is on a Speedo that was fully refurbed and calibrated 18 months ago, so will likely be going back....

Darren

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I've once had an issue with an angle drive where the drive stub that goes into the gearbox was spinning inside the gear in the angle drive (they are a friction fit).  This is why I asked about the odometer.

Nick

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