Even if the gauges were (say) 10% inaccurate, they are still indicating the fluctuating pressures.
If the reading is 50psi, in reality it could be in the 45 - 55 psi range.
Most "real" instruments are calibrated to less than 1% accuracy, but that's what you are paying for.
The biggest question here is what to do regarding the loss of oil pressure on long turns during track sessions! The gauge indicates a real time loss which cannot be good for long term engine longevity, though there has been many owner who have hundreds of hours of flat out track time.
It would be interested to here from some of them. People like Brad Roberts who has been round the block a few times with the M96/97 engines and (I suspect) has had to rebuild a few after track sessions.
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2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley.
2001 MV Agusta F4.
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