Consider any manufacturer guides about "ideal" pressures or temperatures.
My boxster indicates stock pressures of 29F 36r.
When I put on my RA-1s, I started at 34 front and rear, knowing that 38 hot was a nice pressure from previous RA-1 experience.
So, car, tire and driver preferences all feed into determining tire pressures.
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1976 914 2.0
2000 Boxster 2.7 (sold)
1978 911 SC (sold)
1970 914 w/2056 (sold)
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