Thanks for those figures. Now I'm really confused though!
The car fires up so quick, it's hard to see what the oil pressure is while cranking, but it looks to be around 3psi for the second or so that the gauge was stable before rapidly rising. Once the engine starts, the oil pressure rises up to around 90. It then gradually comes down as the oil temps increase. Once the oil is up to around 60 degrees, the oil pressure on idle has dropped to around 25psi.
I've never considered this odd, because Matt Harwood and Mark (from Phoenix) fitted the gauge, and they both told me the high pressure on cold start was normal, and that it should come down (as it does) when it warms up. They set the low threshold at 15, which causes the gauge to alarm if the pressure drops below it. The oil pressure never drops below this level, unless it stalls.
Ryan G has also checked the oil pressure gauge while mapping, and commented that the values were normal.
But what I'm seeing seems totally different to what you guys are reporting for a cold idle!