Dry sump issue?

[DoubleD]

I have a 5 stage Peterson pump. Just recently started having a low pressure issue. When the engine is cold it runs around 45psi. At full throttle when warm it's around 80. After I race around 15 laps after the engine hAs some heat in it the pressure drops to around 10 psi during cautions or end of race. Any ideas?

[JustAddDirt]

bypass valve poppet sticking?

[fast_crew]

If problem just arrived sounds like a main bearing or cam bearing issue...or the pressure section of the pump is worn or damaged from debris..exe: rocker arm or lifter needle bearings..etc..

[SLM98]

Whats the pulley size on pump, 40 tooth?

[DoubleD]

40 tooth pulley on the pump. Oberg looks good. Is it anything to be overly concerned with? Makes me nervous when the oil light comes on

[powerslide]

Sounds like its starting to get some wear or like mentioned the pump isn't keeping up and might be damaged slightly. how many laps/races are on the motor? What are the oil temps?

[AmickRacing]

Is the idle set approximately the same? A few hundred more RPM will likely change the pressure a fair bit....