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Well call me crazy, but I use the Melling HV and I open it up and round off some passage, enlarge the exit, ...generally use my head to improve flow. I also replace the spring for a higher pressure relief one.

I'm sure I'm wasting HP, but my engine is still together and doing just fine. Deeper pan, and I've never run out of oil due to the extra volume pump.

45psi hot at idle .....75psi top end WOT. 1000's and 1000's of street miles, and 100's of WOT runs.

Same pressures I'm getting. 8 Qt Milodon pan, so I'm not running out of oil - still got big pressure in the lights. Just thought the pressures were a little excessive for my needs.

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