Re: [Classic Mustang] Low Oil Pressure Revisited

Allow me.  Ford shop manual Volume Two, Engine.  Page 21-22-27.

Oil pressure hot at 2000 RPM  50-70.  This is for a '71 Cleveland 2V, 4V or 400.

That is using 10-W40.

 

mike

 

Honest - I can quote chapter & verse from the Ford shop manual!

At 05:54 PM 6/4/2009, Simon wrote:
>good rule of thumb is 20 PSI per 1000 RPM's one thing to remember is
>that Oil pressure takes horse power, about 2hp per PSI is the figure
>I've read... May not seem like a big deal but in a performance
>application 20 extra PSI is 40 horses... So the difference between 40
>and 60 PSI at 2000 RPM's is significant. If I was running 70 PSI on a
>fully broke in engine at a steady 2000 RPM's I would run a lower weight
>oil, and if it was a street car I'd probably leave it at that, but if it
>was more performance oriented I would consider pulling the oil pump and
>blue printing it... and making sure the relief was operating correctly.

---

Dan O'Reilly
1971 Bright Red Mach 1
2002 Black Deluxe Convertible
Colorado Springs, CO

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