Oil pressure @ performance?

[Pvt Parts]

Originally Posted by Alan Roehrich

Bub,
I understand that. What I'm saying is, the best way to get some idea of what gain can be had, without taking everything apart and spending a fair amount of time, is to try a really light weight oil.

Sure, the difference in friction between the oils will have an effect, but not as much of an effect as the reduction in HP spent turning the pump.

Once he sees what using the lighter oil will do, then he can look at what he needs to do to run lower oil pressure without risking damage. He'll probably gain even more power, and be pleasantly surprised.

Triple XXX Correcto !!!! Doing that reduces the HP necessary to turn the pump and the improvement in lubrication reduces the parasitic drag. And your forgot to mention that with improved lubrication, you can probably get by with less oil in the pan thereby reducing windage.
Unless he's saying he has those pressures with 0 wt oil now. In that case, take it apart.

[rod]

in the newest Car Craft mag, in the 'ask anything' Q&A section there is a letter/answer about just this very thing. also there is a reference to a previous oil pump test.
even a 1 horse change in a 283 will make a difference whereas a 1 horse change in a 427 is almost unnoticed, speaking percent wise.
rod in AZ

[Myron Piatek]

When I change from straight weight 30-40w conventional race oil used for break in to synthetic Amsoil 5w-20 Dominator, not only does my oil pressure drop, I have to turn down the idle rpm!
I forgot the exact #'s on both, but it's obvious and gets your attention.