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On Mon, Sep 21, 2015 at 7:18 PM, Chris Kantarjiev <cak@dimebank.com> wrote:
> One of the famous Mark Donohue "Unfair Advantage" stories is about looking
> for extra power from a flat-12 Ferrari racing engine, maybe this is the
> Sunoco 512. One of the things they found when they were looking for extra
> horsepower was that the oil pressure was very high - I'm remembering 100
> psi - and that turning it down got them significant horsepower.
>
> It's from there, and from Carroll Smith, that I have the rule of thumb
> that 10psi/1000rpm is *plenty* of oil pressure; much more than that is just
> wasting power.
>
I'm no Mark Donohue, but I suspect that somewhat higher oil pressure may
lead to somewhat longer engine life.
Jeff Scarbrough
Corrosion Acres, Ga.
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<div dir=3D"ltr"><br><div class=3D"gmail_extra"><br><div class=3D"gmail_quo=
te">On Mon, Sep 21, 2015 at 7:18 PM, Chris Kantarjiev <span dir=3D"ltr"><=
;<a href=3D"mailto:cak@dimebank.com"; target=3D"_blank">cak@dimebank.com</a>=
></span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0=
0 .8ex;border-left:1px #ccc solid;padding-left:1ex">One of the famous Mark=
Donohue "Unfair Advantage" stories is about looking for extra po=
wer from a flat-12 Ferrari racing engine, maybe this is the Sunoco 512. One=
of the things they found when they were looking for extra horsepower was t=
hat the oil pressure was very high - I'm remembering 100 psi - and that=
turning it down got them significant horsepower.<br>
<br>
It's from there, and from Carroll Smith, that I have the rule of thumb =
that 10psi/1000rpm is *plenty* of oil pressure; much more than that is just=
wasting power.<div class=3D"HOEnZb"><div class=3D"h5"></div></div></blockq=
uote></div><br></div><div class=3D"gmail_extra"><br></div><div class=3D"gma=
il_extra">I'm no Mark Donohue, but I suspect that somewhat higher oil p=
ressure may lead to somewhat longer engine life. =C2=A0 =C2=A0</div><div cl=
ass=3D"gmail_extra"><br></div><div class=3D"gmail_extra">Jeff Scarbrough</d=
iv><div class=3D"gmail_extra">Corrosion Acres, Ga.</div></div>
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