Russ & List,
It certainly cannot take that kind of HP for the dry sum pump or the
parasites. I also can't see how it could be equated to a percentage of
engine HP. The same alternator requirements for a 100 HP and 1,000 Hp
engine would be relatively the same. If there was no advantage to using
the dry sump system you could rest assured that NASCAR wouldn't use it.
I've never tested the HP requirements vs. advantages of a Winston Cup
dry sump pump but I'm sure some of guys I work with have. I'll check it
out and report back to the list with some concrete facts. My gut feeling
is that it's as I stated in an earlier post. I've pulled a good vacuum
and run up over 60 PSI on the T'Bird engine with a simple 1/4" air
drill, not much HP there.
Grib
"Do what others Won't and you'll do what others Can't for the rest of
your life"
-----Original Message-----
From: owner-land-speed@autox.team.net
[mailto:owner-land-speed@autox.team.net] On Behalf Of Russel Mack
Sent: Saturday, January 25, 2003 5:32 PM
To: Glenn Ridlen; Dave Dahlgren
Cc: rgribble; land-speed@autox.team.net
Subject: RE: Dry sump
Glenn:
looks to me like it should take about 1.5% of your total power at
9000rpm to
drive EITHER the water pump, the oil pump, or the alternator. In other
words, you should save about 1.5% of your horsepower for each one of
those
you don't use the engine to drive. For a 1000hp engine, that's only
45hp,
total.
(The percentage goes up as the RPM goes up; I should be able to save
about
2% for each "parasite" on my gixxer-- but then, that only gets me 5 or
6hp!)
The analysis I used was based on an engine with a single oil pump/ wet
sump.
When you go to dry sump, you recover all those "windage losses", by
taking
the crank out of that pool of oil. I have heard it argued by several
knowledgeable people that "what you gain in eliminating windage losses,
you
give back in parisitic pump losses, because of the added oil pumps. If
that
is true, then we should be able to account for the windage gain on an
8-cyl
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