Chris, You vent the motor through the sump tank. The trick is to seal
the top half (valley) of the motor off so no oil drips down on the cam
and crank. The two ways you make more HP from a dry sump motor is
stopping the oil dripping down from the top of the engine and hitting
the crank, and keeping the crank out of the oil windage. But the most HP
gain is from the fact that you can run low tension rings because of the
low pressure in the crankcase from the scavenge lines. You can get good
diagrams of what you want from a Moroso catalog, GM Performance book
etc. I can't send pictures with this old computer I got or I would. If
you have any road race or oval track cars down there go look at them and
you can figure it out quick. Hope this helps.
just one of the dougs
Chris R Harris wrote:
>
> List, a member a few days ago asked for dry sump advice and not a lot was
> forthcoming. I'm in the same situation setting one up for the first (a
> little more expensive than a $60 conventional oil pump thats for sure).
> My specific question is: Do you still vent the crankcase through a breather
> somewhere to the atmosphere or seal it up and let the scavenge sections
> take care of this task ? I will be using a 4 stage with 2 pan and 1 valley
> scavenging.
>
> Any additional tips very welcome.
>
> Chris Harris. New Zealand.
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