Seems the round tanks are used to get the bubbles out of the system? I
would think this aeration (making bubbles) would be a concern . . . .
David, lots of book learnin' but no practical.
----- Original Message -----
From: "Larry Mayfield" <drmayf@mayfco.com>
To: "LSR" <land-speed@autox.team.net>; "monte" <mvwolfe@aol.com>
Sent: Saturday, October 19, 2013 10:25 AM
Subject: [Land-speed] Dry Sump Tank Questions...
>I am considering the use of a dry sump system. Why? Well, the aspect of
>fire caught my attention. Ventilating the pan with a lot of oil at full
>boogie makes a big mess and even bigger fire if it gets ablaze. So, a
>smaller blaze with a small oil pan for oil collection only.
>
> If there is a link to something that can provide me with an education on
> the kinds of questions below, I sure would appreciate it! I suspect others
> would like it also!
>
> Just put your comments after the questions for me?
>
> I see there are at least two different types of tanks: round and square.
> Seems to me that a square or rectangular tank provides for more oil than a
> round one of the same basic dimension, however, there appears that there
> are more round ones than rectangular. Any idea as to why? Seems like a
> flat sided one would be easier to locate and mount.
>
>
> I have seen some in catalogs with removable tops or panels, both round and
> square and I guess that would be for removable of debris; but seems to me
> that if debris is present in the tank then the pump is probably toast.
> So, why would a LSR team need a cleanable tank like that? Looks like
> another place to leak.
>
>
> Now, does the shape of the tank have anything to do with deareating the
> oil returned from the engine sump? Is round better for getting rid of air
> in the oil? Why would that be? Does the tank need a vent? Other than the
> cap? I would guess so since air can be trapped in the oil as it goes
> though the engine and it needs a place to escape. However, if a crankcase
> vacuum system is used though, would the vent be required? Maybe a vent
> connected to the engine internally with a hose so that air pressure is
> balanced everywhere?
>
>
> Should the tank be located below the pump to prevent siphoning or draining
> back into the engine pan when the engine is off?
>
>
> For LSR type activities, are multi stage scavenge systems needed? I have
> see some with pick ups in the lifter valley, the valve covers, and the pan
> in two or more places. Are pumps driven at engine speed? Or under/over
> driven?
>
>
> Finally, pressure regulators. Since oil is incompressible, then the
> pressure regulator is also a flow regulator as well. I have an external
> NASCAR regulator on my parts shelf, but where to actually put it in the
> system? Seems to me that putting it just after the pump is draining flow
> from the engine. The "extra" oil being dumped could be put directly into
> the pan where the scavenge system would return it to the tank or actually
> plumbed to the tank directly: that seems better, but, is it? What if the
> OP regulator is at the last place to get oil? Wouldn't that be an ideal
> place because that way oil is delivered at full flow and pressure to those
> places that absolutely must have both flow and pressure: main bearings and
> rod bearings.
>
> Standing by for any and all replies, no matter what they might be! I get a
> lot of "you dumb f**k" so even those are ok.
>
> larry
>
> aka dipstick, dumb shit, idiot, no brains etc...
>
> --
> ______________________________
> drmayf
> Worlds Fastest Sunbeam, period.
> 204.913 mph flying mile
> 210.779 mph exit speed
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