Chamber Isolation

[gazza836]

would this not upset the thrust side of the piston (enhanced piston slap)?

----- Original Message -----
From: Roy <spectric at yahoo.com>
To: <diy_efi at diy-efi.org>
Sent: Tuesday, March 21, 2000 9:20 AM
Subject: Re: Chamber Isolation


> Hi all
>
> In reply to Mikes message:
>
> The best solution to "aerodynamics in the crankcase"
> is
> best achieved when the engine runs a dry sump
> lubrication system for the following reasons.
>
> 1) The crankshaft is not rotating in an oil bath which
>    waste power.
>
> 2) By using a 3 stage pump with a single pressure
> stage and two scavenge pumps, with a sealed
>    crankcase, you can run a partial vacuum in the
>  crankcase, just make sure that the oil tank has
> plenty of ventilation.
>
>              Roy Spectric's Ltd
>
>
> > Date: Thu, 16 Mar 2000 02:56:07
> > From: "Mike (Perth, Western Australia)"
> > <erazmus at wantree.com.au>
> > Subject: CHamber isolation ?
> >
> > Hi all,
> >
> > I notice on all engines I've worked on that
> > aerodynamics in the crankcase
> > aren't given much attention in production engines
> > (fair enough for cost),
> >
> > I have the opportunity to work on and modify the
> > crankcase on a straight
> > six (RB30ET) block and wondered if its worth trying
> > chamber isolation in
> > the crankcase.
> >
> > ie. Rather then having crankcase gases move around
> > between chambers from
> > various pistons etc, why not isolate each chamber
> > with baffles (other
> > then a small hole for oil outlet). That way on the
> > descending stroke, the
> > crankcase gets pressurised and this 'power' is
> > returned on the compression
> > cycle - or at least some of it - allowing for some
> > oil outlet through the
> > hole naturally. The overall blowby should still
> > allow the oil to exit
> > and not upset the bearings...
> >
> > In essence, each chamber in the crankcase has its
> > own oil hole(s) into
> > the main crankcase (baffle added so that each
> > chamber has its own mini
> > crankcase slightly abive the main crankcase)...
> >
> > Is this completely off beam - or do the F1 guys do
> > this sort of thing
> > at their usual 16,000 rpm engines  ?
> >
> > I'm only interested actually as its quite easy to do
> > and would make an
> > interesting experiment...
> >
> > Tah
> >
> > :) mike
> >
>
>
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