[Diy_efi] Good air pump for crankcase circulation?

[Grant Beaty]

Blowing air thru it would be as easy as attaching a restrictor to a line off
the compressor, attaching that to one of the valve covers, then attaching a
hose to the other valve cover and run that to the ground.

Some people seem to think an ordinary PCV system will work fine, you just
need some kind of filter inline that will condence the vapors in a catch can
instead of in the IC, and of course allow air flow (this is what Saffo and
Lance suggested on the mkivtech list). Has anyone here experimented with
such a filter?

Thanks,
Grant Beaty

----- Original Message -----
From: "Derek" <derek_obanion at yahoo.com>
To: <diy_efi at diy-efi.org>
Sent: Friday, December 27, 2002 2:42 PM
Subject: [Diy_efi] Good air pump for crankcase circulation?


> I'm not looking for crankcase evac (pulling vacum in crankcase). I know
that
> pumps that can do this are expensive and need to use lots of current. Also
there
> is the concern that on wet sump cars (mine included), you are reducing the
very
> pressure that pushes oil into the pickup, and are reducing your oil
pressure
> with every 1" of vacumn you pull.
>
> I'm just looking for a way of sucking gases out of the crankcase, or maybe
> blowing fresh air in, to keep all the blow-by exhaust gases out and any
moisture
> I build up during my shots of methanol injection.
>
> I don't want to use a PCV system, as I'll end up coating the inside of my
> sparking clean turbo, intercooler, and intake manifold. I have yet to see
a PCV
> implementation that didn't cause build up in the motor.
>
> So basically I'm looking for a 12V air pump that uses up little current
(<5A
> hopefully), and moves a descent amount of air (3CFM or more) at low or no
> pressure differential. Low cost is a plus too. All my searches keep
leading to
> pumps which have way more than I need and cost too much.
>
>
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>



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