[Diy_efi] Good air pump for crankcase circulation?

[Derek]

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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