[Diy_efi] Good air pump for crankcase circulation?

[Shannen Durphey]

A crankcase vent can be created by making a venturi in the headers.
Shannen

Derek wrote:
> 
> 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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