[Diy_efi] Re: Diy_efi digest, Vol 1 #462 - 14 msgs

[Bill Washington]

Derek,
    What about a small centrifigal blower driven off your fan belt? - 
absolute power loss from the engine would be less since you would then 
only have the power consumed by the fan and the mechanical losses from 
the belt/pulley. An electric fan has that plus the losses in the 
Alternator and the losses in the electric motor, neither of which are 
very efficient.

Regards
Bill W

diy_efi-request at diy-efi.org wrote:

From: "Derek" <derek_obanion at yahoo.com>
>To: <diy_efi at diy-efi.org>
>Date: Fri, 27 Dec 2002 13:42:04 -0800
>Subject: [Diy_efi] Good air pump for crankcase circulation?
>Reply-To: diy_efi at diy-efi.org
>
>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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