<VV> electric and mechanical pumps

[corvairs at pacifier.com]

Seth - I couldn't have put it better myself. Unfortunately,  the few who
have twisted this "debate" into pretzels will not pay any more attention
to this than they have in the past. The truth is boring if it's not black
and white.

Lon Wall
www.corvairunderground.com
800-825-8247



> In a message dated 7/25/2010 11:01:51 AM Pacific Daylight Time,
> tony.underwood at cox.net writes:
>
> Sure, some mechanical fuel pumps sometimes fail.   Most of the time,
> they do not fail.
>
>
> I am not picking sides in this debate - but examine Tony's statement. How
> many Corviars are running their original Mechanical pump? What percentage?
> If
> that percentage is over 50%, then the statement is true. Now, mechanical
> pumps can fail in several other ways than leaking gas into the crankcase
> and
> could have been replaced for those reasons.
>
> The point is that mechanical pumps - just like electric pumps - can and do
> fail to work. So they will be replaced. The only reason for the
> electric/mechanical debate was the run of mechanical pumps - now many
> years back - which
> allowed failed pumps to be replaced with soon-to-fail pumps. Along with
> some questionable vendor back-and-forth posturing over the years, the
> reputation of mechanical pumps took a big hit. Along with the increased
> availability
> of electric pumps - of all kinds - and the move of new cars to exclusively
> use electric pumps, it is only natural that a competing technology would
> be
> investigated. I have run both types of pumps on my cars, indeed on the two
> Corvairs in my driveway, one has a mechanical, the other electric. There
> is
> room in the Corvair universe for both.
>
>
> PS - Tony is right about the puffing of crankcase fumes out of the fuel
> pump vent - that usually indicates engine blowby which has overwhelmed the
> PCV
> system. Be sure to check out all the tubes and hoses on the car, including
> the orifice into the air-cleaner feed tube.
>
> Seth Emerson
> San Jose, CA
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