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Date:         Mon, 17 Sep 2007 19:13:17 -0700
Reply-To:     John Bange <jbange@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         John Bange <jbange@GMAIL.COM>
Subject:      Re: Rich on side, lean the other?
In-Reply-To:  <46EF1F6D.30307@gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

> > What I've asked the group twice and not gotten an answer on: three out > four times an injector fires at a closed intake valve? And the fuel pools > up or something until the valve opens and sucks it in?

It doesn't really shoot out enough to pool, and it shoots it out in a very fine spray, so it just kinda sits there floating in the air. Also, the hot intake valve and intake port surface of the head very much "encourage" gasoline to stay vaporized. This is one reason why cars "choke" the air or otherwise enrich the mixture upon cold-start-- fuel condensation. At any rate, the fuel "cloud" only has to persist for 10-12 hundredths of a second max (at idle!) before the intake valve opens and the charge is sucked in.

-- John Bange '90 Vanagon - "Geldsauger"


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