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Date:         Sun, 3 Jul 2011 16:32:53 -0400
Reply-To:     David Beierl <dbeierl@ATTGLOBAL.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Beierl <dbeierl@ATTGLOBAL.NET>
Subject:      Re: Fireworks for the Fourth-in my engine bay
Comments: To: Scott Daniel - Turbovans <scottdaniel@turbovans.com>
In-Reply-To:  <0fb901cc39bb$b74b8870$6401a8c0@PROSPERITY>
Content-Type: text/plain; charset="us-ascii"; format=flowed

At 03:59 PM 7/3/2011, Scott Daniel - Turbovans wrote: >this is really 'rich' ! > >re >"the difference between atmospheric pressure and >full regulated line pressure is maybe a teaspoonful " > >How can you talk about a pressure difference, and then use a volume >measurement in your explanation ?

I should have said "the volume difference..." The lines swell up under pressure and hold another teaspoonful or so.

>That is not so kosher for such a geek tech guy. > >if your point is that it barely takes any pre-running of the fuel >pump to charge the lines.. >say that. >and we are not talking about 'pressure' .. >we are talking about liquid gas in the lines first, or that's what I >am talking about.

Yes, that's true if you're starting with empty lines, not just with no pressure.

If there's ten feet of 6 mm hose in the system that's a volume of about 85 cc, or about five seconds run on the pump to fill one time.

>so maybe no pre-runs of the pump is enough. >or maybe only one is.

Since the pump runs continuously as soon as you start cranking I don't think it makes a material difference whether you do any at all. However it's conceivable that a certain amount of air might be trapped in injectors and have to be worked out through the injector nozzle.

Yours, David


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