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Date:         Thu, 19 Oct 2006 14:58:20 -0700
Reply-To:     Jeffrey Schwaia <jeff@VANAGONPARTS.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Jeffrey Schwaia <jeff@VANAGONPARTS.COM>
Subject:      Fuel Tank Expansion Idea
In-Reply-To:  <45293DB0.3040002@cybertrails.com>
Content-Type: text/plain; charset="iso-8859-1"

Hey all,

We were a little bored here this afternoon so we decided to do a little checking on the idea of "filling in" the valley in the 2WD Vanagon fuel tank. We had an old tank out back and an '85 Westy on the lift. Using those as samples, here's what we came up with:

Due to the clearances necessary for the shifter and the water hoses, you can only fill in about half the valley. The resulting change would net a capacity gain of about 2.25 gallons. For those of you who would like to check my math, the resulting half-cylinder (only half due to the valley) had a radius of ~3.5" and a length of ~27". Taking some liberties in rounding off, I came up with ~520 cubic inches of volume. Since one cubic foot (1728 cubic inches) has a capacity of 7.48 gallons, 520 ci would equal ~2.25 gallons.

It may also be possible to "bulge" the top of the tank to add capacity, but I'm not sure what, if any, would be the consequences on the rubber grommets, especially around the filler neck.

Have fun.

Jeff www.vanagonparts.com www.autostadtwest.com


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