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Re: Remove second gas tank on '70?

To: "Gary McCormick" <svgkm@halley.ca.essd.northgrum.com>,
Subject: Re: Remove second gas tank on '70?
From: "datsunmike" <datsunmike@nyc.rr.com>
Date: Fri, 4 May 2001 16:20:36 -0400
Talk about "Shit Happens," wow, that's horrible.

Mike

----- Original Message -----
From: "Gary McCormick" <svgkm@halley.ca.essd.northgrum.com>
To: "Ronnie Day" <ronday@home.com>
Cc: "Adam Bradley" <ambradley@yahoo.com>; "Patrick J. Horne"
<horne@cs.utexas.edu>; "datsun" <datsun-roadsters@autox.team.net>
Sent: Friday, May 04, 2001 12:33 PM
Subject: Re: Remove second gas tank on '70?


> A pressurized gas tank can be a very bad thing. My old BMW 3.0Si burned to
the ground (a
> year after I sold it, thank goodness) because the fuel tank was
pressurizing. The NO (next
> owner) noticed a trail of liquid behind the car, stopped, got out and
removed the gas cap
> (where the drip was coming from) and fuel gushed out, ran forward under
the car and
> ignited when the vapors contacted the hot exhaust manifold. Bad thing to
happen to any
> car, but I'd /really/ hate to see it happen to a Roadster.
>
> Gary McCormick
> '70 2000 Hangar Queen
> San Jose, Ca
>
> Ronnie Day wrote:
>
> > >Yes, that's what I mean.  I realize it isn't filled directly but some
> > >gasoline can make its way into that tank via expansion, or so I've been
> > >told.  It's taking prime real estate in the trunk, and since I plan to
> > >remove the smog pump, I'm not too concerned about remaining stock.
> > >
> > >Anyone know the answer?
> >
> > As mentioned it's part of the fuel vapor recovery system. This takes the
> > place of the older style straight vents to the outside air. Carb setup,
> > fuel delivery and some other things depend on proper functioning of the
> > entire system. I've seen other cars with this removed that then tend to
> > pressurize the gas tank due to heating and lack on venting which  forces
> > gas past the needles and seats in the carbs.
> >
> > I would strongly suggest not messing with it. I look at it as something
> > like the PCV valve. Both are passive devices that cost no horsepower to
> > leave operating and removing them properly requires a whole new set of
> > adjustments and fixes.
> >
> > Bill Kenyon can probably give a more definitive answer.
> >
> > FWIW, Ron
> >
> > The ACL Group
> > Arlington, Texas
> > (817) 572-0873
> > ronday@home.com
> > ronnie_day@acd.org

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