[DeTomaso] Pressure cap pressure

[Doug Braun]

Asa Jay,

	You're correct about the pressure bottle's water neck depth being too long.
To test it, I used hardware store PVC fittings and hoses to plug the
bottle's openings.  I also added a Schrader valve to one of the PVC
fittings.  After pumping with a bicycle pump until I heard air leakage out
the cap, I read 10 psi at the Schrader valve.  So, I decided to take my
bottle down to the local radiator shop and have a US type neck brazed on (as
Jack DeRyke has suggested).  Now my 16 lb cap gives me 14.5 psi.

Doug

-----Original Message-----
From: detomaso-bounces at realbig.com
[mailto:detomaso-bounces at realbig.com]On Behalf Of Asa Jay Laughton
Sent: Tuesday, August 18, 2009 8:29 AM
To: detomaso at realbig.com
Subject: Re: [DeTomaso] Pressure cap pressure


But what about the depth of the water neck the cap goes on?  I can
measure the depth of the stock swirl tank as between 1/8 "and 1/4"
deeper than other water necks.  This concerns me as a 16 lb cap may not
give me 16 lb if the water neck does not have the correct depth.

Asa Jay

Asa Jay Laughton, MSgt, USAFR, Retired

& Shelley Marie
Spokane, WA

1971 Mach I Mustang  [ASA JAY]
1973 Pantera L 5533  [ASASCAT]