Just as safe as the inertia switch is using the three terminal oil
pressure switch used on some of the late model LBCs.
If you rig a relay to control the fuel pump power...and the 'floating'
switch contacts of the oil pressure switch to control the relay...
if in an accident ...when the engine stops, the drop in oil pressure
will shut of the fuel pump.
Another advantage to this is the fuel pump isn't supplied power (+12V)
until oil pressure has built up before starting the engine. The engine will
usually
start with what's in the float bowls without much problem. But if the
oil pressure doesn't come up right away it'll shut down. Since the switch
is usually in the order of 2-5 psi to activate, cranking will build enough
pressure to activate the system.
(It's been working fine on my '73 BGT for years now)
Paul Tegler wizardz@toad.net http://www.teglerizer.com
----- Original Message -----
From: "Erik Quackenbush" <erik@midwestfilter.com>
To: <triumphs@autox.team.net>
Sent: Wednesday, November 01, 2000 10:58 AM
Subject: Re: Inertial Fuel Cutoff Switch
You can still buy the original fuel cutoff switch that was supplied with
the TR-5 and TR-6 PI from TRF and Rimmer (I think Moss sells a modern
generic switch which is probably better if originality isn't important).
The Roadster Factory even had the original firewall mounting clips in stock
during the Summer Party.
Note that my first switch of this type melted in the ON position. I had a
low resistance short somewhere in the wiring to my Bosch fuel pump and it
was enough to fry the switch without blowing the fuse. Obviously I should
have used a smaller fuse but I needed to get the car home to fix the
problem and the little ones kept blowing. ;{) (duh).
-Erik
--
Erik Quackenbush, V.P. Operations, Midwest Filter Corporation
1-847-680-0566 fax: 1-847-680-0832 http://www.midwestfilter.com
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