Dry circuit resistance (or carbon buildup) causes them to fail. You should
never just off a running car (or otherwise electrically loaded circuit) with
these switches. That causes an internal arc which over time builds up
resistance.
Looking at Ohms law (V=IR); low voltage / high current application are very
susceptible to small changes in resistance (think corroded battery
terminals)
I too used to buy the cheap flag style circuit breakers until it cost me a
national race win. Either get the sealed style or the FIA style Solid State
relay setup.
Kendall
-----Original Message-----
From: vintage-race-bounces@autox.team.net
[mailto:vintage-race-bounces@autox.team.net] On Behalf Of Ryan, Richard
Sent: Wednesday, January 13, 2010 12:24 PM
To: Tracy Drummond; vintage-race@autox.team.net
Subject: Re: [Vintage-race] battery Cut off with alternator
Just to chime in, we had 2 master kill switch failures in 2009, one in
an FV and one in a Miata. In both cases the driver drove the car in
after a session and parked it. Then the car would not start for the
next session.
The next one I buy will be the best one I can get.
What causes these switches to fail?
Dick Ryan 650-312-4022 (24022)
Director of Global Insurance Management
Franklin Templeton Investments
One Franklin Parkway 960/4
San Mateo CA 94403-1906
Fax 650-312-5830 (25830)
-----Original Message-----
From: vintage-race-bounces@autox.team.net
[mailto:vintage-race-bounces@autox.team.net] On Behalf Of Tracy Drummond
Sent: Wednesday, January 13, 2010 8:39 AM
To: vintage-race@autox.team.net
Subject: [Vintage-race] battery Cut off with alternator
Which brand of cut off switch is best? I need to also kill the
alternator.
I only saw this one that matches my application so far.
http://www.pegasusautoracing.com/productdetails.asp?RecID=1464
Also I am considering adding a quick fitting for battery charging but
cannot
find the grey two terminal set up.
Thanks guys
Warm Regards,
Tracy Drummond
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