Inertia Switch arrangement

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Old and Slow
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Inertia Switch arrangement

Post by Old and Slow » Mon Feb 25, 2019 8:00 pm

I'm fitting a Ford inertia switch to the Sabre Six, in the fuel pump circuit for safety, but it crossed my mind perhaps it should interrupt the ignition as well.
Any views on this?
Also, would it be a good idea to operate a relay and use the contacts to feed the ignition? What is current best practice? (See what I did there....I'll get my coat).


Philip Needham
Ashley-bodied TR3; '54 Ford Consul; '55 AC 2-Litre Saloon;'65 850 Mini; '70 Ford Zodiac MkIV; XR3i
'81 911SC Targa, '64 Sabre Six

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Inertia Switch arrangement

Post by philhoward » Mon Feb 25, 2019 8:02 pm

Stopping the fuel is both the normal and logical way of doing things. Sparks aren’t flammable..


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Inertia Switch arrangement

Post by scimjim » Mon Feb 25, 2019 8:03 pm

I’m not a fan of putting additional failure points into the ignition system either.


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Inertia Switch arrangement

Post by Roger Pennington » Mon Feb 25, 2019 8:09 pm

Does that actually give you anything extra? If you've got an engine that can continue to run when the fuel supply is cut off, then I think you should patent it quick! :D


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Inertia Switch arrangement

Post by Old and Slow » Mon Feb 25, 2019 8:17 pm

Thanks for the feedback;
I'll go with the flow, and just interrupt the fuel pumps.


Philip Needham
Ashley-bodied TR3; '54 Ford Consul; '55 AC 2-Litre Saloon;'65 850 Mini; '70 Ford Zodiac MkIV; XR3i
'81 911SC Targa, '64 Sabre Six

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