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I have a big block 1970 restomod. Tremec 5 speed, etc. Considering a new fuel tank with the immersed electric fuel pump. Maybe a fuel injection unit or even a carb for now. A regulator would control PSI.
But, what happens if the car were to roll over? (heaven forbid) If the engine quits running, the mechanical pump stops pumping fuel. But if a electrical unit, wouldn't it just keep pumping fuel? Just wondering if anyone has questioned this and if there is a simple solution. Thanks for looking.
I have a big block 1970 restomod. Tremec 5 speed, etc. Considering a new fuel tank with the immersed electric fuel pump. Maybe a fuel injection unit or even a carb for now. A regulator would control PSI.
But, what happens if the car were to roll over? (heaven forbid) If the engine quits running, the mechanical pump stops pumping fuel. But if a electrical unit, wouldn't it just keep pumping fuel? Just wondering if anyone has questioned this and if there is a simple solution. Thanks for looking.
you can install a roll over switch to turn it off.
When I worked for Ford we called it an Inertia Safety Switch. It would trip the power to the fuel pump in the event of a roll over or hard enough collision. In training school we used to give them a good pop to shut the pump off when practicing different types of trouble shooting. They have a detented button that pops out when the switch is tripped and it is rest by relatching the button. Pretty simple to wire into the power or ground circuit of your fuel pump for an added measure of safety.
My Holley EFI system controls the pump. Ignition on runs the pump for a few seconds to build pressure, then turns off. Turns back on whenever the EFI sees rpm. If the engine stalls the pump stops.
Fuel roll-over -impact/inertia shut off
Thousands of them in junkyardsd and eBay.
Ford used them through the early 2000's-Mustang /Taurus/Ranger lots of them out there- very reliable and can even buy them new from several auto parts places
Just use it to break contact to the fuel pump relay. Normally closed circuit- opens when rolled or sees impact.
I mounted mine in the battery/storage compartment-
Richard has the right idea. Ford was all over this. The inertia switch is the way to go. I have it in both the Vette and the Cobra. Simple install and even in a hard collision it wil shut off fuel pump.
Thanks for teaching me what I need to know as I too am in need of one of the Inertia switches! My fuel system will not be complete until I get one installed.
Thanks for teaching me what I need to know as I too am in need of one of the Inertia switches! My fuel system will not be complete until I get one installed.
Where do you mount it on an Early C3?
Thanks for the help!
Chris
A good solid surface - vertically with the red button facing up- if it's not mounted secure you could have issues tripping it over bumps in the road.
I mounted mine in the rear storage compartment- easy access to be abe to reset AND could also be used as a safety shut off switch.
My pump is located in the tank - so it made sense to mount it in the back of the car.
Electrically- I wired it inline with the fuel pump relay trigger wire- not the actual power of the pump.
After market fuel injection question?
