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#14567 - 02/28/05 10:03 PM Impact sensitive Fuel cutoff switch?
jcc Offline
No politics

Registered: 12/21/03
Posts: 17156
Loc: Trumussia
Any body know who makes them or who sells them? I remember seeing them a number of years ago to shut off electric fuel pumps in a hard crash. Seemed like a good/safe idea. Any comments? couldn't be much of a problem in a street car, but a race car (non drag) might be more problems then it solves?
Seeking more civil pastures

#14568 - 02/28/05 10:17 PM Re: Impact sensitive Fuel cutoff switch? [Re: jcc]
blown340 Offline

Registered: 08/25/04
Posts: 3287
Loc: Walnut Creek, CA
Ron Francis has them, and yes they are a excellent thing to have.

70 challenger convertible. 340/5 speed. blown, intercooled, efi, blah blah blah 71 valiant scamp 318/A833OD/AC/PS 00 dakota RC 4.7L 5 spd autoX'r. SRT10/T56 swap in process 73 W200 Power wagon, PTO winch, 4 spd

#14569 - 02/28/05 10:21 PM Re: Impact sensitive Fuel cutoff switch? [Re: jcc]
1_WILD_RT Offline
Management Trainee

Registered: 01/15/04
Posts: 27347
Loc: Today? Who Knows?
On Efi vehicles its called an inertia switch, typically a magnetic switch with a spring trying to seperate the contacts if its shocked hard enough it opens..generally good, but sometimes slamming a door or trunklid will open it as far as on a race vehicle if the car hooks good the violence of the launch can cause the switch to open
"The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."

#14570 - 02/28/05 10:22 PM Re: Impact sensitive Fuel cutoff switch? [Re: jcc]
topside Offline
I Live Here

Registered: 01/19/03
Posts: 12578
Loc: So Near, Yet So Far
They've been on Fords since they went to EFI, and are generally mounted in the trunk, away from the tank & electric pump; might be adaptable to an aftermarket pump.
To be honest, it's not something I've worried about; there's a switch on my dash and a master cutoff on the rear of the car per NHRA rules. But if no-one's around & your bell is really rung, an impact-switch could be a nice thing to have. I guess the thing to find out is at what impact the Ford unit activates; I can tell you that I once hit a chunk of tire on the freeway that whacked the LR wheelwell of a Ford I was driving and shut the pump off. So I think it was fairly sensitive.

#14571 - 03/01/05 05:30 AM Re: Impact sensitive Fuel cutoff switch? [Re: 1_WILD_RT]
dkn1997 Offline

Registered: 01/23/04
Posts: 2978
Loc: Coram, NY
the belt parkway in brooklyn can cause them to open, especially when going over a draw bridge. Don't ask me how I know.
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