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Impact sensitive Fuel cutoff switch? #14567
03/01/05 01:03 AM
03/01/05 01:03 AM
Joined: Dec 2003
Posts: 22,695
Bitopia
J
jcc Offline OP
If you can't dazzle em with diamonds..
jcc  Offline OP
If you can't dazzle em with diamonds..
J

Joined: Dec 2003
Posts: 22,695
Bitopia
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?


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Re: Impact sensitive Fuel cutoff switch? [Re: jcc] #14568
03/01/05 01:17 AM
03/01/05 01:17 AM
Joined: Aug 2004
Posts: 3,310
Walnut Creek, CA
blown340 Offline
master
blown340  Offline
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Joined: Aug 2004
Posts: 3,310
Walnut Creek, CA
Ron Francis has them, and yes they are a excellent thing to have.

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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
Re: Impact sensitive Fuel cutoff switch? [Re: jcc] #14569
03/01/05 01:21 AM
03/01/05 01:21 AM
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
1_WILD_RT Offline
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1_WILD_RT  Offline
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Joined: Jan 2004
Posts: 27,347
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


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Re: Impact sensitive Fuel cutoff switch? [Re: jcc] #14570
03/01/05 01:22 AM
03/01/05 01:22 AM
Joined: Jan 2003
Posts: 20,645
So Near, Yet So Far
topside Offline
Too Many Posts
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Posts: 20,645
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.

Re: Impact sensitive Fuel cutoff switch? [Re: 1_WILD_RT] #14571
03/01/05 08:30 AM
03/01/05 08:30 AM
Joined: Jan 2004
Posts: 3,001
Coram, NY
Pool Fixer Offline
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Pool Fixer  Offline
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Joined: Jan 2004
Posts: 3,001
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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