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 Post subject: Fuel tank
PostPosted: Tue Nov 17, 2020 1:08 am 
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EFI Slant 6

Joined: Wed Jan 14, 2004 9:36 pm
Posts: 341
Car Model:
Why won't the fuel ignite when a current is passed through the resister of the fuel guage sender?

I have assumed this is how the sender works.


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 Post subject: Re: Fuel tank
PostPosted: Tue Nov 17, 2020 1:27 am 
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Supercharged

Joined: Thu May 12, 2005 11:50 pm
Posts: 6171
Location: So California
Car Model: 64 Plymouth Valiant
No spark.

Not hot enough.

_________________
Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

8)


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 Post subject: Re: Fuel tank
PostPosted: Tue Nov 17, 2020 1:33 am 
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EFI Slant 6

Joined: Wed Jan 14, 2004 9:36 pm
Posts: 341
Car Model:
I thought so too, but was not sure.


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 Post subject: Re: Fuel tank
PostPosted: Tue Nov 17, 2020 3:34 am 
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SL6 Racer & Moderator
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Joined: Sat Oct 19, 2002 12:06 pm
Posts: 7492
Location: Silver Springs, Fl.
Car Model:
No oxygen in the tank. It is displaced by fuel liquid/vapor.
PS: Liquid gasoline is not flammable, only the vapor.

_________________
Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 225 nitrous
64 Valiant Signet
64 Valiant 4dr 170


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 Post subject: Re: Fuel tank
PostPosted: Wed Nov 18, 2020 12:49 am 
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EFI Slant 6

Joined: Wed Jan 14, 2004 9:36 pm
Posts: 341
Car Model:
I did not know liquid gasoline was not flammable.

Thanks


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 Post subject: Re: Fuel tank
PostPosted: Wed Nov 18, 2020 4:43 am 
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Board Sponsor
User avatar

Joined: Fri Nov 01, 2002 5:02 pm
Posts: 1735
Location: Waterloo, Iowa
Car Model: '23 T-bucket
It's true. There have been (very uncommon) instances of a smoker throwing a cigarette butt into gasoline without an expected ignition. If one can get it through the fumes, then the fluid will douse it.
However, the flash point of gasoline, and even the vapor point, is so low that gasoline is considered one of the most hazardous fluids on the planet. (Notwithstanding corrosives and biologicals.)
Shoot, even at 0*F, gasoline is still "out-gassing", or evaporating. (I would have to do some research to find the actual numbers for such info.)

NO! Don't try that at home. :mrgreen:

Roger


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 Post subject: Re: Fuel tank
PostPosted: Wed Nov 18, 2020 6:25 am 
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SL6 Racer & Moderator
User avatar

Joined: Sat Oct 19, 2002 12:06 pm
Posts: 7492
Location: Silver Springs, Fl.
Car Model:
Now about the flash point: gasoline placed in an open bin has a flammable vapour above the surface when temperature of the liquid is – 23 °C (-9.4 f). You can imagine a cloud of gasoline vapour hanging above the surface of the liquid. When a spark or flame hits the vapour, it ignites.

_________________
Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 225 nitrous
64 Valiant Signet
64 Valiant 4dr 170


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 Post subject: Re: Fuel tank
PostPosted: Thu Nov 19, 2020 7:36 am 
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EFI Slant 6
User avatar

Joined: Sat Jun 09, 2007 7:20 am
Posts: 273
Location: Portland, Or.
Car Model: '64 Valiant Convertible
My favorite gasoline vapor example.....

https://www.youtube.com/watch?v=UH4Hw9s8OAM

Enjoy the show!


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 Post subject: Re: Fuel tank
PostPosted: Fri Nov 20, 2020 2:09 am 
Offline
EFI Slant 6

Joined: Wed Jan 14, 2004 9:36 pm
Posts: 341
Car Model:
What a d head.

I am glad I raised this as a topic.

Thanks for your responses.


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