Why didn't it explode? - Page 2
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  1. #11
    Official RnS Addict fozwanger's Avatar
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    Because the fuel squirting onto the hot manifold was below the auto ignition temperature and petrol lacks the abilty to sustain self combustion unlike diesel which is a totally different fuel. It's all to do with the free / lighter hydrocarbons escaping from the surface, (that's why petrol goes off and when left standing you get that rusty coloured sludge in you tank / carbs, it's the petrol without the lighter / free hydrocarbon molecules innit) even I'm boring myself now.
    Also, due to it's below the auto ignition temp, you need a spark or naked flame to ignite the fuel.
    That's why petrol engines have spark plugs and deisel's don't.

    You can quite easily see why fuels are made conductive for the reason in the video.
    Only the fuel vapour escaping just around the nozzle was between the LEL and UEL, hence for the localised flare.
    Apologies for boring you all again

    :-)
    Last edited by fozwanger; 14-05-2009 at 14:52.

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  3. #12
    Exceeded sell by date Plumpcars's Avatar
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    Not boring...think I get that! Hence why all those times we've all adjusted Holley float levels on hot engines and got away with it!

  4. #13
    Official RnS Addict fozwanger's Avatar
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    That's about it.
    The heavier the fuel oil (and viscous) the more heavier mo;ecules it has, so they do not burn as fiercly but the burn for longer and more progressively (lorries have bags of torque as the fuel is still burning as the piston is going down) and the lighter . less viscous the fuel, the more explosive the burn (natural gas for example Gas turbines).
    I'm glad you found it interesting.

    Now back to the ironing (and I'm not joking!!!!!!!!!) just managed to get baby to sleep and missus is doing college work, how the other half live eh?
    (not the career change I was thinking of....)

    LOL

    :-P
    Last edited by fozwanger; 14-05-2009 at 16:14.

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  6. #14
    Lowlander kiwi's Avatar
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    nice one foz ! very interesting mate

  7. #15
    Off the Xmas card list kapri's Avatar
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    Re the light and heavy ends. I had this explained to me years ago by someone who worked for Esso Refinery ( about 30 miles away from here) . I've been able to impress a few people who have tried in vain to start their car after it's been stood around for 6 months or so just by dribbling abit of fresh fuel into the carb to start a reaction.

    I fell for the " but's it got fuel and a spark it must start " myself in the past until educated.

  8. #16
    Official RnS Addict fozwanger's Avatar
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    Glad to be of service (even if you suffer from insomnia, I hope you slept after reading that) it nice to draw on the generally unuseable knowledge now and then.
    Cool :-)

  9. #17
    Official RnS Addict zephyr's Avatar
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    Well, I'm reassured. Thanks for the technical input. I was ready to spend some hard-earned on a new tank to go under the pickup bed.

    Quote Originally Posted by fozwanger View Post
    Glad to be of service (even if you suffer from insomnia, I hope you slept after reading that) it nice to draw on the generally unuseable knowledge now and then.
    Cool :-)
    The Butty Run - Warwickshire breakfast meet, 1st Sunday of every month
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  10. #18
    Official RnS Addict fozwanger's Avatar
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    I'm assuming that you're just going to replace the sender and use what you already have,, then all will be well and your mind will be at ease (as will everyone elses who you try and explain this too)

  11. #19
    Official RnS Addict zephyr's Avatar
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    Kind of - I soldered the strip back together and the needles not jumping about now. I'll probably still go for a new tank at some point and put it under the pickup bed at the back as I suspect weight distribution isn't quite the perfect 50/50!

    Good subject to discuss with passengers though.
    The Butty Run - Warwickshire breakfast meet, 1st Sunday of every month
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  12. #20
    Official RnS Addict fozwanger's Avatar
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    Slder joint is fine providing it's not dry. Otherwise good result in the end

    :-)

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