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Old 03-24-2010, 03:17 PM
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Question harpoon mod ?

I got a stupid ? can you do do the harpoon mod without dropping the tank? Was thinking about just taking the bed off. can it be done?
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Old 03-24-2010, 03:36 PM
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If your taking the bed off i cant see why not
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Old 03-24-2010, 05:38 PM
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ditto I dont see why you couldnt. How much more fuel do you get to put in your tank by doing this?
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Old 03-24-2010, 05:43 PM
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You can do it if the bed is off.
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Old 03-24-2010, 06:00 PM
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Quote:
Originally Posted by CCSBD View Post
ditto I dont see why you couldnt. How much more fuel do you get to put in your tank by doing this?
None, but then you don't have to squeeze the last 5 or 6 gallons in.
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Old 03-24-2010, 06:03 PM
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i'm a powerstroke rookie.... whats the harpoon mod?
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Old 03-25-2010, 03:36 AM
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Originally Posted by Eagle 33 View Post
i'm a powerstroke rookie.... whats the harpoon mod?
Harpoon Mod
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Old 03-25-2010, 07:01 AM
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but what is it? what does it actually allow?
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Old 03-25-2010, 07:09 AM
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I was told to lift the bed, but I tried, and i had ONE bolt that I broke two torx bits trying to remove. I soaked it in rust penetrant and everything. I bolted the bad back down
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Old 03-25-2010, 07:25 AM
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Originally Posted by Eagle 33 View Post
but what is it? what does it actually allow?
From my understanding, the breather tube in the filler neck allows air to go out of the tank as the fuel fills. With the end of the breather tube longer, the air quits coming up the tube when the fuel covers the end of it. This makes putting more fuel in more time consuming because the filler neck then fills with fuel clicking off the pump nozzle. Because diesel foams, it takes a bit for the foam to subside allowing more fuel into the tank. Many people don't want to wait for this pump-the-neck-full-wait-for-the-foam-to-go-down-put-more-fuel-in process, driving away with less fuel in the tank.

By shortening the tube, it allows more fuel to flow into the tank before the end of the tube gets covered. This results in having more fuel in the tank when you drive away.

That's how I figure it - Some one else may come along to confirm or correct that theory.
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