Water/Meth kit for increased MPG?
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Water/Meth kit for increased MPG?

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    Senior Member Bigblockbill's Avatar
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    Default Water/Meth kit for increased MPG?

    Thinking of adding a water/meth injection kit to a 6.4L powerstroke. Anyone have any experience? Any motor longevity cons? I would be doing this mostly for cooling and MPG gains, no doubt it will help cool, but anyone have any knowledge of MPG gains? Pulled a small enclosed trailer last weekend and saw about 20psi of boost at 80 mph on most of the trip. Empty it will typically run 10 psi of boost at 80. Truck is not tunned currently but should be here within the next year.
    24' Eliminator Fundeck

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    Senior Member NiceGuyEddie's Avatar
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    Quote Originally Posted by Bigblockbill View Post
    Thinking of adding a water/meth injection kit to a 6.4L powerstroke. Anyone have any experience? Any motor longevity cons? I would be doing this mostly for cooling and MPG gains, no doubt it will help cool, but anyone have any knowledge of MPG gains? Pulled a small enclosed trailer last weekend and saw about 20psi of boost at 80 mph on most of the trip. Empty it will typically run 10 psi of boost at 80. Truck is not tunned currently but should be here within the next year.
    Tune it 1st. Getting rid of that dpf exhaust system is number one!

    The performance gains are decent. The biggest thing you will notice is a big drop in EGTs. Do you have an EGT gauge now? Tune it and put gauges in the truck before you do anything else. The only real drawl backs to the kit are having to fill the tank all the time (if you drive it often) and loosing bed space for the tank. I've seen some mount them in tool boxes or up against the frame rail with a custom fill neck into the bed.

    Damn no wonder why those Fords burn so much fuel! 20psi at 80pmh on flat ground is a lot, even towing. Was that average psi or only up grades? My truck is lifted on tall tires. I was towing about 8000lbs on my last Glaims trip and wasn't seeing boost levels that high.
    Last edited by NiceGuyEddie; 09-17-2012 at 11:17 PM.

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    Senior Member Bigblockbill's Avatar
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    I have been wanting to tune the truck since day one but have been afraid of doing it and risking voiding the warrenty. I don't drive it much and in fact it is an 08 with only 16K miles on it. I still have about a year left on the warrenty so will probably tune it next summer if I can wait that long. There is no gague or anything on it now so I have no idea where it is. It seem like that the 20 psi at 80 with a small enclosed trailer was on mostly flat ground... maybe there was a bit of a head wind, but ya, I only got 10 mpg coming home from the lake. It was getting 13 average until one of the great flashes from Ford now averages 12 empty at 70 mph on the highway. Of course I knew it was going to be bad when I bought the truck so I can not bitch to much, but would like to bump it up some.
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    Senior Member NiceGuyEddie's Avatar
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    Quote Originally Posted by Bigblockbill View Post
    I have been wanting to tune the truck since day one but have been afraid of doing it and risking voiding the warrenty. I don't drive it much and in fact it is an 08 with only 16K miles on it. I still have about a year left on the warrenty so will probably tune it next summer if I can wait that long. There is no gague or anything on it now so I have no idea where it is. It seem like that the 20 psi at 80 with a small enclosed trailer was on mostly flat ground... maybe there was a bit of a head wind, but ya, I only got 10 mpg coming home from the lake. It was getting 13 average until one of the great flashes from Ford now averages 12 empty at 70 mph on the highway. Of course I knew it was going to be bad when I bought the truck so I can not bitch to much, but would like to bump it up some.

    I understand your warranty concerns. I just did it. I figure, I'm paying for the damn thing so I may as well enjoy it the way I want to and take the risk.

    When I pull 8k pounds (remember, my truck is lifted), my truck gets about 14-15mpg.

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    Senior Member dankdave79's Avatar
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    Gonna sell my 6.4 soon I have a complete delete exhaust and sct tuner with innovative tunes I would sell

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