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6.4L Performance Parts Discussion What has or has not worked for you?

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Old 06-01-2012, 05:40 PM
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Fuel System

Since the 6.4 already has a stout fuel system would it do me any good to add an aftermarket fuel system? If so how would it help? I have been leaning towards "Fass fuel system" what do ya think
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Old 06-01-2012, 06:22 PM
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Id do a airdog if it was me and if you go bigger injectors it will help. Really it just filters it better which is a good thing to
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Old 06-02-2012, 08:41 AM
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are we talking a little more ponys, mpg or both
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Old 06-02-2012, 05:04 PM
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Just better filtration really
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Old 06-03-2012, 08:18 PM
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A FASS or Air Dog is a good thing if they provide better filtration.

Personally, I went with air mods over fuel so that I run cooler temps and don't have to worry about installing and tuning a wastegate. My personal opinion is that with stock turbos and stock fuel, air is more of limitation than fuel. If you do the Air Dog or FASS and 60 HP (15%) nozzles, you HPFP may not keep up on the hotter tunes. If the pulse width is below 2.0 with 60 HP nozzles, you will likely not have any trouble, but when you get to the 2.2-2.3 PW, it is hit or miss on whether you will be able to maintain rail pressure. If you didn't maintain RP, you could upgrade the HPFP, but the only one I know of without going to dual fillers (which is expensive) is IIH and I have heard way to many horror stories with their pump failing and causing very expensive damage.
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Old 06-04-2012, 06:03 AM
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I think either a fass or airdog is a good mod for better filtration/water seperation but i agree with B585 that air mods are more important so you have a cool running truck.
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