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Old 03-02-2014, 08:09 PM   #21
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*prepares flamesuit* You could use an FMU to add fuel pressure while under boost, its an old skool way of doing it but if you want to go pure junkyard and save money its what i would do.
You cannot use a FMU on a returnless fuel system

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Old 03-02-2014, 08:12 PM   #22
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The fmu eliminates the need for tuning and is good for low boost, you cant just toss in bigger injectors you would still need a tune for those.

*edit* im surpised no one has corrected me yet, turns out the focus has a 'returnless' fuel system so an fmu cannot be used.
The FMU NEVER elimintated the need for a tune , it just closed off the return fuel line and made more fuel psi , it was lack luster at best and did nothing for the load correction or timing issues or any of the other things needed for adding boost

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Old 03-02-2014, 08:26 PM   #23
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The FMU NEVER elimintated the need for a tune , it just closed off the return fuel line and made more fuel psi , it was lack luster at best and did nothing for the load correction or timing issues or any of the other things needed for adding boost

Tom
You can use one of those msd timing retard boxes, but this would be a very crude way and isnt near as good as doing it with a tune.
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Old 03-02-2014, 11:14 PM   #24
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Tune it is then. Is a fuel pump completely necessary for 5psi?
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Old 03-02-2014, 11:14 PM   #25
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No! Ur fuel pump is great for a while
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Old 03-02-2014, 11:15 PM   #26
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So injectors are the only only thing motor wise?
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Old 03-02-2014, 11:19 PM   #27
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Ya and depending on how far ur planning on taking ur car 42lb injectors should be fine i took my 42lbs all the way to 350 crank hp
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Old 03-02-2014, 11:19 PM   #28
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Besides the obvious header, turbo, piping, oil lines. Speaking of oil lines, where does the inlet oil line come from?
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Old 03-02-2014, 11:20 PM   #29
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I'm shooting for 200. I'm sure when I get there I'll want more though.
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Old 03-02-2014, 11:20 PM   #30
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Theres a bunch of ways to doing it it comes down to pretty much preference or what u feel like doing
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