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walbro 450 and fuel line return questions

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Old Jul 14, 2015 | 09:36 AM
  #1  
BoosttedEVOx's Avatar
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From: Long Island, NY
walbro 450 and fuel line return questions

I been searching up and down and am stumped on what route to go with.
2014 evo x - going to get dual map tuned on saturday - doing a 93 and e85 map
mods are: ams downpipe , speed circuit test pipe, summit racing 3in electric cutout, 3 inch cat back exhaust, grimm speed 3 port, k&n typhoon kit intake kit with uicp , ets 3inch fmic, ets licp

parts to install before tune: id 1000 injectors, walbro 450 with blaq ops kit, and zeitronix ethanol analyzer guage

trying to make at least 400hp


** I was going to hard wire my fuel pump but am having second thoughts on hard wiring it. i am still on a stock fuel rail and do not have a aftermarket FPR.

Should i hard wire it or not?

also was reading on a fuel return problem with the 450 pumps and how a lot of pressure is created in the return line and that the housing needs to be modified but have also read that it is not needed to modifying it.


if any one can give me some advice that would be great thanks
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Old Jul 29, 2015 | 08:34 PM
  #2  
the 10th 1dr's Avatar
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Any response to this one?
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Old Aug 1, 2015 | 09:24 PM
  #3  
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How did the 450 fit in your tank?
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Old Aug 8, 2015 | 02:00 AM
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Just curious why you chose to go with such a high-flowing pump for a setup that will make less than 400HP? I would think a significant chance exists that it will outflow your stock FPR at idle, so I would leave the stock wiring alone.

Now that we are on that subject, what kind of fuel pump speed control to the Xs have? Is it just a resistor/relay combo, or does it have some sort of special 2-speed power supply?
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