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injector and fuel pump size

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Old 02-24-2006, 04:49 PM
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Mustangkiler
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Default injector and fuel pump size

ford racing 302 crate engine with the aluminum gt40x heads, ford racing gt 40 intake and a 70 mm tb and mass air flow and cai and long tube headers with flowmasters and no cats, 410 gear, tko trans, msd distributor n coil n wires and autolite platinums, what size injectors and fuel pump?
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Old 02-24-2006, 04:52 PM
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Mustangkiler
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Default RE: injector and fuel pump size

and what sizes for 75 mm tb and maf?
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Old 02-24-2006, 04:52 PM
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88BlueGT
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Default RE: injector and fuel pump size

24lb injectors will do just fine. Once you hit the 400hp mark you can look to go bigger.
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Old 02-24-2006, 04:53 PM
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Default RE: injector and fuel pump size

ORIGINAL: Mustangkiler
and what sizes for 75 mm tb and maf?
It wouldnt make a difference in your injector size but FYI a 75mm is most likely too big. I would stick with the 70mm.
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Old 02-24-2006, 04:54 PM
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gspfunk
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Default RE: injector and fuel pump size

^^^ x 2. A 155 or 190lph fuel pump should be more than enough.

Also, I would make the MAF bigger than the TB. You shouldn't need bigger than a 70mm TB w/ that combo, so go w/ a 75mm MAF.
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Old 02-25-2006, 12:17 AM
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stanglx2002
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Default RE: injector and fuel pump size

You will need 24's with that engine and a 155 fuel pump is plenty
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Old 02-25-2006, 01:09 AM
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r.barn
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Default RE: injector and fuel pump size

Depends if you want to put a blower on later......

24 without

36-42 if you're gonna upgrade later

155 pump


and I dont understand these guys when they say
a 75mm TB is too big? How can it hurt to have
as big a TB or Mass Air as possible?
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Old 02-25-2006, 01:40 AM
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Mustangkiler
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Default RE: injector and fuel pump size

ya im just asking for future reference, cuz im not sure what i want to do with my car yet, but i figure gettin sum info on here ahead of time couldnt hurt.
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Old 02-25-2006, 01:48 AM
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nitrous_bob
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Default RE: injector and fuel pump size


ORIGINAL: r.barn

and I dont understand these guys when they say
a 75mm TB is too big? How can it hurt to have
as big a TB or Mass Air as possible?

because what happens if you blow through, or suck through a straw that is 1" big as opposed to about 1/4".......??????

air velocity means WAY more than air quantity. and air turbulence hurts velocity as well.

when you lose velocity, you lose power. you only need what need and no more.

that setup would run best..the way it sits..w/ a 73 meter, 65 tb, 24 lb. inj. and a 190 pump. use an adj. fpr to knock out unneeded fuel.

probably about 34-36 psi is plenty. (that would aslo support about 400 rear wheel hp) overkill now in speculation of later mods is not good.




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Old 02-25-2006, 01:56 AM
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r.barn
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Default RE: injector and fuel pump size


ORIGINAL: nitrous_bob


ORIGINAL: r.barn

and I dont understand these guys when they say
a 75mm TB is too big? How can it hurt to have
as big a TB or Mass Air as possible?

because what happens if you blow through, or suck through a straw that is 1" big as opposed to about 1/4".......??????

air velocity means WAY more than air quantity. and air turbulence hurts velocity as well.

when you lose velocity, you lose power. you only need what need and no more.

that setup would run best..the way it sits..w/ a 73 meter, 65 tb, 24 lb. inj. and a 190 pump. use an adj. fpr to knock out unneeded fuel.

probably about 34-36 psi is plenty. (that would aslo support about 400 rear wheel hp) overkill now in speculation of later mods is not good.







Ah, OK
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