XF I6 EFI fuel psi pressure vs. EB-EL EFI V8 fuel psi pressure - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
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Old 06-10-2002, 20:43   #1 (permalink)
MadMax
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Question XF I6 EFI fuel psi pressure vs. EB-EL EFI V8 fuel psi pressure

I might be worrying for nothing here, but I need to know if the XF EFI factory fuel delivery system currently has enough psi to run the 5.0 H.O. (ex 93 stang) EFI now sitting between the towers.

Driving normally seems to be OK, and when I give it a bit the power curve flattens higher up in the rev range. Its running a moderate cam & 24 lb injectors, with the standard mass air, t/body an plenum. I will trick flow it later, along with bigger mass air and T/body. The computer is ex 93 cobra.

Ive got a suspicion that it may be starving in the upper (beyond 2500 rpm) rev range.

Is there a difference between the XF EFI and EB EFI V8 fuel pressure?

Do I need to add an extra in line fuel pump and regulator?
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Old 06-10-2002, 21:54   #2 (permalink)
My name is Forrest....
 
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Its not necessarily pressure thats the problem, but flow...I know GM have a v6 and v8 pump in their tanks...both have the same pressure, but can push different amounts of fuel.
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Old 06-10-2002, 22:09   #3 (permalink)
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I think you will find you are running quite lean higher in the rev range. The XF pump flows 110l/hr compared with the EB's 135l/hr.
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Old 06-10-2002, 22:29   #4 (permalink)
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Can't help you with your problem but it sounds like a mad car!! Do you have any performance figures or photos?

I was thinking about doing it to my XF but money is bit of a prob at the moment

Cheers
matt
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Old 06-11-2002, 02:02   #5 (permalink)
MadMax
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Originally posted by EDXR8
I think you will find you are running quite lean higher in the rev range. The XF pump flows 110l/hr compared with the EB's 135l/hr.
So whats the fix? - Ive heard that an extra "in line" pump is the go...who, what and where do I get one? Also, what about the regulator - is it of any benefit in my application?
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Old 06-11-2002, 02:03   #6 (permalink)
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Originally posted by xf_xr6
Can't help you with your problem but it sounds like a mad car!! Do you have any performance figures or photos?

I was thinking about doing it to my XF but money is bit of a prob at the moment

Cheers
matt
When its completely finished I will post a pic...Its been a long road....
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Old 06-11-2002, 03:29   #7 (permalink)
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You could get the Bosch pump out of a VL for about $70. They are easy to mount and flow about 350 - 400hp depending on who you ask.
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Old 06-11-2002, 07:01   #8 (permalink)
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How much is an original Pump? I see in U.S mags they are around $100.00 U.S so $200.00 here?? Hmmm
Trouble with inline could be just as expensive and may have a restriction in the 6 fuel pump? By the way I think the Cobra run 190 L/hr.. The maf is calibrated for 19's ? It should be even though you have 24's inj..Iff the computer is a X3Z ...
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Old 06-11-2002, 16:11   #9 (permalink)
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Originally posted by ebxr8240
How much is an original Pump? I see in U.S mags they are around $100.00 U.S so $200.00 here?? Hmmm
Trouble with inline could be just as expensive and may have a restriction in the 6 fuel pump? By the way I think the Cobra run 190 L/hr.. The maf is calibrated for 19's ? It should be even though you have 24's inj..Iff the computer is a X3Z ...
True about the MAF, standard HO upper and T/BODY, calibrated for 19's, but the computer is X3Z and 24's installed, so all I have to do is get 65 - 70mm t/body & 70 maf...but seems to going fine at the moment, just worried about that fuel pressue / flow...
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Old 06-11-2002, 20:59   #10 (permalink)
Two SC 61's = trouble
 
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Try a second hand one from eb v8 on and go from there.I'd find out how much a new one is first tho..
I hope the latter model ones fit...
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