fuel pressure help

car9fan · 04-24-2004, 06:53 AM

on my 69 302 when i make a 1/4 mile run the fuel pressure drops,when driving at 55 mph its at 5/6 but when i shift into high gear it drops when i go thought the traps it at 2 1/2 to 3 pounds is that ok . it runs 12.80 @106 thanks car9fan

88workcar · 04-24-2004, 07:14 AM

I would say that is not an utter emergency, but when the funds allow it, get a bigger pump. I an not big on carb info but it seems that it would be better to matain the pressure throughout the 1/4.

GhOsT6_9 · 04-24-2004, 01:41 PM

I have to agree. If your pressure is dropping while stompin on the gas then you need a higher volume pump.

Just make sure that you don't lean the motor out too much, or else you're gonna need more then a new fuel pump

car9fan · 04-25-2004, 06:27 AM

thanks for the info iam getting a holley blue pump with a regulator car9fan

04-24-2004, 06:53 AM	#1
car9fan CAR9FAN Join Date: Mar 2004 Location: m.d Posts: 103	fuel pressure help on my 69 302 when i make a 1/4 mile run the fuel pressure drops,when driving at 55 mph its at 5/6 but when i shift into high gear it drops when i go thought the traps it at 2 1/2 to 3 pounds is that ok . it runs 12.80 @106 thanks car9fan __________________ MY HOME PAGE

04-24-2004, 07:14 AM	#2
88workcar Registered Member Join Date: Oct 1999 Location: Pierre Part, La. U.S.A. Posts: 1,850	I would say that is not an utter emergency, but when the funds allow it, get a bigger pump. I an not big on carb info but it seems that it would be better to matain the pressure throughout the 1/4. __________________ 88workcar 1988 Mustang LX 342. 417rwhp @ 6800. 28 X 10 ET Drag, 4.30s, 10.69 @ 126.43 1.42 60ft. 11.13 @ 127.7 on BFGs 1.72 60ft Rice Hater # 42 To be old and wise, You must first be young and stupid I'm somewhere in tthe middle.

04-24-2004, 01:41 PM	#3
GhOsT6_9 Registered Member Join Date: May 2000 Location: Ontario,Canada Posts: 233	I have to agree. If your pressure is dropping while stompin on the gas then you need a higher volume pump. Just make sure that you don't lean the motor out too much, or else you're gonna need more then a new fuel pump __________________ 1989 Mustang LX Notch 5.0L, T-5, 1969 351W heads, cut & welded stock plenum, F-303 cam, Mac 1 5/8 full length headers, Cat'd H-pipe, 3.73 gears, Underdrives, SSM lift bars, E-Fan, 3G Alt, Custom Chip, Autometer gauges, Weld Draglite wheels , M/T ET Street Radials Best 1/4: 13.33@101.53MPH

04-25-2004, 06:27 AM	#4
car9fan CAR9FAN Join Date: Mar 2004 Location: m.d Posts: 103	fuel pressure thanks for the info iam getting a holley blue pump with a regulator car9fan __________________ MY HOME PAGE

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