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01-30-2005, 11:53 PM | #1 |
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fuel system for 400-450hp
I plan on tuning my car for a conservative 400-450hp once the blower is hooked up. Will the stock fuel lines and fuel rails support this amount of horsepower, considering the fuel will be fighting about 10lbs of pressure inside the intake manifold? I currently have a 255 pump and an adjustable fuel pressure regulator that is boost sensitive. The car is a road course car, so reliability and consistency are crucial. I will NOT be using an FMU. I plan on using 42lb injectors as well.
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01-31-2005, 11:17 AM | #2 |
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Re: fuel system for 400-450hp
I`m detunned to 480 rwhp until my lines and rails are changed out by my speed shop. I would think you would be fine , im not sure what there rated for though.
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1969 Mach 1 351C with a c6(for now) Sold 92 Rag Top GT Procharged & intercooled DSS 331 LC Holley Systemax 2 Intake, Edelbrock RPM Heads,E 303 ,blow thru air meter, race bypass, 42 pph injectors,65mm tb,1.7 rr, Mac long tube headers w/off road H pipe, Force 2 catback, TKO,Pro 5.0, K&N, Alum DS,3 core radiator, subframe connectors,3.73`s, Nitto DR`s and a Heavy Foot. |
01-31-2005, 03:00 PM | #3 |
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Re: fuel system for 400-450hp
What about injectors? I currently have 30lb injectors with a 255 pump. Will I be able to push enough fuel pressure in order to keep the motor in a good air/fuel range?
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02-01-2005, 08:58 AM | #4 |
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Re: fuel system for 400-450hp
I would stick with using the 42`s and no fmu myself.
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1969 Mach 1 351C with a c6(for now) Sold 92 Rag Top GT Procharged & intercooled DSS 331 LC Holley Systemax 2 Intake, Edelbrock RPM Heads,E 303 ,blow thru air meter, race bypass, 42 pph injectors,65mm tb,1.7 rr, Mac long tube headers w/off road H pipe, Force 2 catback, TKO,Pro 5.0, K&N, Alum DS,3 core radiator, subframe connectors,3.73`s, Nitto DR`s and a Heavy Foot. |
02-01-2005, 03:35 PM | #5 |
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Join Date: Jan 1999
Location: Shaler, PA
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Re: fuel system for 400-450hp
You'll be fine with the stock lines and rails. I agree with 42's and the 255lph pump.
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~Dan 2001 SVT Lightning 89' GT : Taking up garage space and waiting for a buyer... Rice Hater's Club - Member #11 |
02-01-2005, 09:47 PM | #6 |
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Re: fuel system for 400-450hp
I run 500rwhp with a 255 and 42# and no FMU (just custom chip).
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Darius Rudis, Moderator Corner Carvers Delight 1989 Mustang LX - Open Track Car http://www.dariusrudis.com |
02-02-2005, 03:17 AM | #7 |
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Re: fuel system for 400-450hp
508rwhp on stock rails and 38# inj. with a 255lph in tank and a T-rex inline. No problems.
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1987 Saleen #0197 restored. Dyno Sheet Saleen/Vortech intake lower ported. Edelbrock heads, Cobra 1.7RR, B303 cam, mac 1 5/8 shorties unequals offroad H pipe, 2chamber flowmasters, Pro M-80 maf, MAC 70TB, 38# inj. Vortech S-trim. 3.12" and 6.87" pulleys, Unlimted Performance PowerPipe. FRPP harmonic Balancer and spacer. Tremec TKO and SPEC stage 4 clutch, Steeda Tri-Ax shifter. 508.2rwhp / 465rwtq SAE corrected, with 14# of boost. |
02-02-2005, 05:21 PM | #8 |
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Re: fuel system for 400-450hp
My fear is that with 42lb injectors, and only putting down about 425 to the wheels, that I will have to turn the fuel pressure down too much. I was personally certain of my stock fuel rails and lines, but just wanted some outside confirmation.
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02-03-2005, 12:00 AM | #9 |
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Re: fuel system for 400-450hp
how do u turn down your fuel pressure ?
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02-03-2005, 06:08 PM | #10 |
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Re: fuel system for 400-450hp
With an adjustable fuel pressure regulator.
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