Fuel Lines and Tanks - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BigDan3131 · 10-07-2011, 07:54 PM

I was just wondering if I went to overboard on my fuel system and what you guys are using compared to it. Engine size and horsepower figures added please.

I have a an aluminum fuel cell holding 20 gallons and with it I used both outlets. I have -10 coming from the cell to my Mallory 250 filter and both outlets have -10 going into my Holley Billet 160 pump. From the pump I have a -8 line running to the regulator splitting into -6's to the carb. Im not so sure how power I'm making but when I did race it just to find out how fast it could go I ran 11.83 at 126 mph in the quarter. That's in my ElCo with a weight including me of 3550 pounds.

cableguy0 · 10-07-2011, 08:02 PM

A single line -8 would have been plenty. Why the two feed lines to the pump? The pump to the motor sounds perfectly fine. Keep in mind -8 line is 1/2 inch inside diameter and -10 is 5/8's inside diameter. -10 line can feed 1000 plus hp.

mightymouse · 10-07-2011, 09:53 PM

i got -10 from tank to pump to regulator -8 return to tank,,,, -6 to quick-fuel 850- 355 ci. solid-roller, super vic, trans brake, 430 gears plan on juicing it . if its to much the regulator has a return,,,room to grow

fastwillie 696969 · 10-07-2011, 10:30 PM

i went -8 all the way to the carbs it had a -6 poor thing was starving

Marv D · 10-07-2011, 10:48 PM

I have the Mallory Comp filter too Dan,, did it the same way but with two 8's to the filter, -8 to a Mallory 250 alcohol pump (but running gas) and -8 all the way to the regulator (-8 return from the vacuum compensated regualator, and a bypass at the Mallory pump) and -8 to both carbs (two 4bbl w/ tunnerlram)

The fuel system is a bit non-typical but it idles at 6, is rock solid at 6 until it goes WOT, then the vacuum compensated regulator kicks it up to 9.5 and it stays there rock solid for the whole pass (data logging so I am positive about the 'dead steady psi' )

Same system feeds the 800HP motor in the Nova and also data logging rock solid fuel psi.

OVERKILL is way better than barely enough!!!

68 C-10 KID · 10-07-2011, 10:54 PM

I feed the pump with a -10 also. -8 to reg and the return line in -8.

nxtruck · 10-08-2011, 09:35 AM

I run -12 from the cell to the filter/pump combo, -10 from the pump to a y-block that feeds the regulators up front, and a -8 return from the Magnafuel pump back to the cell. My system is way overkill, but like Marv said, overkill is better than not enough.

BigDan3131 · 10-09-2011, 01:35 AM

My pump has the return built in and its mounted right below the tank. So I have a -8 line running there.
Cableguy I ran both because to and from because I could and I had an in when KB Performance was still selling the fitting themselves [50% discount]

10-07-2011, 07:54 PM	#1
BigDan3131 Registered User Join Date: Jun 2006 Location: Maple Valley, WA Posts: 1,913	Fuel Lines and Tanks I was just wondering if I went to overboard on my fuel system and what you guys are using compared to it. Engine size and horsepower figures added please. I have a an aluminum fuel cell holding 20 gallons and with it I used both outlets. I have -10 coming from the cell to my Mallory 250 filter and both outlets have -10 going into my Holley Billet 160 pump. From the pump I have a -8 line running to the regulator splitting into -6's to the carb. Im not so sure how power I'm making but when I did race it just to find out how fast it could go I ran 11.83 at 126 mph in the quarter. That's in my ElCo with a weight including me of 3550 pounds.

10-07-2011, 08:02 PM	#2
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	Re: Fuel Lines and Tanks A single line -8 would have been plenty. Why the two feed lines to the pump? The pump to the motor sounds perfectly fine. Keep in mind -8 line is 1/2 inch inside diameter and -10 is 5/8's inside diameter. -10 line can feed 1000 plus hp. __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

10-07-2011, 09:53 PM	#3
mightymouse Registered User Join Date: Feb 2011 Location: Crowley TX Posts: 979	Re: Fuel Lines and Tanks i got -10 from tank to pump to regulator -8 return to tank,,,, -6 to quick-fuel 850- 355 ci. solid-roller, super vic, trans brake, 430 gears plan on juicing it . if its to much the regulator has a return,,,room to grow Last edited by mightymouse; 10-08-2011 at 05:55 AM.

10-07-2011, 10:30 PM	#4
fastwillie 696969 ~Rest In Peace~ Join Date: May 2005 Location: CALIFORNIA NOR CAL Posts: 9,707	Re: Fuel Lines and Tanks i went -8 all the way to the carbs it had a -6 poor thing was starving __________________ is it fast ? it has a lighting bolt donut? B___H please, I can remove 90% of your so called "beauty" with a kleenex

10-07-2011, 10:48 PM	#5
Marv D Registered Truck Offender Join Date: May 2008 Location: hells training ground (aka Ariz) Posts: 3,118	Re: Fuel Lines and Tanks I have the Mallory Comp filter too Dan,, did it the same way but with two 8's to the filter, -8 to a Mallory 250 alcohol pump (but running gas) and -8 all the way to the regulator (-8 return from the vacuum compensated regualator, and a bypass at the Mallory pump) and -8 to both carbs (two 4bbl w/ tunnerlram) The fuel system is a bit non-typical but it idles at 6, is rock solid at 6 until it goes WOT, then the vacuum compensated regulator kicks it up to 9.5 and it stays there rock solid for the whole pass (data logging so I am positive about the 'dead steady psi' ) Same system feeds the 800HP motor in the Nova and also data logging rock solid fuel psi. OVERKILL is way better than barely enough!!! __________________ Still playin with trucks, even at my age! When you're dead, it's only a problem for the people around you, because you don't know you're dead. .....It's kinda the same when your STUPID. I just did my taxes and reviewed my SS statement. Thanks to the current administration it looks like I will only have to work till noon on the day of my funeral.

10-07-2011, 10:54 PM	#6
68 C-10 KID Mean Green Join Date: Sep 2007 Location: Portland, OR Posts: 522	Re: Fuel Lines and Tanks I feed the pump with a -10 also. -8 to reg and the return line in -8. __________________ 427 SBC 683HP & 590ftlbsTRQ @ fly wheel. 60'-1.38 1/4-10.43 MPH-124.6 New ET current 4/2019 AKA MEAN GREEN.

10-08-2011, 09:35 AM	#7
nxtruck Registered User Join Date: Jun 2006 Location: Jackson, Mo. Posts: 607	Re: Fuel Lines and Tanks I run -12 from the cell to the filter/pump combo, -10 from the pump to a y-block that feeds the regulators up front, and a -8 return from the Magnafuel pump back to the cell. My system is way overkill, but like Marv said, overkill is better than not enough. __________________ Chris 1966 Chevy C10 LWB, 434 sbc, TH350, 12-bolt, factory suspension, pump gas 7.02 @ 95.8, 1.45 60' 1965 Chevy C10 LWB, 355 sbc, TH350, daily driver

10-09-2011, 01:35 AM	#8
BigDan3131 Registered User Join Date: Jun 2006 Location: Maple Valley, WA Posts: 1,913	Re: Fuel Lines and Tanks My pump has the return built in and its mounted right below the tank. So I have a -8 line running there. Cableguy I ran both because to and from because I could and I had an in when KB Performance was still selling the fitting themselves [50% discount]



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