http://www.summitracing.com/parts/edl-1722/overview/
the needle/seat, in a carbs float bowl,controls the fuel level by opening and closing the needle valve, in the fuel bowl, and its designed to generally can control fuel inlet pressures below 8 psi
(but generally works best at 5-6 psi)volume of flow only come into play once the needle valve opens and that relates to how quickly the floats being raised back to the point the needle seat closes

YOU GENERALLY SET THE FLOATS TO JUST LET FUEL WET THE SITE PLUGS LOWER THREADS, BY ADJUSTING THE NEEDLE SEAT HEIGHT IN THE FLOAT BOWL


A COUPLE HIGHER FLOW ELECTRIC FUEL PUMPS
http://www.jegs.com/i/Holley/510/12-150/10002/-1 (this pump has proven to work really well in many 500hp-to-600hp carb equipped cars)
http://www.jegs.com/i/Edelbrock/350/1792/10002/-1 (this is overkill unless your exceeding 600hp)
VERY INTERESTING ADDITION TO THE POTENTIAL FUEL SYSTEM DESIGN
http://www.motoiq.com/MagazineArticles/ ... rvoir.aspx
if your looking for an EFI fuel pump this link and its sub links will be useful
viewtopic.php?f=32&t=33
LOOK AT THE CHART POSTED BELOW.
KEEP IN MIND IF YOU DECIDE TO GO FOR A CHEAPER FUEL PUMP LIKE THIS RATED AT 30 GPH,
(THE RATED FREE FLOW RATE ALWAYS EXCEEDS THE BACK-PRESSURE RESTRICTED RATE, OF FLOW IT ACTUALLY OPERATES AGAINST)
your limiting the potential power its designed too feed to under 400hp
http://www.summitracing.com/parts/CRT-M4530
fuel injection usually requires a 40psi plus fuel pressure, the line size and the fuel pressure regulator will have a big effect on your results, theres some threads and calculators above that will help,
generally a 110-150 gph pump and 3/8" / AN#6 lines minimum ,works fine up to about 550- maybe even 575hp, IN A FEW CASES with carbs BUT above that POWER LEVEL Id suggest a 1/2 AN#8 line
(Ive always used AN#8 and a 135 gph-150 GPH rated pump on carb equipped application's for street/strip cars")
and selecting a fuel pump that can supply at least 50% more flow than the carb or injectors can flow to compensate for the flow restrictions the filter and lines etc. provide. THERES A SET OF CALCULATIONS BELOW TO ALLOW YOU TO MATCH YOUR APPLICATION TO WHAT YOU NEED IN A FUEL PUMP FLOW RATE
now I,m sure youll find formulas that indicate you can easily get by with a 70-80 gph fuel pump on most street driven engine combos, but my experience, and that of many other muscle car owners, has shown that the rated flow and the actual fuel delivery varies due to restrictions in fuel lines and fittings on those fuel lines and inertial loads, during acceleration
I generally run hard lines for fuel supply and return, but I have run flex lines inside 3/4" emt electrical tubing inside the frame rails ,except for the last 18" between fuel pressure regulator and carb. I buy flex and or hard lines at the local hydraulic supply after I measure very carefully then have them fabricate the lines.. with the correct ends fabricated on the ends of the lines.
Ive found , running 3/4" EMT tubing which is fairly easy to bend then slipping flex line thru it to be a good system, and yes before you ask youll want to have two because youll have a RETURN LINE , but having two hard lines and skipping the flex inside the protective outer EMT, takes up less room[/color]

http://static.summitracing.com/global/i ... a-5250.pdf


keep in mind that thats the minimum required, a fuel system has restrictions to flow rates like filters ,fitting and internal line flow restrictions requiring you to have a slightly higher actual supply volume and pressure
I used a earlier version of this fuel pump on my last carb race car
any electric fuel pump location, should be as close to the tank and as low as possible, having the pump gravity fed from the tanks a big help because electric pumps PUSH fuel FAR more efficiently than they can draw or suck fuel, if it takes much resistance to get fuel to flow to the electric fuel pump feed its almost always going to cause some problems.
in an ideal install you'll frequently use a factory made baffled fuel cell to replace the original and use an internal mount fuel pump that allows fuel around the pump to cool the pump and provide a far more efficient fuel supply
read this thread
and use the calculator
http://2.3liter.com/Calc1.htm#FPHP
viewtopic.php?f=55&t=733&p=1030&hilit=fuel+cell#p1030
if you choose to add a weld on sump don,t cut a huge sump size hole is reduces tank structural strength, this picture suggests drilling large holes in the tank floor before welding on the sump, Ive found 3-to-5 1/2" holes rather centrally located over the sump and AN#8 fuel lines are all thats required even on an 800hp big block car




BTW BEFORE WELDING ON A FUEL TANK WASH IT OUT WITH SOAPY WATER RINSE SEVERAL TIMES AND FILL THE TANK WITH WELDING SHIELD/inert GAS LIKE ARGON OR C02 BEFORE WELDING ON A SUMP
now many guys do find that its much cheaper to weld a sump to an existing fuel take and modify it for a larger external mount electric fuel pump
yes I know you don,t want to read the linked info and use calculators.....its mandatory if you want correct
http://www.weldonracing.com/product/64/ ... _Pump.html
answers read thru these threads carefully
http://www.quickfueltechnology.com/tech ... l-pressure
http://www.centuryperformance.com/fueli ... g-140.html
http://web.archive.org/web/200701062316 ... 1.htm#FPHP
viewtopic.php?f=55&t=635
viewtopic.php?f=55&t=7787&p=34866&hilit=stainless+fuel+lines#p34866
http://www.knizefamily.net/minimopar/fuelsystem.html
http://www.epi-eng.com/piston_engine_te ... ciency.htm
viewtopic.php?f=44&t=7848
viewtopic.php?f=55&t=211
http://www.atlinc.com/racing.html
viewtopic.php?f=55&t=7787&p=26658#p26658
viewtopic.php?f=55&t=1939
viewtopic.php?f=55&t=1200
viewtopic.php?f=55&t=1030
viewtopic.php?f=55&t=5149
viewtopic.php?f=55&t=7787&p=26715#p26715
viewtopic.php?f=55&t=733&hilit=fittings
viewtopic.php?f=55&t=231&p=275&hilit=+fittings#p275
http://2.3liter.com/Calc1.htm#FPHP
http://www.rceng.com/technical.aspx
http://www.chevyhiperformance.com/techa ... ewall.html
viewtopic.php?f=55&t=635&p=3063&hilit=mounting#p3063
viewtopic.php?f=55&t=1860&p=4870&hilit=fuel+pump#p4870
http://www.witchhunter.com/injectorcalc1.php4
as a rough guide, and assuming your running a carb engine with the correct fittings and fuel pump etc
this is about the max hp those fuel lines can be expected to support
AN4 (5/16")=375hp
an6 (3/8")=575hp
AN8 (1/2")=850hp
if your running a return style fuel pressure regulator it depends on the instructions that come with it and the number of ports,its usually mounted AFTER the two carb inlet fuel feeds
the pump feeds the fuel log, the fuel log feeds both carb inlets and the regulator mounted on the far end of the fuel log from the fuel feed bleeds off excess pressure to the return line to the the tank.

BASIC CAR FUEL SYSTEM DESIGN
but on some models its mounted just before the fuel log on the port labeled "CARB" and the two other ports are labeled "feed" for the pump and "RETURN", for the return line
Assume a BSFC of 0.55 and gasoline at 6.25 lbs/gallon: BFSC Brake Specific Fuel Consumption
horse power x 0.55 = pounds of fuel burned per hour
example
600hp x .55=330lbs
330lb /6.25lbs per gallon=52.8 gallons an hour minimum fuel used.....keep in mind pumping loss thru the lines , inertial loads and heat can easily reduce actual flow rates by more than 50% so if you require 50gph your unlikely to meet demand with less than a 100-120 gph pump even with the correct line sizes[/b]
http://www.centuryperformance.com/fueli ... ncies.html
HERES SOMETHING FAR SUPERIOR, to stock fuel filters if you need something better

http://www.aemelectronics.com/universal ... ilter-1212

KEY FEATURES
Machined from 6061-T6 aluminum and hard anodized black
Flows up to 12.32 gpm @ 45 PSI and 2.63 gpm @ 6 PSI with -10 port fittings
Filters as low as 7 microns
Viton o-rings and gaskets ensure outstanding performance when using gasoline, alcohol or gasoline/alcohol blended fuels
End caps are machined with -10 AN female fittings with o-ring receiver groove
End caps have pressure intensifiers for greater sealing of end gaskets
2†OD x 10†length for easy mounting
Commonly available replacement filter cartridges
Laser etched with AEM logo, flow and filter replacement information
The AEM High Flow -10 AN Inline Fuel Filter is CNC machined from 6061-T6 Aluminum and Hard Anodized Black. AEM’s engineers designed this filter with the racer in mind and with the intention of maximizing flow, filtration and ease of installation. The end caps are machined with -10AN female fittings with o-ring receiver groove that allow the filter to flow up to an astonishing 12.32 gpm @ 45 PSI and 2.63 gpm @ 6 PSI. All sealing o-rings and gaskets are made of Viton for outstanding performance when using gasoline, alcohol or gasoline/alcohol blended fuels. The commonly available replacement filter cartridges filter as low as 7 microns. The standard 2†OD allows for easy mounting virtually anywhere in the vehicle.
read thru the links and sub links
viewtopic.php?f=32&t=1148&p=5322&hilit=+crossfire#p5322
viewtopic.php?f=2&t=3064&p=8136&hilit=renegade#p8136
viewtopic.php?f=48&t=2828&p=7301&hilit=firing+order#p7301
viewtopic.php?f=44&t=773
viewtopic.php?f=32&t=1401