racecar fuel delivery

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OiiiiiiO

OiiiiiiO

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any racecar guys out there have pictures of their fuel systems that they can share with me ? i need to see some different setups so i can figure out what i want to do. if i ask 10 people, i get 10 or 12 different theories. i`m confused. right now i`m dumping 2 #8 an ports down to a y setup then down to a bg filter then over to a holley black to a # 10 line to the regulater. i`m told the regulater should be placed in different places and this really has me confused. close to the carb., by the grill or on the inner fender well. is there an ideal location for the reg.?? many thanks
 
I've had diferent style regulators, in a couple different places, on a racer, and a Holley reg seemed to work best up on the valve cover, close to the carb. I liked the Mallory return style reg also, but it required much more plumbing and I don't think I'd recommend it.
Sounds like you're trying to feed a monster? #10 is gonna require a pretty health pump to push the fuel to the front and keep it there.
 
May I recomend this site for a quick review? http://www.barrygrant.com/bgfuel/default.aspx?page=81#FUELDELIVERY

I know that some people have had problems with BG carbs, but the above information makes sense. Fuel delivery on a true strip car should come from the front, curving back to the regulator and carb with the reg as close the carb as possible.

Please give us more info in regards to your application. For example, are you running N20? What times are you presently running? Big block?
 
ramcharger said:
May I recomend this site for a quick review? http://www.barrygrant.com/bgfuel/default.aspx?page=81#FUELDELIVERY

I know that some people have had problems with BG carbs, but the above information makes sense. Fuel delivery on a true strip car should come from the front, curving back to the regulator and carb with the reg as close the carb as possible.

Please give us more info in regards to your application. For example, are you running N20? What times are you presently running? Big block?
Click to expand...

This is exactly correct. You want the line feeding the regulator to come from the front so the inertia of acceleration is feeding the regulator, not starving it, and you want the regulator as close to the carb as possible (preferably on a carb mounting plate) so it can react as quickly as possible when the pressure drops.
 
Heres another link for some good info on fuel systems.

http://www.magnafuel.com/support/index.htm

In general most manufacturers will say keep the pump close to the tank with a filter before the pump and the regulator as close to the carb a possible.

I normally use the holley blue for normal street/limited strip cars with -8 or 1/2" fuel lines.

For something a little more serious a Magnafuel Quickstar 300 with -10 fuel lines.

Holley blue.jpg


Magnaflow 300.jpg
 
Back in the late 70's when he won Pro Stock in a plymouth Arrow, Bob Glidden only used a blue holley pump. That should tell ya something.
 
What do y'all think about a high volume Carter mechanical fuel pump?

I've been told by a couple engine builders that this is a good way to go.

I am no expert as I'm at this stage as well with my car trying to get all the info I can before I make a final decision.
 
ok guys all have good info here but you want your feed line at least 1 size larger into the pump then coming out. going into a y-block to do this isn't the same you still have the same size orifice, also place your regulator as close to the carb as possible. on a single carb application a -8 from the pump to the regulator and -6 to each carb bowl is plenty for running some 9 sec. quater mile times. also the carb is a restriction also due to the size of the needle and seats.
 
Bracket is from AED. Arlen Vankes 68 SS Hemi Cuda runs a mechanical fuel pump. I believe they were carters back then. Edelbrock makes some nice billet mechanical ones.
 
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