Building a High-Flow Fuel System

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Building a High-Flow Fuel System – The Big Bang Theory

Written by Wayne Scraba on January 10, 2014


If you have spent any time running your car at the dragstrip, one thing in the overall tune-up becomes quite clear, and quickly: Getting fuel—and enough of it—to the carburetor is pretty important. You might think this is easy, but it’s not, especially if you want to get it done with a lone, stock-style mechanical fuel pump.

Here’s the scenario. Think of drinking an old-fashioned milkshake, but instead of using the big fat straw the shake normally comes with, substitute it for the itsy-bitsy straw you’d use with soda pop. You’d have a difficult time getting a mouthful of shake with the little straw. The same applies to a fuel system, which is why some performance cars from the muscle car-era were factory fitted with fuel lines larger in diameter than on more pedestrian cars (for example, a ⅜-inch line instead of a more common 5⁄16-inch job). But lines aren’t the only part of the fuel delivery equation. To feed a hungry big-block, you have to take each and every part of the fuel system into consideration. Making it work with stock-style or stock-appearing pieces is another story.

Read more: https://www.hotrod.com/how-to/engine/1401-building-a-high-flow-fuel-system/


 

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