Keep It Well Fed
In our quest for mind-bending performance, you would be amazed at how many of us forget the fuel supply. We take a six-cylinder Mustang, convert it to a big-block, and wonder why the darn thing falls on its face when we dump the clutch and mash the gas. That dinky little 51/416-inch fuel line that kept your six-popper well fed won't keep a 460ci fat-block happy.
 |  These are boosters in a Barry...  These are boosters in a Barry Grant Demon carburetor. Boosters help draw fuel from the bowl via the main metering jets. The shape of the booster both accelerates air flow through the booster and improves the fuel-spray fan pattern, which improves fuel atomization. Adjustable, replaceable air bleeds improve performance even more. The Demon carburetor is revolutionary to performance buffs because it takes carb tuning to a new level. |  The Edelbrock and Carter AFB/AVS...  The Edelbrock and Carter AFB/AVS have a cruise circuit like this. These boosters can be swapped as needs dictate and are easy to service. |
Proper fuel-line sizing is important. As a rule and a matter of growth, size your V-8 fuel lines at a minimum of 31/48-inch diameter. For drag or road racing, you may want to step up to 71/416-inch.
 The Holley 4150/4160 main...  The Holley 4150/4160 main metering system includes this metering block, which includes two main metering jets and a power valve located mid-block. Jet sizes can be varied to fit your engine's needs. Fuel is drawn through these jets to the boosters. The larger the jets, the more fuel is drawn from the bowl. |  |  When driving becomes extreme,...  When driving becomes extreme, we want to keep the boosters supplied with fuel. Jets with extensions help keep fuel going to the boosters in hard braking and cornering. |
While you're at it, think about fuel pump capacity. Shop for a fuel pump and consider gpm (gallons per minute) fuel flow. If the cost bothers you, consider that a lean condition caused by inadequate fuel delivery can do major engine damage, which costs a whole lot more than a fuel pump.
Stub Stack For Performance
There are a lot of so-called performance-improving products out there with big claims they can't back up. K&N's Stub Stack isn't one of them. MCE Engines has proven in real-world dyno-testing that the Stub Stack will make a difference in performance. It smoothes the air flow into the carburetor and increases velocity through the bores. This improves low-end torque and high-end horsepower. K&N and MCE Engines aren't making any wild claims about power. Try one on your performance carburetor and see what it does for you.