Jim Smart
December 1, 2006

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.

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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.

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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.