Ignition timing is easily the single most important tuning adjustment on an internal combustion engine and yet the concept of ignition curves continues to be elusive for many enthusiasts. Yet all it ...

Improving fuel economy or gaining horsepower means making the engine more efficient. Fuel economy or maximum power is only obtainable when the correct air/fuel mixture or ratio (a richer mixture for ...

Ignition timing is like seasoning: some is good, but too much ruins the results. Bumping up the ignition timing on pushrod 5.0s is a time-honored trick to wake up the under-hood lump. The EFI system ...

Having a car with outrageous low-end throttle response and top-end horsepower is something every gearhead strives for. The correct combination of parts will get you close, but it’s the tune-up that ...

"It's not a heap, dad. It's a classic." That's harder to justify when your classic muscle car won't start. Nothing like a high-compression V8 combined with a battery that hasn't seen a charge for a ...

You just put your new crate engine together and your adrenaline is pumping. Pump the throttle, turn the key, and… the thing runs like a total dog. It idles fine, but as soon as you step on the ...