It's been proven that a cold-air intake system adds power, but, if you're building a system for scratch, how large does it need to be? Years ago, I talked with old-time Mopar Super Stock racer John ...

Q: Tim, I've got a forced-air furnace. Several rooms in my house are cold in the winter and are hot and stuffy in the summer when the AC is on. Most of the rooms are comfortable. Why do you think this ...