The phrase "loud pedal" means pressing the gas pedal forcefully, making the car engine produce a loud sound and go faster.
Sentences with «loud pedal»
And then you press the very loud pedal and you remember what Corvettes do best. (evo.co.uk)
Well, if you dare to give the aluminium loud pedal a firm prod in the lower gears the car's rear end steps out instantly, lighting up the expensive 295/30 Pirellis in a flash. (evo.co.uk)
Touch the loud pedal, even if you've now slowed to a crawl, and the timer will reset. (ign.com)