The morning mist did not rise from the Eifel mountains; it clung to the black asphalt like cold grease.
At seven in the morning, the Nürburgring Nordschleife looked less like a racecourse and more like an abandoned ribbon of highway cutting through an endless primeval forest of pine and wet slate. The air smelled of crushed wet pine needles, wet leaves decomposing on gravel traps, and the bitter, sharp ozone of damp ignition coils.
Beside the historic pit lane at the southern loop, the Grand Prix White Carrera RS 2.7 sat with its ducktail spoiler pointing toward the mist.
Overnight, under the quiet, unspoken supervision of Dr. Helmut Brandt himself, the engine had undergone an emergency operation in the private corner of the Weissach experimental workshop. With Marcus standing beside the engine stand, the high-tensile 10.9 steel bolts had been painstakingly extracted one by one. In their place, using custom brass sleeves and original-specification ductile 8.8 cadmium hardware retrieved from a wooden drawer marked Versuch 1972 (Experimental 1972), the magnesium case had been brought back to its proper clamping tension.
Now, the car waited to see if the cure had worked under full operating load.
Arthur Vance leaned against the steel armco barrier, wearing a heavy, dark-green Barbour wax jacket over his turtleneck. A stopwatch hung around his neck from a braided cord, though he had not lifted it. Standing beside him was a short, stocky man of sixty with a weathered, leathery face and pale blue eyes that looked as though they had spent half a century staring through rain-swept Lexan windscreens.
"Klaus," Vance said, turning his head slightly. "You remember the car?"
Klaus Lindemann, a former factory test driver whose right knee bore the metal pins of a 1976 crash at the Flugplatz crest, tapped his leather driving gloves against his thigh.
"I remember the sound, Arthur," Lindemann said in a rough, gravelly German accent. "Your father brought it here in seventy-four for the tourist trophy. He drove like an American—too much brake, not enough curb. But the engine... that engine had an appetite. It ran like a scalded wolf."
Lindemann turned his eyes toward Marcus.
The teenager stood near the open driver’s door, dressed in a new, unbranded navy mechanics' jumpsuit Vance had purchased for him at the Frankfurt airport terminal. The fabric was still stiff, the legs slightly long, but Marcus had rolled the cuffs up twice with practical indifference. In his right hand, he held a long, thin brass tuning rod; tucked into his collar was a pair of industrial mechanic's stethoscope earpieces.
"You're trusting a boy to tell me if the bearings will hold at seven thousand revs down the Döttinger Höhe?" Lindemann asked Vance, raising a gray eyebrow. "If a rod lets go at two hundred and sixty kilometers an hour, the rear wheels lock instantly. The car spins like a coin. There are no runoff areas out there, Arthur. Only oak trees and iron."
Marcus didn't wait for Vance to defend him. He walked around the front of the car, stopping three paces from the veteran driver.
"The number three bearing isn't the danger anymore," Marcus said. His voice was calm, cutting through the damp morning chill. "We relieved the crush on the casing web. The crank rotates with zero point zero zero one inches of radial clearance across the center journal. But your third carburetor is pulling two millimeters less vacuum through its auxiliary idle passage."
Lindemann’s eyes narrowed. "And what does that mean when I lift off the throttle going into the Karussell?"
"It means when you drop from fourth gear to third on engine braking, cylinder four will run lean for half a second," Marcus answered, pointing a slender finger toward the right cylinder bank beneath the decklid. "You’ll hear a faint pop in the intake manifold. Don't fight it with the throttle. Feather the clutch, let the revs settle to four thousand, and let the fuel bowl refill before you get back on the power. If you stay on the pedal while it’s popping, the exhaust valve will burn."
Lindemann stared at the boy. For five long seconds, the old racer did not speak. He looked from Marcus’s calm brown eyes down to the brass rod in his hand, then turned his gaze toward Vance.
"Where did you find this one, Arthur?" Lindemann asked quietly.
"In Bay 4," Vance replied without smiling. "Holding a mop."
Lindemann pulled on his vintage pigskin driving gloves, stretching the leather over his scarred knuckles. A slow, wolfish grin spread across his weather-beaten face.
"Get in the passenger seat, boy," Lindemann commanded.
Elena Brooks would have suffered a heart attack had she been there. Even Vance’s stoic composure cracked for a fraction of a second, his gray eyes widening slightly.
"Klaus," Vance cautioned. "He is not a track mechanic. He has never experienced high lateral G-forces."
"If he wants to tell me how my engine breathes," Lindemann said, opening the lightweight door and sliding his frame into the bucket seat, "he needs to feel it choke at the limit. Put a helmet on, Marcus. Let’s see if your ears work when your stomach is in your throat."
Marcus didn't look at Vance for permission. He picked up an open-face Bell racing helmet from the pit wall, strapped the chin buckle tight beneath his jaw, and climbed into the passenger seat without a single word of hesitation.