Build a Twin-Engine VW like this or similar
Bi-Curiosities: Volkswagen's Twin-Engine Terrors
Was a time I wanted to build a twin-engine Rabbit to compete in the Saba Hillclimb
Or buy a twin-engine Suzuki Escudo Time Trial Car. If you can drive, NOTHING will beat you. 956hp and 2400lbs wet.
Add twin turboed Hayabusas and you're over 2,000hp at the same weight or less.