How does a variable‑geometry exhaust system influence low‑end torque and overall power?

18 Eki 02:00

Trying to understand the theory behind variable‑geometry exhausts: how does changing pipe diameter or flow path at different RPMs affect scavenging, low‑end torque, and top‑end power? Is the benefit mostly a smoother torque curve or can it actually raise peak horsepower? Also, are there notable trade‑offs like added weight or complexity that might offset the gains? Would love to hear how you approach tuning such systems and what results you’ve seen in practice.