I'm considering adding a mild‑hybrid setup—essentially a small electric motor and battery pack—to a traditional American V8 platform. The goal would be to capture kinetic energy during braking and provide a modest torque boost, while keeping the engine’s character intact. From a technical standpoint, what are the main challenges in terms of packaging, drivetrain integration, and control strategy? Also, how much real‑world fuel savings can one realistically expect without compromising the car’s performance feel? Thoughts?
Can a mild‑hybrid conversion improve fuel economy of a classic V8 without losing power?
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The toughest part is squeezing a compact motor and a shallow lithium pack into the already‑crowded V8 bay—most builders bolt the motor to the transmission housing and tuck the battery under the rear seat or trunk floor, which often means custom brackets and rewiring the fuel pump and ignition. A simple control strategy works best: use a dedicated controller that harvests regen on brake pressure and adds torque only at low‑load RPMs, leaving the stock ECU untouched for the rest of the map. In real‑world tests, a mild‑hybrid conversion on a classic V8 typically nets 5‑10 % fuel‑economy improvement without noticeable loss of throttle response or sound.