Question

What are the differences between the V Twin Harley Davidson engine and the V Twin from other manufacturers besides the unique ignition angle, so that it can produce a limp and Harley Davidson-like boom sound?

Answer 1

The V-twin engine design is used by various motorcycle manufacturers, including Harley-Davidson. While the ignition angle does contribute to the distinct sound of a Harley-Davidson engine, there are other factors that differentiate Harley-Davidson's V-twin engines from those of other manufacturers. Here are some key differences:

1. Engine Configuration: Harley-Davidson engines typically use an air-cooled V-twin configuration, whereas other manufacturers may use liquid-cooled or hybrid designs. The air-cooled setup contributes to the classic appearance and sound of Harley-Davidson engines.

2. Engine Displacement: Harley-Davidson is known for producing large-displacement engines. Their V-twin engines often have higher displacement compared to other manufacturers, resulting in more low-end torque and a deeper exhaust note.

3. Engine Firing Order: Harley-Davidson engines commonly use a 45-degree crankpin offset, resulting in a firing order where the two cylinders fire at uneven intervals. This firing order contributes to the distinct "potato-potato" sound that many associate with Harley-Davidson motorcycles.

4. Exhaust System Design: The design of the exhaust system, including the shape and baffling, plays a significant role in the sound produced by the engine. Harley-Davidson often uses unique exhaust systems that are tuned to enhance the low-frequency rumble and deep exhaust note.

5. Overall Tuning and Harmonics: Harley-Davidson engines are tuned to deliver a particular riding experience, with an emphasis on low-end torque and a relaxed cruising style. This tuning, combined with factors like the engine's balance and vibration characteristics, contributes to the unique feel and sound of Harley-Davidson motorcycles.

It's worth noting that the sound of a motorcycle engine is influenced by a combination of factors, including the design, tuning, exhaust system, and even rider modifications. While other manufacturers may try to replicate the Harley-Davidson sound, achieving an exact replica can be challenging due to the various proprietary elements and engineering choices that contribute to the distinct character of Harley-Davidson's V-twin engines.