- Get link
- X
- Other Apps
The "Frankenstein" engine is a term used by enthusiasts to describe a hybrid engine built by combining parts from different factory engines. The most famous example within the Honda B-series family is the B20 VTEC swap.
What Is a B20 VTEC?
A B20 VTEC is a custom-built engine that combines a B20 block with a DOHC VTEC cylinder head from another B-series engine.
- The Bottom End: The engine uses the block from a B20 engine, typically sourced from a first-generation Honda CR-V (B20B or B20Z). The B20 is a 2.0-liter, non-VTEC engine known for its larger displacement and strong low-end torque.
- The Top End: The B20 block is paired with a VTEC cylinder head, usually from a high-performance B-series engine like the B16 (from a Civic SiR) or a B18C (from an Integra GSR or Type R).
Why Do Enthusiasts Build It?
The appeal of the B20 VTEC "Frankenstein" engine lies in its ability to combine the best of both worlds:
- More Torque: The B20 block's larger displacement provides a significant increase in low-end and mid-range torque, which is often a weakness of high-revving, smaller-displacement VTEC engines.
- More Power: By adding a high-flowing VTEC head, the engine gains the high-RPM horsepower and a higher redline that the stock B20 engine lacks.
The result is a powerful, well-rounded engine with an excellent powerband. It delivers strong torque for daily driving while still providing the exhilarating top-end power that VTEC is famous for. For many enthusiasts, the B20 VTEC is a more cost-effective way to achieve performance comparable to a factory B18C or other more expensive engine swaps.
Comments