For High Performance/Racing:
* AFR (Air Flow Research) 210cc or 227cc heads: These are known for excellent flow numbers and are a popular choice for high-performance street and racing applications. The larger 227cc runner is better suited for higher RPM applications. They're expensive, but offer top-tier performance.
* Trick Flow Twisted Wedge 195cc or 205cc heads: A strong competitor to AFR, Trick Flow heads also boast excellent flow characteristics, often at a slightly more competitive price point. Again, chamber size choice depends on your RPM range.
* Brodix BR7 heads: Brodix offers several high-performance heads, with the BR7 being a popular option known for its robust design and high flow.
For Street Performance/Moderate Budget:
* Edelbrock Performer RPM heads: These are a great balance of performance and affordability. They offer good flow for a street engine and are relatively easy to install and work with. Good for broader RPM ranges than the higher-end options.
* Dart Pro 1 heads: Dart offers various heads, and the Pro 1s represent a good step up from Edelbrock Performer RPMs in terms of flow, while remaining relatively budget-friendly.
Things to consider when choosing:
* Chamber Volume: Smaller chamber volumes generally increase compression ratio, leading to more power at lower RPMs. Larger chambers lower compression, beneficial for higher RPM applications and using lower octane fuel.
* Intake Runner Volume (cc): This affects the engine's power band. Smaller runners generally provide better low-end torque, while larger runners are better suited for high RPM power.
* Valve Size: Larger valves generally improve flow, but can require more porting work.
* Budget: Prices vary dramatically between manufacturers and models.
* Intended Use: A head perfect for drag racing won't necessarily be ideal for a daily driver.
Beyond the heads themselves: Remember that proper porting, valve job, and other engine modifications will significantly impact overall performance, regardless of the heads you choose. The heads are just one component of a well-tuned engine.
In short, research specific models based on your desired horsepower, RPM range, budget, and intended use. Reading reviews and comparing flow numbers is essential for making an informed decision. Talk to engine builders or experienced enthusiasts for tailored advice.
