Overview of the Proposed Conversion Kit
The thread proposes an aftermarket conversion kit for Vortec engines, transforming them from single-point fuel injection (SCFI) to multi-point fuel injection (MPFI) with external injectors. This would allow users to choose larger injectors and simplify injector upgrades, addressing issues such as dripping and leaking regulators.
Benefits of the MPFI System
The conversion would offer several benefits, including easier injector replacement, improved performance, and reduced maintenance issues associated with the current SCFI system.
Kit Contents and Design Considerations
The kit would include:
- An intake manifold that bolts to Vortec heads with provisions for external injectors
- Fuel rails, external fuel pressure regulator (FPR), and injectors
- A wiring harness connecting the SCFI connector to the injectors
- Compatibility with existing throttle bodies, sensors, and emissions systems
The design would aim to use existing fuel rail configurations, such as those from LT1/TPI engines, to reduce costs and simplify installation.
Cost Estimates and Community Interest
Initial estimates suggest the kit could cost between $400 and $600. However, some users argue that the cost could be higher due to the need for custom harnesses, intake design, and emissions compliance. There is significant interest in the project, with several users expressing willingness to pay up to $1100 for a plug-and-play solution.
Real-World Examples and Fabrication Details
One user mentions a real-world example of a GMPP Vortec TBI intake converted to MPFI, which retains EGR and EVAP systems. This example demonstrates the feasibility of the conversion and provides a blueprint for the design.
Community Response and Willingness to Pay
The community response is overwhelmingly positive, with many users expressing interest in the project. There is a clear demand for a simple, bolt-on solution that avoids the need for extensive fabrication work.