Swapping an LS engine into an older-body-style (OBS) Chevy is a popular upgrade among enthusiasts, offering a potent blend of performance and modern technology. This comprehensive guide explores everything you need to know about OBS Chevy LS swap kits, covering the process, components, and considerations for a successful conversion.
What is an OBS Chevy LS Swap Kit?
An OBS Chevy LS swap kit typically bundles together the essential components needed to install a General Motors LS-series engine into a Chevy truck or SUV from the 1988-1998 model years (the "OBS" generation). These kits vary widely in scope, ranging from basic engine mounts and wiring harnesses to comprehensive packages including everything from transmission adapters to custom headers. The best kit for you will depend on your mechanical skills, budget, and desired level of customization.
What are the Benefits of an LS Swap?
The popularity of LS swaps stems from numerous advantages:
- Performance: LS engines are known for their power-to-weight ratio and relatively high horsepower output, significantly enhancing the performance of an OBS Chevy.
- Reliability: These engines are renowned for their durability and longevity, making them a reliable choice for daily driving or off-road adventures.
- Efficiency: Compared to the original engines found in OBS Chevys, LS engines often offer improved fuel economy.
- Modern Technology: LS engines incorporate modern fuel injection and other technologies, leading to smoother operation and better drivability.
- Availability: Parts and support for LS engines are readily available, making maintenance and modifications easier.
What Components are Typically Included in an LS Swap Kit?
The exact components included vary between kits, but common elements include:
- Engine Mounts: These are crucial for securely attaching the LS engine to the OBS Chevy's frame.
- Wiring Harness: A custom harness adapts the LS engine's wiring to the OBS Chevy's electrical system.
- Transmission Adapter (if needed): This allows for mating the LS engine to the original transmission or a different transmission entirely.
- Headers: Custom headers are often needed to clear the frame and other components.
- Accessory Brackets: These accommodate the alternator, power steering pump, and other accessories.
What are the Different Types of LS Swap Kits?
Kits range from basic packages to all-inclusive options:
- Basic Kits: These typically include just the essential components like engine mounts and a basic wiring harness, requiring more fabrication and mechanical expertise.
- Complete Kits: These offer a more comprehensive solution, including everything needed for the conversion, simplifying the installation process.
How Much Does an LS Swap Kit Cost?
The price of an LS swap kit varies dramatically depending on the components included and the level of customization required. Basic kits can start around $500, while comprehensive kits can cost several thousand dollars. Remember to factor in the cost of the LS engine itself, which can add significantly to the overall expense.
What Transmission Should I Use for My OBS Chevy LS Swap?
The choice of transmission depends on your intended use. Popular choices include the 4L60E, 4L80E automatic transmissions, and the T56 manual transmission. Careful consideration of the transmission's gear ratios and torque capacity is vital for a successful and reliable swap.
Do I Need Special Tools for an LS Swap?
While basic hand tools are necessary, you'll likely require specialized tools for various aspects of the swap. This might include engine hoist, torque wrenches, and potentially specialized tools for working with the wiring harness and transmission.
How Difficult is an LS Swap?
The difficulty level depends on your mechanical skills and the type of kit chosen. A complete kit simplifies the process, while a basic kit requires more fabrication and expertise. Consider your experience level when selecting a kit and seeking professional assistance if necessary.
This guide provides a comprehensive overview of OBS Chevy LS swap kits. Remember to research thoroughly, choose a reputable supplier, and carefully plan your project before beginning. Good luck with your swap!
