Revving Up: The U-Body GM 3.8 Supercharged Engine Swap
For those craving a serious adrenaline rush, the U-body GM 3.8 supercharged engine swap is a stellar upgrade that promises to deliver. This swap, involving the mighty L67 3.8L V6 engine from GM, known for its supercharged power in models like the Pontiac Grand Prix GTP and Buick Regal GS, can turn your U-body platform into a force to be reckoned with on the streets.
Why the L67 Swap?
Power Boost: The supercharged L67 engine packs a punch with its higher horsepower and torque output compared to the naturally aspirated 3.8 and 3.4. This means significantly improved acceleration, overall performance and better MPG’s if you can keep your foot out of it.
Engineering Compatibility: The U-body and L67 share a GM heritage, making the swap more manageable. With stock engine mounts, the engine can fit seamlessly into the U-body chassis, ensuring a stable and secure installation.
Aftermarket Support: There’s a wealth of aftermarket parts available to further enhance the L67's performance. From upgraded pulleys to high-flow intake systems, the potential for customization is vast.
What to Consider
Supporting Upgrades: With great power comes the need for great support. Upgrading the transmission, brakes, and suspension is crucial to handle the increased power and maintain safety.
Cooling System: The L67’s supercharger generates additional heat, so upgrading the cooling system is advisable to prevent overheating and ensure long-term reliability.
The Thrill of the Swap
Embracing the L67 supercharged engine not only transforms the driving experience but also adds a layer of exclusivity and excitement to your U-body vehicle. The unmistakable whine of the supercharger and the surge of power it provides are bound to make heads turn and smiles widen.
With the right planning, dedication, and a bit of mechanical prowess, the U-body GM 3.8 supercharged swap can be a dream come true for performance enthusiasts looking to push the boundaries of their vehicle’s capabilities.
Parts Needed:
98-05 L67 Engine
98-03 Grand Prix L67 Engine Wiring Harness
Soldering Iron or Weather Tight Butt Connectors
Tuned PCM From Ewalt’s Auto Tuning
The engine will both right to the stock 4t65e that came with the van. The 3.8 uses the stock 3.4 engine mounting. The stock van fusebox works with the grand prix harness, just couple wires that require removal. Only connector that requires repining is C101, and the EBCM (ABS Module)
Wire Diagrams: