1987 Buick Regal Engine Swap Project: Twin-Turbo Mercedes V12 under the hood

This 1987 Buick Regal T-Type is a true masterpiece, lovingly crafted by the owner, known as V12Buickguy. Under the hood, you'll find a roaring 5.5L M275 V12 engine from a 2005 Mercedes SL600. This isn't just any engine swap; it's been upgraded with FIC 1200 cc injectors, LSx coil packs, a Megasquirt MS3Pro ECU, and a pair of Precision PTE 6266 turbochargers. Originally producing 640 horsepower at the wheels on 14 psi of boost with pump fuel, this beast now runs at a fiery 24 psi of boost on E85 fuel.

Power is seamlessly transferred through a Mercedes 722.6 five-speed automatic transmission, controlled by a PCS TCM-2800 transmission controller and a high-pressure valve body from Sound German Automotive. A custom Driveshaft Shop driveshaft channels the power to a robust GM 10-bolt rear end, featuring a locking differential and 31-spline axles.

The suspension is just as impressive, with QA1 double-adjustable coilovers up front and custom-valved AFCO double-adjustable rear shocks by TRZ Motorsports. Stopping power is provided by Mercedes E55 8-piston calipers paired with Corvette C6 Z06 rotors. The car rides on stylish Weld RTS S71 wheels, measuring 18x8.5 inches in the front and 15x10 inches in the rear.

Here’s a list of the car categories involved in this incredible modification:

Engine Swap and Upgrades

• 5.5L M275 V12 from a 2005 Mercedes SL600
• FIC 1200 cc injectors
• LSx coil packs
• Megasquirt MS3Pro ECU
• Precision PTE 6266 turbochargers

Transmission and Drivetrain

• Mercedes 722.6 five-speed automatic transmission
• PCS TCM-2800 transmission controller
• Sound German Automotive high-pressure valve body

Custom Driveshaft Shop driveshaft

• GM 10-bolt rear end with a locking differential and 31-spline axles

Suspension and Brakes

• QA1 double-adjustable coilovers (front)
• TRZ Motorsports custom-valved AFCO double-adjustable rear shocks
• Mercedes E55 8-piston calipers
• Corvette C6 Z06 rotors

Wheels and Tires

• Weld RTS S71 wheels (18x8.5 inches front, 15x10 inches rear)

This is a Buick Regal T-Type that blends old-school charm with modern performance, making it a true standout for any car enthusiast.

Source:

V12Buickguy