03/09/2008 10:16. Most EFI GM performance fans are familiar with the intercooled Turbo Buicks of 1986 and 1987. These G-bodies were loaded with a 231-inch V-6 engine, enhanced with a Bosch sequential EFI system, and stuffed with 12 pounds of chilled boost thanks to a Garrett turbo and intercooler. The 3.8L mills were laughably underrated at 245 horses and 355 lb-ft of torque; one magazine's drag test of an '86 model produced an astounding 13.9 at 98 miles an hour.... // GM High-Tech Performance Magazine