A few weeks ago, we showed you a video of a Turbocharged 6.0 liter LQ9 V8 Swapped Grand National this week we’ve found one that’s bringing even more power to the table.
This our friends, is a twin-turbocharged (and factory supercharged) 6.2 liter LSA swapped 1987 Buick Grand National and it only has 5,200 original miles on it.
The project comes from forum user tdishon via LS1Tech.com. The owner comments a lot of work went into this swap, and some of you may be asking yourselves why someone would want to LS swap an original Grand National with such low mileage in the first place. It’s a valid question, and we’re all fans of the last muscle car offered by Buick.
The owner comments in the thread that this specific car was his dream car, ever since he graduated high school. He had always wanted one, and dreamed of making the car even faster. He admits he got a lot of flack from other forum members on the Grand National forums, however, that didn’t stop him from fulfilling his dreams of purchasing a low mileage and rust-free starting point for his project.
Modifications such as reinforcing the frame, swapping the factory K-member, and the entire cooling system being overhauled have taken place to make this swap possible. Custom F-body engine mounts from Spohn Performance were used used to house the new LSA engine.
Transmission duty has been assigned to a custom-built Lonnie Diers Extreme Stage III 4L80E, and it’s a tough one. The owner had a custom billet gear set made for 1st and 2nd gear (which uses the same ratio as the 200R4). A shorter than stock driveshaft had to be used as well, and a longer shifter stick was necessary to utilize the neutral safety switch and reverse lights. Everything is housed through a Summit Racing Transmission Crossmember.
The compound setup puts down a healthy 965 horsepower and 931 lb-ft of torque to the rear wheels on it’s highest setting. It’s been tuned by Forced Induction Tuning, located in Phoenix, Arizona to use E-85 on 24 pounds of boost from the turbos (the supercharger pulley has been left stock).
As of this time, the owner is currently having an all-wheel-drive system tested on a donor ’86 Buick Regal, which he plans to use in this ’87 GN. We’re excited to see what’s next for this car, as there’s so much more information in the owners build thread. We recommend checking it out, as this has to be one of our favorite projects we’ve come across lately.