This pearl white Firebird GTA hides two turbochargers on a Buick V6, not a big-block, yet still runs seven-second quarter-miles. Buick proved decades ago with the Grand National and GNX that a boosted V6 could embarrass V8s. Here is why that same formula still works today.
A 7-second V6 Firebird!? WHAT!? That’s right…a Buick V6 to be exact! And to top it off, it not only has one but TWO turbochargers strapped to this beautiful pearl white Firebird GTA!
A Firebird running seven-second quarter-miles should have a big-block or a built LS under the hood. This one does not, and that is exactly what makes it worth a second look. Under that pearl white GTA’s hood sits a V6, the kind of engine muscle car fans usually dismiss as the “secretary’s special” option, not a serious performance piece. Add two turbochargers to that same V6, though, and the conversation changes entirely. So why does a Buick engine, of all things, keep showing up in builds that embarrass big-block Firebirds?
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The Buick V6 Has Been Doing This Since the 1980s
Turbocharging a Buick V6 is not a new trick; Buick’s own Regal Grand National and, in 1987, the ultra-limited 547-unit GNX proved decades ago that a turbocharged 3.8-liter V6 could out-accelerate contemporary Mustang and Camaro V8s while nipping at the heels of the Corvette. The 1986 Grand National added an intercooler and jumped to 235 horsepower and 330 lb-ft of torque from the factory, numbers that stunned an industry still assuming V8 displacement was the only path to real performance.
Why It Works Just as Well in a Firebird
Swapping that same turbocharged Buick V6 architecture, or a similarly built twin-turbo version like this Firebird’s, into a GM F-body makes sense mechanically since Firebirds and Regals share GM’s broader engineering lineage from the era, and a boosted V6 offers a lighter nose and a different power curve than a traditional big-block. Running two turbochargers instead of Buick’s original single-turbo setup pushes the combination well past what the factory Grand National ever produced, which explains how a car most people would overlook in a parking lot is capable of seven-second quarter-mile passes.
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