Pontiac Firebird – Birdman’s 3000HP Firebird – FLAMETHROWER Wheelies!

A Firebird running twin 98mm turbochargers on a 622 cubic inch big block Chevy and claiming 3,000 horsepower sounds far-fetched until you see the hardware involved. Here’s how that combination compares to other extreme twin-turbo Firebird builds – some making a fraction of the claimed power – and what it actually takes to reach four-digit horsepower numbers with a big block this size.

This Crazy Firebird is powered by twin 98mm turbo’s boosting the 622ci big block Chevy engine!!

A 3,000-horsepower claim is the kind of number that should make anyone skeptical – until you see what’s actually bolted to the engine making that claim. This Firebird runs twin 98mm turbochargers, a size normally reserved for full-tilt drag radial or Pro Mod cars, feeding a 622 cubic inch big block Chevy that’s already nearly double the displacement of anything GM ever put in a Firebird from the factory. The nickname “Birdman” and the flamethrower antilag wheelies that come with it suggest this car was built for spectacle as much as speed. But how does that number stack up against other extreme twin-turbo Firebird builds out there – and is 3,000 horsepower actually believable?

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622 Cubic Inches Is Already Deep Into Race Engine Territory

A 622 cubic inch big block Chevy is nowhere near a stock displacement – GM’s largest production big blocks topped out around 454 cubic inches, meaning this engine has been stroked and bored well past anything that ever left a factory. Feeding that much displacement with twin 98mm turbochargers – a size class more commonly seen on all-out drag radial and Pro Mod cars chasing four-digit horsepower numbers – is a serious statement about what this build is chasing. For comparison, complete crate big blocks in the 555 cubic inch range are commercially rated around 3,000 horsepower at roughly 35 psi of boost when paired with a proper standalone engine management system, giving a rough sense of what territory a build like this actually lives in.

Where This Build Sits Among Extreme Twin-Turbo Firebirds

This isn’t the only serious twin-turbo Firebird out there. BBT Fabrications built a twin-turbo 1969 Firebird making roughly 1,400 horsepower capable of 200-plus mph runs, and Gale Banks’ well-known twin-turbo Firebird builds have historically targeted a more modest 500 to 700 horsepower depending on the customer’s goals. Against that backdrop, a 622ci big block on 98mm turbos claiming 3,000 horsepower sits at the extreme end of what’s being built in the Firebird world – closer to a dedicated drag-only combination than a street-driven twin-turbo cruiser.

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