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This Screw-Blown 1978 Porsche 928 Is Drag-And-Drive Insanity

Porsche 928

One of the wildest cars at this year’s Sick Week drag-and-drive event — and at any race that its owner, Danny Humphreys, rolls it into — is this one-of-a-kind, screw-supercharged 1978 Porsche 928. With a Whipple supercharger seemingly as large as the German-made sports car itself, the bright blue Porsche turns heads, whether cruising down the highway or turning 6-second-capable performances on the strip.

Humphreys, from Midlothian, Texas, is an insurance agent by profession but a racer by passion. For Danny, engines and the thrill of speed have been integral parts of his life since 1984. Over the years, he has built, raced, and modified an array of cars, each one pushing the boundaries of speed and performance. His current pride and joy is a 1978 Porsche 928, an automotive marvel that has seen nearly two decades of evolution, evolving into a drag-and-drive car capable of thousands of miles of highway and dragstrip abuse, all in the same week.

A Racing Legacy

Humphreys’ journey into racing is as enigmatic as it is inspiring. “I have no idea how I got into racing because no one in my family had any automotive background,” he says. It was a self-made path that began with a 1977 Nova equipped with a big block, transitioning through a series of ever more powerful and complex vehicles. His early exploits in street racing gave way to more formal competitions, including a notable stint with a 1977 Vega running Top Sportsman, achieving a best e.t. of 7.60 in the 1/4-mile.

Porsche 928

After a hiatus to focus on family and business, Danny set out to return to the track with renewed vigor. He bought the Porsche 928 in 2001, a car that would become central to his racing endeavors. The initial configuration featured a 540 pump gas nitrous combo, but this was just the beginning. Over the years, the Porsche underwent multiple transformations, each iteration producing more power and speed. From a 557 blown big-block to the current 572 cubic inch SMX engine built by Steve Morris, the Porsche 928 has gone from mild to purely wild, in both performance and looks.

The Build: A Labor of Love

The journey to transform the Porsche 928 into a drag-and-drive beast was neither quick nor straightforward. “It took me quite a while to get everything done,” Danny reflects. “Life happened.” Purchased in 2001, the car was immediately stripped of its original Porsche engine. Danny backhalved the chassis and installed the 540 pump gas nitrous engine. This setup was…

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