When Kevin Erickson fires up his 1972 Plymouth Satellite, a faint hum replaces what is normally the sound of pistons pumping, gas coursing through the carburetor and the low thrum of the exhaust.

Even though itB次元官网网址檚 nearly silent, the classic American muscle car isnB次元官网网址檛 broken. ItB次元官网网址檚 electric.

Erickson is among a small but expanding group of tinkerers, racers, engineers and entrepreneurs across the country who are converting vintage cars and trucks into greener, and often much faster, .

Despite derision from some purists about the converted cars resembling golf carts or remote-controlled cars, electric powertrain conversions are becoming more mainstream as battery technology advances and the world turns toward cleaner energy to combat climate change.

B次元官网网址淩C cars are fast, so thatB次元官网网址檚 kind of a compliment really,B次元官网网址� said Erickson, whose renamed B次元官网网址滶lectrolliteB次元官网网址� accelerates to 0-60 mph (0-97 kph) in three seconds and tops out at about 155 mph (249 kph). It also invites curious stares at public charging stations, which are becoming increasingly common across the country.

At the end of 2019, Erickson, a cargo pilot who lives in suburban Denver, bought the car for $6,500. He then embarked on a year-and-a-half-long project to convert the car into a 636-horsepower electric vehicle (475 kW), using battery packs, a motor and the entire rear subframe from a crashed Tesla Model S.

B次元官网网址淭his was my way of taking the car that I like B次元官网网址� my favorite body B次元官网网址� and then taking the modern technology and performance, and mixing them together,B次元官网网址� said Erickson, who has put about $60,000 into the project.

Jonathan Klinger, vice president of car culture for Hagerty Insurance, which specializes in collector vehicles, said converting classic cars into EVs is B次元官网网址渄efinitely a trend,B次元官网网址� although research on the practice is limited.

In May, the Michigan-based company conducted a web-based survey of about 25,000 self-identified automobile enthusiasts in the United States, Canada and the United Kingdom. About 1% had either partially or fully converted their classic to run on some sort of electrified drivetrain.

The respondentsB次元官网网址� top three reasons for converting their vehicles were for faster acceleration and improved performance, for a fun and challenging project, and because of environmental and emissions concerns. About 25% of respondents said they approve of classic vehicles being partially or fully converted to EVs.

B次元官网网址淓lectric vehicles deliver some pretty astonishing performance just by the nature of the mechanics of how they work,B次元官网网址� Klinger said. So itB次元官网网址檚 not surprising to him that a small percentage of people converting classic cars to EVs are interested in improving performance. He compared the current trend to the hot-rod movement of the 1950s.

But Klinger, who owns several vintage vehicles, said he doesnB次元官网网址檛 think electric motors will replace all internal combustion engines B次元官网网址� especially when considering historically significant vehicles.

B次元官网网址淭hereB次元官网网址檚 something satisfying about having a vintage car that has a carburetor,B次元官网网址� he said, because itB次元官网网址檚 the same as when the car was new. Some enthusiasts want to preserve the sound and rumble of older carsB次元官网网址� original engines.

Other barriers to converting cars include the knowledge it takes to delve into such a complicated project, as well as safety concerns about tinkering with high-voltage components, the availability of parts, and the time it takes to realize a positive, environmental impact. Because classic vehicles are driven for fewer than 1,500 miles (2,414 kilometers) a year on average, it takes longer to offset the initial carbon footprint of manufacturing the batteries, Klinger said.

And then thereB次元官网网址檚 the price.

Sean Moudry, who co-owns Inspire EV, a small conversion business in suburban Denver, recently modified a 1965 Ford Mustang that was destined for the landfill. The year-and-a-half-long project cost more than $100,000 and revealed several other obstacles that underscore why conversions are not B次元官网网址減lug-and-playB次元官网网址� endeavors.

Trying to pack enough power into the pony car to B次元官网网址渟moke the tires off of itB次元官网网址� at a drag strip, Moudry and his partners replaced the underpowered six-cylinder gas engine with a motor from a crashed Tesla Model S. They also installed 16 Tesla battery packs weighing a total of about 800 pounds (363 kilograms).

Most classic vehicles, including the Mustang, werenB次元官网网址檛 designed to handle that much weight B次元官网网址� or the increased performance that comes with a powerful electric motor. So the team had to beef up the carB次元官网网址檚 suspension, steering, driveshaft and brakes.

The result is a Frankenstein-like vehicle that includes a rear axle from a Ford F-150 pickup and rotors from a Dodge Durango SUV, as well as disc brakes and sturdier coil-over shocks in the front and rear.

Although Ford and General Motors have or are planning to produce standalone electric B次元官网网址渃rateB次元官网网址� motors that are marketed to classic vehicle owners, Moudry says itB次元官网网址檚 still not realistic for a casual car tinkerer to have the resources to take on such a complicated project. Because of this, he thinks it will take a while for EV conversions to become mainstream.

B次元官网网址淚 think itB次元官网网址檚 going to be 20 years,B次元官网网址� he said. B次元官网网址淚tB次元官网网址檚 going to be a 20-year run before you go to a car show and 50 to 60% of the cars are running some variant of an electric motor in it.B次元官网网址�

But that reality could be coming sooner than expected, according to Mike Spagnola, president and CEO of the Specialty Equipment Market Association, a trade group that focuses on aftermarket vehicle parts.

He said that during SEMAB次元官网网址檚 annual show in Las Vegas this fall, some 21,000 square feet (1,951 square meters) of convention space was dedicated to electric vehicles and their parts. That was up from only 2,500 square feet (232 square meters) at the 2021 show.

Companies are developing universal parts, as well as lighter, smaller and more powerful battery packs. TheyB次元官网网址檙e also creating wiring components that are easier to install and myriad other innovations. Some are even building vehicle frames with the electric motor, batteries and components already installed. Buyers can just install the body of a classic vehicle on top of the platform.

B次元官网网址淭he early adopters of this would take a crashed Tesla and pull the motor and harnesses and batteries and all that out of the vehicle and find a way to shoehorn it into whatever vehicle they wanted to build,B次元官网网址� Spagnola said. B次元官网网址淏ut today there are many manufacturers now starting to make components. B次元官网网址� WeB次元官网网址檙e really excited about it.B次元官网网址�

B次元官网网址擳homas Peipert, The Associated Press