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The Horsepower Monster wraps up its three-part documentary on reviving a genuine Chrysler 426 Hemi — the engine Mopar fans still call the ‘Elephant’ — with the moment every rebuild ultimately comes down to: a dyno pull. After months of teardown, machining, and reassembly on one of the rarest engines Detroit ever built, the crew finally finds out whether their work paid off. The full dyno sheet is published alongside the video for anyone chasing the exact numbers.
Hagerty’s Stefan Lombard stands beside a documented 1970 Dodge Challenger R/T from the Lingenfelter Collection to show buyers exactly what separates a real numbers-matching car from an expensive clone. The guide covers fender tags, VIN decoding, common rust spots, and why only 137 R/T Hemi hardtops left the factory with the pistol-grip four-speed. It’s the same checklist serious collectors use before writing a check on a fifty-year-old muscle car. Watch to see what most buyers miss.
David Freiburger’s on-camera shout of “Thermoquad!” during Roadkill’s General Mayhem build turned an obscure Carter carburetor into a legend — but few people actually know what makes one different. This Roadkill Extra breaks down the spread-bore design, the unusual plastic float bowl built to fight heat, and exactly why Freiburger called it the carburetor that “punishes” careless drivers. It’s a deep dive into a piece of Mopar hardware most fans only know as a punchline. Watch to finally learn the mechanics behind the meme.
Every carbureted muscle car ever built ran on a fuel-delivery system with no computer, no sensors, and no electric pump doing the metering — just air pressure exploiting simple physics. This explainer breaks down exactly how a venturi, float bowl, and calibrated jets work together to keep an engine fed at idle, cruise, and wide-open throttle. It’s the same principle behind every Holley, Quadrajet, and Thermoquad ever bolted to a big-block. Watch to see why a technology this simple ran the automotive world for most of a century.
Holley’s carburetor selection guide tackles the argument every muscle car owner has had at least once — what size carb actually belongs on this engine — with real CFM math instead of bigger-is-better folklore. The video breaks down why oversizing kills drivability, how vacuum and mechanical secondaries serve completely different kinds of builds, and where street and race carburetors part ways. It is aimed squarely at classic muscle cars and daily-driven builds. Watch the full guide before your next trip to the parts counter.
Most owners of a 396-badged Chevy big-block have no idea their engine actually displaces 402 cubic inches, a quirk left over from a 1970 bore change Chevrolet never bothered to rebadge for. This full assembly walkthrough builds one from the ground up, torque spec by torque spec, and has already inspired at least one viewer to finally tackle a big-block sitting untouched since 1988. Watch to see exactly how it comes together.
At SEMA, Fullboost’s Luke tracked down Johnathan Goodwin to find out how his “electronic supercharger” — a battery-and-motor bolt-on that boosts power without hurting fuel economy — actually works, bolted to a 1957 Pontiac instead of the Hummer it had quietly been tested in months before. The same hot rodders who usually chase cubic inches were suddenly asking about kilowatts. Watch to see exactly how the E-Charger fills a turbo’s torque gap.
When Chrysler’s 6.4-liter HEMI SRT V8 launched, it used a pushrod layout that critics considered outdated — and still made 470 naturally aspirated horsepower across the Charger, Challenger, 300, and Jeep Grand Cherokee SRT8. Chief engineer Gary Rogers explains the engineering decisions behind the numbers directly in this Insider Interview. Watch to understand why an ‘old’ engine architecture kept winning arguments it wasn’t supposed to win.
Carburetor or fuel injection — which one actually makes sense for your build? Summit Racing’s Dave breaks down 2-barrel, spreadbore, and race carburetors against modern EFI, and the comments below are full of real builders working through the same decision on their own cars. Watch to see where the technical trade-offs actually land.
A small-block Chevy engine builder with decades of grease under his fingernails sets out to settle one of the hobby’s oldest arguments: which factory cylinder heads are actually worth chasing, and which ones are budget-build traps. Casting numbers, camel-hump chambers, and a warranty-replacement secret tied to the 1969 Z/28 Camaro all make an appearance. Viewers with their own engine-building histories have kept the debate going in the comments for over a decade. Watch to find out which heads made his list, and which ones did not.
A Ford 351 Windsor and a Chevy 350 small block landed on the same Engine Masters dyno, and the numbers that came back were close enough to reignite a fifty-year argument. Freiburger, Dulcich, and Steve Brule ran both engines through identical pulls, and the horsepower gap came down to single digits. Viewers are still arguing about who actually won. See how close it really was.
The Fab Forums picks up a die grinder and starts reshaping a stock intake manifold’s runners in real time, explaining exactly why port-matching — not just polishing things smooth — is the technique that actually adds power. It’s raw, unscripted shop footage rather than a polished tutorial, showing the kind of decision-making that separates a home porting job that works from one that just looks like it should. Watch the process unfold bit by bit.
What started as a simple video about a new valve spring compressor turned into a full first-time rebuild of a Ford Coyote V8 cylinder head. The creator, working through his very first engine rebuild on camera, doesn’t hide the parts that went sideways — including footage lost during the grinding and cleaning stages. It’s an unfiltered look at what a Coyote head rebuild actually demands from someone learning as they go. Watch to see a first attempt handled with real honesty.
Hagerty’s Redline Rebuild team tears down and rebuilds a Ford Flathead V8 pulled from a 1946 Ford pickup, an engine that had already logged more than 4,000 miles as part of the network’s Swap to Street build before earning a proper rebuild. Six days of work and more than 40,000 photographs get compressed into a fast-moving time-lapse that shows exactly what it takes to bring one of the most important engines in American automotive history back to full strength. Watch to see the flathead get the treatment it’s earned.
This walkthrough of rust-prone spots on 1970-81 Camaros and Trans Ams has quietly become a reference tool, with commenters crediting it for real purchase decisions years after it was posted — one used it to vet a supposed barn-find ’81 turbo Trans Am, another wishes he’d seen it before trading a clean Buick Riviera for a rusted ’72 Firebird. Produced by F-body parts specialist Fbodywarehouse.com, the guide goes panel by panel through exactly where these cars fail first. Watch the full guide before you go look at your next F-body.