Whipple LS Crate Engine From BluePrint Engines Hits 855 HP

Caecey Killian August 25, 2026 4 min read 0

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BluePrint Engines just gave every LS builder chasing serious horsepower a new reason to open the checkbook. The company’s new Whipple LS crate engine lineup pairs the proven Gen 6 3.0L Whipple twin-screw supercharger with two displacement options, and the numbers land right where a street/strip build wants them. We have covered BluePrint’s LS lineup before, including their 427 LS engine that cranked out 830 horsepower, and this new Whipple package pushes the ceiling even higher while keeping the turnkey convenience that made the brand a go-to for builders who want to drop in a finished powertrain and drive.

What Makes The Whipple LS Crate Engine Different

The short answer: BluePrint bolts a Gen 6 3.0L Whipple twin-screw supercharger onto its LSX-style block instead of leaning on stock displacement or aftermarket turbo plumbing to get the power up. Twin-screw blowers build boost low in the rev range, so the throttle response feels immediate instead of laggy, and that matters more on a street car than a dyno sheet ever will.

Positive-displacement blowers like the Whipple make their power the same way a mechanical fuel pump makes pressure, by moving a fixed volume of air per revolution instead of spooling like a turbo. That is why a Whipple-blown small block idles clean and pulls hard from off idle instead of waiting for boost to build.

Builder Series And Pro Series Power Numbers

Two displacement options anchor this Whipple LS crate engine lineup, and both give a clear jump over BluePrint’s naturally aspirated LS engines. The 376 c.i. version makes 700 horsepower and 640 lb-ft of torque, and the 427 c.i. version tops out at 855 horsepower and 810 lb-ft, both figures backed by factory dyno testing.

We covered BluePrint’s Builder Series 427 LS engine that cranked out 830 horsepower last year, and this Whipple-blown 427 edges past that number while adding the low-end torque a positive-displacement blower is known for. For a builder cross-shopping displacement, the 376 keeps things closer to a stock LS3 footprint while the 427 leans into the big-inch approach BluePrint has built its reputation on.

Block, Rotating Assembly, And Cylinder Heads

Underneath the supercharger sits BluePrint’s LSX-style high-strength cast-iron block, built with extra deck thickness and reinforced main webbing to handle the added cylinder pressure boost brings. A forged crankshaft and forged pistons round out the rotating assembly, and the six-bolt main design with priority main oiling keeps oil where it needs to be when the RPMs climb.

On top, BluePrint’s LS3 aluminum heads and a hydraulic roller cam tuned for street and performance duty finish out the short block into a running engine. None of the internals inside this Whipple LS crate engine are exotic, they are chosen for repeatable durability under boost, which is a bigger deal for longevity than any single spec on the sheet.

Holley Terminator X Max EFI And Tuning

Every Whipple LS crate engine in this lineup ships with Holley’s Terminator X Max EFI system already wired to the supercharger and tuned as a package instead of left for the builder to sort out. The self-learning fuel-map technology adjusts as the engine breaks in, and the built-in data logging means whoever tunes it later has real numbers to work from instead of guesswork.

That matters because boosted combinations are the ones most likely to get hurt by a bad tune. Having the ECU and supercharger matched from the factory takes one more variable off the table before the engine ever sees a trailer.

Transmission And Accessory Drive Options

Builders speccing a Whipple LS crate engine who want a complete powertrain instead of a stand-alone engine can option either a 4L80E four-speed automatic or a T56 six-speed manual behind the engine, and the front accessory drive comes in natural or black finish depending on the look of the build.

BluePrint has leaned into complete powertrain packages before, including the 376 LS3-style crate engine it paired with a ZF-8 automatic transmission, a combination that won Best Hot Rod Product of the Year at SEMA. Bolting proven transmission options behind a new engine platform is not new ground for the company.

What This Lineup Means For Your Next Build

For anyone planning a pro touring build, a weekend drag car, or a street machine that needs real power without a custom fabrication bill, this Whipple LS crate engine lineup gives a dyno-proven starting point instead of a parts list to chase piece by piece. The 376 makes sense for a driver who still wants to see decent highway mileage, and the 427 is the one to call if the build is headed for the strip more often than the grocery store.

Either way, the engine shows up matched, tuned, and ready to bolt into a chassis instead of leaving that work for someone’s garage floor.

AboutCaecey Killian

Caecey Killian covers builds, installs, and product features for Car Junkie Magazine. He has spent years on the floor of the garage chasing horsepower across SBC, LS, and modern muscle platforms, and that shop time runs through every article he writes. His current CJM project is Project Street Reaper, a 1976 Camaro built around a fresh SBC 350. He is also known for Project Mighty Mouse, a 1977 Chevy Nova running a 1962 small-journal 327 SBC, with build coverage published across multiple online automotive magazines. His media background spans long-form build documentation, install coverage, and product features across the magazine and the Car Junkie Magazine YouTube channel. He writes the way he wrenches: specific, honest about the mistakes, and grounded in real garage work.

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