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Speedmaster introduces its Chevy Gen V LT1 Downdraft 8 Stack EFI Intake Manifold System at the 2023 SEMA Show - a fully polished system that pairs classic Weber-style induction with contemporary electronic fuel injection.

Speedmaster's polished 8-71 Blower Shop supercharger was featured in the October issue of Super Chevy magazine, as part of a blown 540 cubic inch big block combination.

In the fourth instalment of the 5.0L Fistfight series, both the Ford 302 and Chevy 305 receive TorqStorm centrifugal superchargers. The Ford produces 619 hp, but the Chevy's stronger block may tell a different story long-term.

Speedmaster's 540-inch Chevy big block project, producing 939 horsepower with boost and nitrous, was featured in the August 2017 edition of Performance Racing Industry Magazine alongside coverage of power adders, header designs, and technology previewed for PRI 2017.

A back-to-back dyno test on a 350 Chevy Street Stock motor demonstrates that average power across the usable rpm range matters more than peak numbers, and that properly sized 1 5/8-inch Speedmaster headers deliver measurable torque gains from 3,000 to 5,400 rpm.

Richard Holdener puts the BluePrint Engines 540 big-block Chevy through a progressive boost test using a Speedmaster 8-71 supercharger kit, reaching 939 hp and 866 lb-ft of torque at 11.1 psi.

The Speedmaster El Rayo Ignition Combo Kit pairs an ignition amplifier with matched components for the small block Chevy, delivering a direct upgrade path for builders seeking consistent spark energy and improved combustion efficiency.

The Speedmaster downdraft system for small block Chevy produced 401 horsepower on the dyno, tested by Richard Holdener. The video covers the full dyno session and results.

The Speedmaster Side Draft EFI System for the Chevy LS3 combines individual throttle body design with electronic fuel injection, producing 546 HP and 520 ft-lbs of torque. The system earned a 2015 SEMA Award for its engineering and design.

A complete top end kit for the Big Block Chevy, tested on the dyno by Richard Holdener. The Speedmaster kit delivers over 100 horsepower in a single bolt-on upgrade.

Speedmaster puts its blower components through a side-by-side shootout on a Small Block Chevy. The test measures real output differences between supercharger setups on the same engine.

A Gen VI 454 pulled from a wrecking yard produced 369 hp in baseline trim. After installing Edelbrock RPM 454-O aluminum heads, a Performer RPM Air Gap intake, and a COMP XR271HR12 hydraulic roller cam, output climbed to 481 hp and 527 lb-ft of torque.

Speedmaster developed an aluminum small-block Chevy engine block that reduces weight over cast iron, accepts a 4.155-inch bore, and addresses common factory tolerance issues in lifter bores and oiling systems.

Starting with a recycled two-barrel 350 producing 246 hp, this dyno test walks through three distinct power phases, each built on deliberate component choices. The final combination reached 543 hp at 6,900 rpm from 355 cubic inches.

Starting at 388 hp, a Speedmaster 383 stroker gained nearly 100 horsepower through three targeted upgrades: CNC-ported heads, a more aggressive cam, and a single-plane intake. Each swap shifted the torque curve higher in the rev range, illustrating the direct relationship between component selection and where an engine makes its power.

A Gen VI 454 pulled from a salvage yard produced 370 hp in baseline form. Tested with four successive power-adders, the junkyard big-block reached 832 hp and 866 lb-ft of torque on twin turbos at 12.3 psi.

We pulled a running small block from a wrecking yard for under $300, baselined it at 312 hp on the dyno, and then upgraded the heads and cam to reach 420 hp and 415 lb-ft of torque - all on the original short block.

The factory-rated 365-hp L76 327 and the truck-duty 5.3L LM7 are separated by decades of engineering evolution but share nearly identical displacement. We ran both on the dyno in stock and modified configurations to see where the numbers actually land.