Box Blower Engines
Surge, Boost, Power. Repeat.
There is nothing like the sound of a blower engine cruising the street or hitting the track.
Blower engines deliver the kind of raw, instant horsepower that serious enthusiasts crave. At Box Performance, we specialize in building and tuning high-performance supercharged engines that are built to dominate the street or strip. Whether you’re looking for a classic roots-style blower engine or a custom setup for your race car, we use top-tier parts and proven techniques to ensure maximum boost, throttle response, and durability. We have decades of experience crafting performance engines with aggressive power and unmistakable sound only a blower can deliver.
The Boxvette Started it All
At Box Performance, we don’t just build blower engines—we live blower culture.
We’re the House of Surge, known for delivering the lope, the chop, and the unmistakable idle surge that only a finely-tuned Roots-style blower can produce. It all started with the Boxvette—a blown 1965 Corvette that helped define our brand with raw horsepower, race-ready street manners, and a sound that stops traffic. That signature surge isn’t just noise—it’s proof of precision. Whether you want a streetable 6-71 setup or a fire-breathing 14-71 dragstrip build, we know how to tune blower engines for performance and attitude.
Street vs. Track: Choosing the Right Blower Setup
What Blower Engine is Right for You?
Blower engines vary widely depending on application, but they all start with one goal: moving air fast. For street-driven performance, a 6-71 or 8-71 blower on a small- or big-block engine (typically 350–540ci) delivers 6–12 PSI of boost, excellent throttle response, and that classic idle surge—without sacrificing drivability. These builds pair well with forged internals, blower-specific cams, and fuel systems tuned for 93 Octane with Octane Booster* or E85.
For track builds, larger units like 10-71 or 14-71 blowers on 500+ ci engines unlock serious airflow potential. With high-octane race fuel or methanol and full forged rotating assemblies—including billet cranks, aluminum rods, and custom blower cams—these combos can push well beyond 1,500–2,000 horsepower. They’re built to dominate the 1/8th or 1/4 mile while still turning heads in the pits with that unmistakable surge and whine.
Blower Engine Size and Application Guide Chart
| Blower Size | Engine Paring | Boost Range | Fuel Type | Best Use | Notes |
|---|---|---|---|---|---|
| 6-71 | A Small Block Engine or a Smaller Cubic Inch Big Block | 6-8 PSI | 93 Gas + Octane Booster /E85 | Street Cruiser | Iconic street look & surge |
| 8-71 | Small Block & Big Block Engines. (400–540ci) | 8-10 PSI | 93 Gas + Octane Booster /E85 | Street & Weekend Warrior | Great balance of power & drivability |
| 10-71 | Stroked Big Blocks (500–565ci) | 10-15 PSI | Race Gas/ E85 | Street, Racing | Higher Maintenance and Expense |
| 14-71 | Stroked Big Blocks (500+) | 10-20 PSI | Race Gas /E90 Ignite Ethanol & Methanol | Racing | High Maintenance & Expense. |
*Notes:
- We recommend forged internals for all Blower applications.
- For street cars, 6-71 and 8-71 blowers offer manageable temps, reliable power, and less strain on parts.
- For serious street & racers, 10-71 and 14-71 setups deliver extreme power but need advanced tuning, cooling, and fuel systems.
- Always match blower size with compression ratio, cam specs, and intended use to avoid detonation or poor drivability.
- For best engine performance discuss your vehicles current fuel, cooling and ignition systems with your engine builder to make sure they can support a blower engine.
- Pump gas is never enough for a performance engine. Octane booster can help you increase octane levels without the high cost of race gas. But not all octane boosters are created equal. Some Brands do not raise the octane enough to prevent detonation. We recommend the following brands like Torco Accelerator, Boostang, Green Trail Accelerator
Box Blower Engine FAQs
Q: What's better: Roots blower or Procharger for the street?
A: A Roots blower delivers instant boost and torque off idle, making it a favorite for street use. A Procharger offers better efficiency at higher RPMs.
Q: How much boost can a stock block handle?
A: We build all of our boosted builds with forged internals. Most stock blocks are safe up to about 6–8 psi of boost but forged internals are better.
Q: How much horsepower gain from a supercharger?
A: A properly sized supercharger can add 150–300+ horsepower, depending on boost level and engine setup.
At Box Performance, we build blower engines that deliver more than just boost—they deliver results.
Whether you're looking for streetable power or all-out race performance, our supercharged engine builds are tailored to your goals with precision, experience, and premium components. From Roots-style blowers to full custom setups, every engine is hand-built, dyno-tested, and backed by decades of proven performance. When you're ready to step up to serious boost, we're ready to build it.
Ready to Feel the Surge?
Get a custom blower engine built for serious street and strip action.