THE GARAGE TOOLBOX

Measure twice.
Order once.

Transparent formulas. Instant estimates. A starting point for your build—not a fitment guarantee.

01 / FUEL & AIR

Carburetor airflow

473 CFM

CID × RPM × (VE ÷ 100) ÷ 3456. Naturally aspirated four-stroke airflow estimate; not a final carb selection.

Understand carb sizing ↗
02 / DRIVETRAIN

Highway engine RPM

2,193 RPM

MPH × axle × transmission × 336 ÷ diameter. Excludes converter slip and actual rolling-radius differences.

Understand gearing ↗
03 / WHEELS & TIRES

Nominal tire diameter

27.99 inches

Wheel diameter + 2 × width × (aspect ÷ 100) ÷ 25.4. Nominal size; does not establish clearance, load rating or wheel compatibility.

Formula reference: Holley / Mr. Gasket hot rod calculator instructions. Confirm component limits with their manufacturers.