Our automotive technical and reference resources are here to make your life easier and to help you find answers faster. From decimal/fraction charts to interactive calculators; from quick look-ups and cross-reference tools to general automotive information and videos to guide you through…
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Technical Articles
References, Charts, and Part Identification
Math, Conversions, and Equivalents
- Automotive Math Formulas and Conversions
- Decimal Equivalents of Common Fractions
- Equivalent of Wire and Sheet Metal Gauges in Inches
Part and Vehicle Identification
- Axle Flange Housing Identification
- Differential Identification Chart
- Early Ford Beam Axle Identification and Dimensions
- Popular Automatic Transmission Identification Chart
- 1902-2007 GM Vehicle Specification Sheets
- 1946-53 American Classic Car Technical Sheets
- Classic Vehicle Identification Sheets
Engine
- Alternator Wire Gauge Size Chart
- Calculate the Size of Carburetor Needed in CFM
- Connecting Rod Ratios
- Firing Orders, Distributor Location, Rotation Direction
- LS Engine Specifications and History
Transmission
- Popular Automatic Transmission Identification Chart
- Popular Automatic Transmission Dimensions
- Popular Manual Transmission Dimensions
- Transmission Gear Ratio Chart
- Transmission Cross Reference
Sizing and Dimensions
- Old Tire Size Guide: Radials, Poly/Fibers, Bias-Ply’s, Cheater & Drag Slicks
- Rear-End Widths of Classic American Cars
- Wheelbase Measurement Cross-Reference
- Wheelbase Measurements for Popular Classic Cars
- Wheel Bolt Pattern Cross Reference
- Early Ford Beam Axle Identification and Dimensions
- Popular Automatic Transmission Dimensions
- Popular Manual Transmission Dimensions
- Popular V8 Engine Swap Dimension Chart
Hot Rod Glossary, Terms
Calculators
- Calculate the Size of Carburetor Needed in CFM
- Differential Gear Ratio Calculator
- Engine Displacement Calculator
- Engine Compression Ratio Calculator
- Horsepower Gain from Additional Blower Pressure Calculator
- Speed Potential Calculator for Ring Gear and Pinion Changes
- Tire Change / Speedometer Change Calculator