Blog
Guides on fuel systems, engine building, forced induction, and more.
Power-to-Weight Ratio: Why It Matters More Than Peak Horsepower
Why power-to-weight ratio is the best single predictor of acceleration, how to calculate it, where your car sits relative to common benchmarks, and whether to add power or subtract weight.
Weight Transfer in Drag Racing: How to Get More Traction at Launch
How weight transfer works during acceleration, what determines how much weight shifts to the rear, and how to use it to improve traction off the line.
Dyno Correction Factors: SAE, DIN, and STD Methods Explained
What dyno correction factors are, how SAE J1349, DIN 70020, and STD corrections work, why they exist, and how to compare dyno numbers across different conditions.
How Air Density Affects Engine Performance
Why hot, humid, high-altitude air costs you horsepower — how temperature, pressure, and humidity change air density, and what that means for naturally aspirated and turbocharged engines.
How Boost Pressure Translates to Horsepower
The relationship between turbo boost PSI and horsepower gain — why it's not linear, what efficiency has to do with it, and how to estimate boosted power from NA baseline numbers.
Speedometer Error After Changing Tire Sizes: How to Calculate and Fix It
How tire size changes affect speedometer accuracy, how to calculate the exact error, and the different ways to recalibrate your speedometer.
Quarter-Mile ET: How to Estimate, Measure, and Improve Your Drag Strip Time
How quarter-mile elapsed time and trap speed work, what determines your ET, and the most effective ways to go faster — from weight reduction to traction to power adders.
Exhaust Sizing Guide: How to Pick the Right Pipe and Header Size
How to size exhaust pipes and header primaries based on horsepower, why bigger isn't always better, and how exhaust flow affects torque and power curves.
Turbo Sizing 101: How to Choose the Right Turbo for Your Build
Learn how to pick the right turbocharger — compressor maps, A/R ratios, frame sizes, and how to match a turbo to your horsepower and displacement targets.
Spring Rate and Ride Frequency: Choosing the Right Springs
How to calculate the right spring rate from corner weight and motion ratio, what ride frequency means, and how to set up springs for street, autocross, or track use.
Gear Ratios Explained: How to Choose the Right Gears for Your Build
How gear ratios work, how to pick the right final drive and transmission gears, and how tire size affects your effective gearing. Covers street, drag, and road course setups.
Wheel Offset and Backspace: A Complete Fitment Guide
How wheel offset and backspace work, how to convert between them, what happens when you change width or offset, and how to avoid rubbing and clearance issues.
Cam Specs Explained: Duration, Lift, LSA, and Overlap Demystified
How to read camshaft specs — what duration, lift, lobe separation angle, and overlap mean, how they affect power, idle, and drivability, and how to choose the right cam for your build.
Piston Speed and Rod Ratio: What They Mean for Your Engine
How mean piston speed limits RPM, what rod ratio affects, and how to use these numbers when planning a stroker build or choosing an RPM range.
Compression Ratio Explained: How to Calculate, Measure, and Optimize
Everything you need to know about compression ratio — how to calculate it, how to measure it, and how to choose the right CR for your fuel, cam, and boost level.
Volumetric Efficiency Explained: What VE Means and Why It Matters
What volumetric efficiency is, how it's measured, what affects it, and why VE is the single best indicator of how well your engine breathes.
How to Size a Fuel System: Pump, Injectors, and Lines
A complete walkthrough of fuel system sizing — from calculating pump flow to choosing injectors and line diameter. Covers NA, turbo, and E85 builds.
Coolant Mixture Guide: Ratios, Freeze Points, and Common Mistakes
How to choose the right antifreeze-to-water ratio for your climate, what happens when the mix is wrong, and why coolant does more than just prevent freezing.
Understanding Air/Fuel Ratio: How to Read and Use a Wideband Gauge
What AFR and lambda mean, how to read a wideband gauge, target AFR ranges for idle, cruise, and WOT, and common mistakes that cause lean or rich conditions.
Bolt Patterns Explained: How to Measure and Match Wheels
How to identify your wheel bolt pattern (PCD), how to measure it with different lug counts, common bolt patterns by make, and what to know about adapters and hub-centric rings.
Choosing the Right Carburetor: CFM Sizing, Types, and Common Mistakes
How to pick the right carburetor for your engine — CFM calculation, vacuum vs mechanical secondaries, and the mistakes that kill performance.
Engine Displacement Explained: Bore, Stroke, and Why Size Matters
How engine displacement is calculated from bore and stroke, the difference between oversquare and undersquare designs, and how displacement affects power and torque character.
Tire Sizing Explained: How to Read Tire Sizes and What Changes Affect
How to decode tire size numbers, what happens when you change tire sizes, and how it affects speedometer accuracy, gearing, clearance, and ride quality.
Fuel Economy: What Actually Affects Your MPG
What determines your real-world fuel economy — driving habits, vehicle weight, aerodynamics, tire pressure, and maintenance. How to measure and improve MPG.