View Cart - Checkout

ENGINE Pro - Professional version of ENGINEjr. Many more details and recommendations to help you get the ultimate in HP and torque from your engine! Years of research, 100's of dyno tests, and 3 NHRA Competition Eliminator National Records later . . . this is the only "racer proven" software for the serious engine builder - $149 More Info
Add to Cart - Software - Book - Software & Book

FOURLINK - The "original" software for rear suspension analysis. Contains a simple 5-step process to correctly set-up your complete four link rear suspension system, including shocks and springs. Find the optimum four link bar combination on your PC, before you ever go to the dragstrip to test - $79 More Info
Add to Cart - Software - Book - Software & Book

CLUTCH Pro - Professional clutch management software for Pro Stock Cars and Trucks. Also includes most Alcohol class and Competition Eliminator style clutches! Find the best clutch setup (base, counterweight, ring height, etc.) on your PC and stop testing setups that just won't work for your specific combination - $199 More Info
Add to Cart - Software - Book - Software & Book

Clutch Pro Motorcycle -
Add to Cart - Software - Book - Software & Book

QUARTER Pro - Professional version of QUARTERjr. Ideal for Pro Stock Cars, Trucks and Bikes, and Competition Eliminator, Modified, Super Stock, etc. - or any drag racer with engine dyno data. Loads of graphs and printed output, just like from an onboard data recorder - $79 More Info
Add to Cart - Software - Book - Software & Book

DENSITY - The "ultimate PC based" weather station software. Works for any combinations of weather instruments and for every form of motorsports - drag racing, circle track racing, land speed racing, etc. Build your own weather station using this software - $49 More Info
Add to Cart - Software - Book - Software & Book

Bonneville Pro - Specially designed for the needs of land speed racers. Accurately predicts any vehicle's top speed, including one- and two-mile asphalt, El Mirage and Muroc dry lakes, and Bonneville Salt Flat short and long courses. Many graphs and detailed printed output - $79 More Info
Add to Cart - Software - Book - Software & Book


The math behind Quarter Jr's software is
now available in book form
Order a copy or 2 today!

About - Affiliate - Contact - Support - Package Deals
Share this page -