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Recently Bob and Jennifer contributed content for an online publication. The amount of information they needed was minimal but Bob and Jennifer decided to expand on the content and provide it for anyone who might benefit. Key elements to engine tuning Optimum Air/Fuel Ratio in drag racing Is Ignition Timing the First Thing to Dial […]
Key elements for drag race engine tuning are having a well-tested fuel system setup, tracking the weather for changes in the amount of oxygen in the atmosphere, and properly adjusting the engine for the current climate. One element specific to mechanical fuel injection tuning is idle adjustment for a good starting line temperature. Engine oil […]
Spark plug discolorations after a run are an accumulative indication of engine temperature. The spark plug plating discolorations after a run indicate the portion of the spark plug that experienced higher temperature somewhere on that run. Spark plug readings are most effective when a strong baseline is developed. If spark plugs are not discolored after […]
Testing for maximum 60 foot performance should be done first. Jetting, accelerator pump, transition circuits, float level, and/or fuel pressure adjustments should be done for this first phase of drag racing performance. After carburetor adjustments are done to optimize the 60 foot time, then further adjustments can be done for mid-range and high-end performance. Specific […]
For many classes and national events, both the fuel and often the fuel supplier is specified. In that case, there is no fuel choice. However, for many others such as local bracket racing gasoline setups, that is usually not the case. The selection of gasoline is first dependent on leaded or unleaded. Racecars driven to […]
How important is data-logging? Data-logging is most valuable if the data is analyzed and understood. Bob spent 5 years as a rocket scientist for General Dynamics Aerospace. There were 10 pounds of data for every pound of manufactured rocket metal. All that data was analyzed to fine tune the finished product. We am seeing the […]
Is there an optimal air/fuel ratio for drag racing engines? While air/fuel ratio is important for fuel system management, there is no one optimum air/fuel ratio. These depend on engine type, fuel type, and engine modifications. Below are examples of some optimum air/fuel ratios for specific drag racing engine examples: engine induction fuel air/fuel ratio […]
Combustion is between oxygen and fuel. The ratio of the two determines whether a mixture is best horsepower, best torque, rich, moderate, or lean. Air to fuel ratio (AFR), the basis for tuning with ProCalc, combines the weight of the air and the weight of the fuel. The air is only 23% oxygen by weight. […]
Event: Indianapolis 500 practice: May 14-17, 2019 Indianapolis 500 qualifying: Sat May 18, Sun May 19 Indianapolis 500 practice: Mon May 20 Indy 500 Miller Lite Carb Day: Fri May 24 Indy 500 Firestone Legends Day: Sat May 25 103rd running of the Indianapolis 500 high speed circle race: Sun May 26 links: current imperial […]
Getting Day Old and Past Air Density Data for Tuning After numerous requests, historic air density data was added to the track listed in airdensityonline.com. Now race tuners can retrieve past air density data for race tracks and courses all over the world. Here is an example of one of 23 racing facilities listed for […]