Archives: Bob’s Blog

Bob’s blog.

Team Boddie @ Sacramento Raceway Aug. 9 & 10, 2019 event announcement

Team Boddie promod drag racing; again at Sacramento Raceway. on Friday, August 9 during Tune & Test and on Saturday, August 10, 2019. Air Density / Density Altitude / Grains of Water for racing engine tuning from ADO Air density, track MAP LOCATION: https://airdensityonline.com/track-results/Sacramento_Raceway/ Air Density METRIC units, MAP LOCATION: https://airdensityonline.com/track-results-metric/Sacramento_Raceway/ Air density FORECAST: https://airdensityonline.com/track-forecast/Sacramento_Raceway/ […]

Recent articles

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 to Engine Tuning

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 […]

Is it still important to read spark plugs and what’s the best method of doing so

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 […]

What’s the best way for a racer using a carburetor to optimize engine performance?

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 […]

Optimum Air/fuel ratio

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 […]

Is ignition timing the first thing a tuner should dial in?

For a new setup, a conservative ignition timing value should be the first thing a tuner should dial in.   Other setups, including the fuel system and the chassis, should be optimized before the timing is extended beyond a conservative value for more performance.  The amount of timing depends on the strength of the ignition.  For […]

‘How-to’ fuel injection jetting videos

Video: How to set up fuel injection jetting in a ProCalc calculator A baseline is the default jetting setup.  It is the starting point for tuning for air density changes at a subsequent race.  It may also be the starting point for a new FI setup. ProCalc provides an easily retrievable record for precise numerical […]