Archives: Bob’s Blog

Bob’s blog.

NHRA Pomona Winternationals Drag Racing 2019

Posted on by Bob

Read those spark plugs for good air density tuning at the NHRA Pomona Winternationals; Feb. 7-10, 2019. Check https://airdensityonline.com/track-results/Auto_Club_Raceway_at_Pomona/ for current air density, density altitude, water grains, temperature, humidity, uncorrected barometer, wind speed, wind direction, dew point, saturation pressure, vapor pressure in imperial or metric units. Check https://airdensityonline.com/track-history/Auto_Club_Raceway_at_Pomona/ for yesterday’s record. Check https://airdensityonline.com/track-forecast/Auto_Club_Raceway_at_Pomona/ for tomorrow’s […]

NHRA Wild Horse Motorsports preseason testing

Posted on , updated on by Bob

Read those spark plugs for good NHRA drag racing preseason tuning; check https://airdensityonline.com/track-results/Wild_Horse_Pass_Motorsports_Park/ for current air density, density altitude, water grains, temperature, humidity, uncorrected barometer, wind speed, wind direction, dew point, saturation pressure, vapor pressure in imperial or metric units; yesterday’s record  and tomorrow forecast  already determined in air density units.  Check https://airdensityonline.com/free-calcs/ for free […]

Impulsing the fuel injection fuel curve

Posted on , updated on by Bob

We are seeing racers from time to time who open and close a fuel injection bypass to pulse the fuel curve.  According to our numerical analysis of air to fuel ratios from our ProCalc fuel injection calculator, bypass jet sizes much bigger than 0.050 inches are too large if they are shut off or on […]

Your racing engine blew up. Now what do you do?

Posted on , updated on by Bob

After that, you repair all the mechanicals that are broken. You review what went wrong. You revise your tune-up to try to avoid it again. For fuel system adjustments, try precise numerical control over tuning using air/fuel ratio! Without knowing it, this is something you already do: When you adjust fuel injection jetting from plug […]

Good Fuel Pressure with a New MFI System

Posted on , updated on by Jennifer

Setting up a new MFI fuel system: main bypass adjustment to control the air to fuel ratio adjustment of the combination of the main bypass and nozzle sizes to maintain an optimum fuel pressure range from the lowest to highest engine RPM. Changing the main bypass jet for tuning affects the air to fuel ratio […]

Solutions to Idle Lope in Mechanical Fuel Injection

Posted on , updated on by Bob

Customer Inquiry One of our customers recently inquired about idle lope in his funnycar dragster.  ‘What can I do to minimize idle surge on our funny car?  It’s difficult to stage at the starting line.  It has a Bruno (torque converter), Lenco transmission, Enderle Bird Catcher fuel injection hat, Enderle K type barrel valve with […]

Rons Low Cost Throttle Body Fuel Injection CFM & HP Capabilities

Posted on , updated on by Bob

Rons Fuel Injection has provided us with air flow data for their throttle body setups.  We analyzed the power potential of these simple and very popular fuel injection systems. Racing engine size capabilities were determined at the flow CFM numbers provided by Rons Fuel Injection.  For 100% air density, horsepower capabilities were also determined. Rons […]