Archives: fuel injection jetting calculator

USAC West Coast Sprint Season Feb. 27-28

Check airdensityonline weather, las vegas for yesterday, current, and forecast air density for tuning; track map; elevation; water grains; wind direction; wind speed; weather forecast; data displayed in Imperial or metric units; air density data valuable for racers without portable weather stations; for racers with portable weather stations, data valuable for re-calibration, especially after a […]

NHRA Wild Horse Motorsports preseason testing

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

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 […]

Testimonials

Recently we’ve gotten some positive feedback we wanted to share: “Thank You for the prompt reply and formulas you provided, now onward…….. Just want to tell you how much your books helped me in the tuning area. The reading was technical but interesting and informative. I found myself reading each chapter twice before moving on […]

Fuel Injection Jetting: More Power

Pro-Calcs, our on-line MFI jetting calculator, was upgraded: 1. nitro methanol fuel mixtures; Pro-Calcs will determine jetting for nitro additions to meth’l from 0 to 100%; by volume or weight; also procedures for E85 and for gas. 2. correction to data conflicts from various jetting combinations 3. jetting printouts in CVS format to down-load into […]

More Info on Pro-Calcs

Pro-Calcs, our on-line FI jetting calculator, was expanded for nitro methanol fuel mixtures.  The % of nitro mixture with methanol can be added.  The nitro mixture % can be entered by weight or by volume.  Pro-Calcs will determine the correct amount for the air to fuel ratio.  Our Nitro book explains the difference between the […]