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 […]
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 […]
as of 10/1/2018: Szabo Publishing racecarbook.com Bob Szabo PO Box 461 Rancho Cordova, Ca 95741-0461 (916) 400 3953
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 […]
ProCalc easier to use with new instructional videos. Save MFI tuning time with ProCalc. Check out youtube links on http://airdensityonline.com/pro-calcs/
Pro-calcs is our on-line fuel injection jetting calculator with 4 different jetting programs. You can now try it out for free for 30 days.
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 […]
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 […]