Links to free air density tuning info for IHRA drag racing at the following:
Darlington Dragway, Hartsville, SC, (843) 383-0008; Team Bracket Finals; Sept. 11-15, 2019; as well as other events throughout the month;
map location, track elevation, air density, density altitude, grains, forecast, historic, & metric data for “good spark plug readings”:
https://airdensityonline.com/track-r...ngton_Dragway/
US 131 Motorsports Park, Martin, MI, (269) 672-7800; Thunder Team Finals; Sept. 12-15, 2019; as well as other events throughout the month;
map location, track elevation, air density, density altitude, grains, forecast, historic, & metric data for “good spark plug readings”:
https://airdensityonline.com/track-r...orsports_Park/