Link to free air density tuning info for drag racing at NHRA Mopar Nationals Drag Racing: Sept. 12-15;
Maple Grove Raceway, Mohnton, PA; (610) 856-9200;
Map location, air density, density altitude, grains, forecast, historic, & metric data "for good spark plug readings":
https://airdensityonline.com/track-r...Grove_Raceway/