The accompanying charts are what the NHRA uses to convert e.t. and mph for varying track elevations. To convert your numbers to sea level equivalents, simply multiply the applicable factor by your e.t. and mph. For example, to convert a 12.00 at 112 mph pass at LACR with a 2,700 feet elevation, simply multiply 12.00 by 0.9692 and the 112 mph by 1.0339. The final conversion tells us that our high elevation pass would equate to an 11.63 at 115.80 mph pass at sea level.