1/8 mile racing...

NHRA factors classes like 8.90, 9.90, 10.90 classes at events. At least they did years ago because at Quaker City in Ohio the index was like a 10.04 instead of 9.90 and they did this because some of the cars couldn’t cover the altitude change. Like mentioned above the proper way of posting your ET is in your case he ran a 12.20 at say 5200 foot altitude. Keystone (my home track) is between 1100-1200 foot altitude but with our given humidity we are usually 3200 foot plus on most months. I’ve raced in humidity over 90% quite often.