i've noticed more and more lately how people mention that they ran xx.xx and then after their number they'd say that it was at 1000 ft above sea level (or so, just picking an arbitrary number) what is the correction ratio/percentage (whatever) to calculate your time at sea level if you were running them at 1000ft above sea level

 

i think nhra says you gain 1mph for every 1000 feet.

 

ding ding ding....what do we have for him johnny?

i wish I would memorize all the ****!

 

from NHRA - correct altitude back to sea level
alt. et mph alt. et mph
1300 .9861 1.0143 1400 .9848 1.0157
1500 .9835 1.0171 1600 .9822 1.0185
1700 .9809 1.0199 1900 .9783 1.0227
2100 .9757 1.0255 2300 .9731 1.0283
2700 .9679 1.0339 2900 .9653 1.0367
3000 .9640 1.0381 3500 .9575 1.0451
3700 .9549 1.0479 4100 .9497 1.0535
4400 .9458 1.0577 4600 .9432 1.0605
4800 .9406 1.0633 4900 .9393 1.0647
5100 .9367 1.0675 5800 .9276 1.0773

Note: For n/a cars only - turbo correction is less

 

Nice cut and paste Elevation Sucks!