[Shaggy]

My expierence is Yes elevation can effect et big time but on the flip side using the conversion formula to correct it to sea level is about as accurate as calculating you ET and MPH off of your 1/8 mile time. It will give you a general idea of what you would run but it is not a truely exact science because all acrs respond a little different to the elevation just like not all cars accelerate the same between the first 1/8 to the second 1/8.. a good example is my falcon it runs a 13.29 1/4 @ 100.00 but if you take my 1/8 8.43 @ 82.34 I should have run a 13.15 @ 103 according to the analyzer here(which is closer then when i do the math on the street because i just use the old stand by of multiplying it by 1.5 in my head). I wish my car could MPH 103 the best if has ever done is 100.15 and it has only broke 3 digits about 4 times the rest of the time it is a solid 99 MPH car. Anyway back to the point It is close but not perfect.