I went to the track today I only got to run three times, on my last run I had a great start, but I missed 2nd & 3rd the 60' was 2.148 10.186@ 66.31, what do you think my time would have been , I normally run a 9.50 @ 75, with a 2.3 60'.
Just take your 1/8 et and multiply it by 1.563. This equals a very close estimate to what you would get in the 1/4 and I always use 1/8 mph multiplied by 1.26 to get my 1/4. It is a close estimate. These numbers work for me.
1/8et X 1.563= 1/4 et
1/8mph X 1.26 = 1/4 mph
These are very close to the real thing.