Dyno Vs.Drag Strip Testing

LOL.... so much wrong and things taken out of context. Ha! Trying to figure HP ratings using ET slip is just ballpark at best. And trying to use the dyno HP rating to figure the ET is just ballpark at best. If a guy swapped converters and dropped 4 tenths, how much HP did he gain??? << This example is why using ET slips to figure HP is skeptical at best.