Private question came up "Why is the MPH so high for no better ET than you are posting?"
Good question!! It is again because of the weight. Because the car is so heavy it takes far more HP to move it. So if it leaves at 1.2 60 foot times than it takes 400 HP more than a car that's even 1000 pounds lighter that also leaves at a 1.2 60 foot. That HP difference won't show up at the starting line because of the weight being much more. But when you get the weight moving that HP now shows up big time in the MPH at the other end of the track. So heavy cars will always need more MPH for the same ET a much lighter car requires. You do this long enough and I can almost tell you want a car weighs just by it's ET to MPH in a quarter mile. This is also why it will need to be in the 170's MPH to have any chance of even a high 7 in the Impala, because of it weighing almost 4600 pounds.
I'm a story guy and the best one I have to explain this was maybe the closest race I ever had. The other car was a 69 Camero with a big block and we were side by side the entire track until just about the 1000 foot make. All the sudden he just let off and I couldn't figure out why he did that. I had no idea why that was so you just go back to the pits and continue on. Soon enough a guy came over, that I did know, and said "you know that Camero you just ran, that was my uncle. As I started to tell him that was the best race I had ever had until he let off. He smiled and said "He didn't let off". My response was yes he did, he had to have!! He said his uncle came back and said " That dam Impala went 155 MPH" because he had the other side of the time slip. That was the best example of what happens when the other car runs out of HP or really torque. The power needed to move my much heavier car only makes it equal the lighter car until the much higher power takes over on the big end of the track. That's why the MPH is so high for the ET.
My joke has always been if you're not ahead of me at the 1/8 mile then your not going to catch me, that's been the case so far as I have never been passes in the big end of the track other than by a rail. And I still have hope at the 1/8 even if they are ahead of me because my power will show up. Guys got to have hope:).
Or could be labeled as more reasons not to run a heavy car!! I really don't like going that fast as I'm very aware of how bad it will be if anything goes wrong.