If you can do a 12.62 with a 2.0, you would run a 12 flat with a 1.70 probably. You're making a lot more horsepower than I am, you're just not launching very well it seems. I am a little surprised at your 111mph, with 400HP I'd expect you to be hitting 118-120.
I could probably cut a 1.65 with a perfect launch, and that's on skinnier tires and a lot less HP.
Don't give so much weight to your 60 foot times bringing you down that much. It will help but its not going to pick you up a half a second or in this case 60 100ths.
In Richmond they prep the track fantastic. I stay in the 1.06 60" times with the dragster and I run 7 100s faster at that track than I do at my local track but its the prep work that makes the difference and its all the way down the track. If I get out the grove one little bit on my 1/8th mile local track I can spin the tires is a hurry so my et is bases on the complete run in Richmond ver North East Dragway my local track. Feels funky when your rear starts spinning over 100 mph.
At North East yesterday we had test and tune and spent the afternoon playing with the new computer on the car. High tech red neck here. LOL
My 60 foot at my local track where the prep is not so good is 1.09 but my top end and ET are only 7 100's apart. Funny but the speed is almost the same.
Everyone likes to think a little 60 foot would mean a lot of ET but in street cars if you pick up a quarter of a second your really on the money and lucky.
Something to is warming up of the car.
Very bad misconception that a car needs to be warm to make the most power and best run. Its actually the other way around.
You want the car about 100 degrees at the line. What happens when temps drop outside in the 50s and 60s ver 100's in summer . Your car runs faster.
Same with warming up the motor.
I run a duel fan Afco racing radiator where I can cool quick.
Heres you a little reading from the pros.
Tech Talk #55 – Keeping Cool | Reher Morrison Racing Engines