Here's another way way of looking at your numbers
You said you did a 7.9 100-120 (62-124mph for the rest of us)
That means you'd do about a 9 second 60-130 which is about right for a full bolton Mustang on e85
A stock DH thats running really well will go 10.1 or so
You're only up about 5 in...
It's tuned so they both make the same amount of power according to the tuners....same engine except better rods/pistons (which don't matter at NA levels)
Nobody said they add power. They free up power. Which the dyno sees as more power.
More power to move the car instead of spinning around parts. Not sure why this is so hard to understand.
If you're having heat problems on the track I don't think lowering the boost by 2psi is going to do much
The problem is you're making a couple hundred more HP than the cooling system was designed to handle
The question becomes does the larger pulley physically fit. Is it going to run into...
Can't really compare your Dark Horse as the ratios are completely different than the GT
you might be closer to the T56 ratios you had in the 2006 (depending on if you had 2.93 or 2.66 fist gear...) but first is still going to be taller
The ratio will actually be 4.09.
doubt many people have done it on the S650 but the 2018 and newer cars have the same transmission ratios and 4.09 was done plenty of times, head over to Mustang6g.com and have a look
https://www.mustang6g.com/forums/threads/2018-mt82-d4-4-09-vs-4-56.191848/
Do you know what mph you would end up at after 20 seconds of WOT? 7 seconds 60-130 then you have another 13 seconds to hit the speed limiter (if it's still there) or 180-190