I guess I should say ive seen a few posts of pistons breaking and rods coming out of the blocks. I guess in the big picture its not that many out of all the mustangs sold but im not sure how many forced induction guys have had a problem.
One thing to keep in mind with forced induction on a high compression motor is to keep the timing low. Its ok to run 12 PSI but once you start adding timing its a ticking time bomb. I'm only running 7 PSI and timing is locked at 17 degrees on E85. If I were on 93 I wouldn't run more then 10 PSI and 13-14 degree's of timing. Thats just me, and I daily drive my car 64 miles everyday to and from work. I'd rather be conservative then have to replace a motor. Still a fun car at 700/700.
People are not advertising they popped their motors. From shop to shop the owners talk. I know of 2 within the last 4-6 months that have popped and rebuilt their motors. These were brand new 2018 Mustang GT's with power adders.
There was a guy that installed an old LPF kit he had on his 1st gen s550 installed onto his 2018. They didn't hook up the wastegate lines I believe and it spiked around 18+lbs... Needless to say his motor didn't last. That would've put him at well over 1300+ to the wheels
I read that they are on a 3rd 10r80 which is believable since it slips as for the stock motor unless someone actually witnessed it themselves it's all speculation. Seeing that Hellion has made over 4 digit power on the stock sealed motor one would think it is possible, are you implying that the motor is not stock as claimed ?
Being from Houston where they are I hear a lot of things. Whether they are true or not I'm not certain.