Ok, so basically i want to get at if you all feel this is worth learning. personally, i feel it is extremely useful and can really make you more dangerous. I can not do it every time, i can do it roughly 60% of my attempts, but it has put me in many favorable leads. However, it sure as hell sucks when it misses.
Basically,. the way i do it is after i land ex palm right as the opponent flips to where his back starts to face the ground i dash and ultra. I dont know if there is more leniency on timing, but from what i have seen the timing is strict. When ultra hits, it’s unfortunately the multi-hitting one, so the damage is not as good. because the damage output is so crappy, i like to save this for when im close to or have ultra level 2. You can get the full hit ultra if you are near the corner and you also do not have to be as fast to input the ultra either. There is one exception for mid-screen that i have found which is against dhalsim. For some reason, against him, if you do it like i described earlier you get the multi-hit ultra, but if you delay your ultra input, like if they were near the corner, so delay maybe a split second longer, you get the full 3 hit animation ultra. I have not been able to recreate this on any other character mid-screen. I hope there is a way to get full hit on everyone mid-screen but i think this might just be dhalsim specific.
I tried this out on all the characters and here is a list of the ones i found it does not work on: fei long, guile, rufus, elf. I am also adding honda to the list as well. reason being, in my initial test i got it to work on him, but later i was not able to do it again.
If anyone else is familiar with doing the ex palm dash ultra post up your thoughts, tips and experiences. lets look into this more, maybe we can figure out how to get that full ultra on everyone mid-screen.
*****EDIT: added from a later post by me so there is no searching for who it works on. **
ok i ran some tests early this morning before i left for work here is what i did. I recorded me doing the combo on ryu: s.fp, expalm, dash, input ultra motion ending in forward and delay a split second and then hit the buttons. got the 3 hit ultra, made sure it worked on both sides and then went through every character. Side note here is that gouken indeed did take a SMALL step forward before the ultra came out. So, im positive this is the key to land the true ultra. Anyway, here are the results.
Hit: Ryu, Cammy, Chunli (left side only), Dhalsim, Ken, Seth (left side only), Boxer, Claw, Sagat, Dictator, Viper, Abel, Gen, Dan, and Sakura. I dont know why for chun li when i moved her to the right side the ultra missed, but thats what happened. Could be it needs to be timed differently or its just a funky quirk with the ultra. For Seth, i got the multi when i moved him to the right side. Again, idk why everything was the same except the side he was on.
Miss or multi: Gouken (miss), Feilong (miss), Akuma (multi), Blanka (multi), Guile (miss i think), Gief (miss), honda (miss), Elf (miss), Rufus (miss), Chun li (miss right side only), seth (multi right side only). note, all these misses/multis are only using the method described above and not the one i described in my initial post.