So I own a 2003 mustang gt. I was lucky enough to run into a 4.6 liter Mach 1 engine and few weeks later an eaton m112 supercharger. My one concern is, my Mach 1 compression being higher then the actual cobra. I think I will limit my boost to 8 to 10 psi, does anyone know or recommend a max boost for a higher compression motor for my Frankenstein cobra

 

I would start out by searching the SN-95 sub-forums by selecting the search function menu.. When the search box displays, type in 99-04 Cobra and then 03-04 Mach 1.. You'll then come across a listing of threads related to the 03-04 Mach 1 and 99-04 Cobra. Select the threads that best address compression/max boost.. I've also went ahead and included a link for the SN-95 sub-forum section below as well..
Meanwhile, welcome aboard.

https://themustangsource.com/forums/f636/