Is the "race" ,HP oil pump the same as the stock FD pump ? , also is any one using the HP oil pressure regulator sold by MAZDATRIX sucessfully ?. I am going back into my motor again and I am looking for some oiling mods so that I would be able to sustain 10'000rpm redline shifts !.

 

The pump you mentioned above is not for the Fd. It's for the 1st gen and earlier motors. Plus the only difference between the 'hp' pump and the stock oil pump would be the heat treated gears. They both flow the same.
From what I've been told the factory FD and 20B oil pumps are the best that Mazda got. Anything better would be going to a dry sump. Also don't be too concerned with pressure. It's the volume that matters. All of the factory pumps can get the same pressure but the volume is what's the difference among them.
The FD's oil regulator is good for 95psi. The race one is the only higher rated one sold.
The factory Fd's got just but every oiling mode needed to sustain high rpm. What's needed is someone to blueprint and make everything work properly.

 

The RB oil pump flows more than the 12a's oil pump. It is hardened and as big as the 13b's.