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hmm.. thanks guys. by the way, can somebody provide me with the size of the turbo from an rb26dett, and that of one from an rb25det? and also, whats the difference in the amount of cfm they flow?

The turbo setup is on a mazda mx6.. (yes yes pick on me all you want but i manage to keep infront of r33 turbos with atleast exhaust mods) Yes, im aware the rb25det turbo is slightly larger.. im not after something bigger as i already find that boost comes on a little too late for my liking.. shaft speed hey? im guessing shaft speed is relative to the amount of air the thing is pushing out? or does it depend on the difference in exhaust/intake side pressure?

Hi guys, I dont own a skyline, but have a turbo from a 1996 rb26dett fitted to my car. Im currently running roughly 12psi (at the intake manifold) with boost controlled via a hks external gate. From what i understand, due to the ceramic wheels, i shouldnt run over 14psi with this turbo.. is this correct? Is it the amount of pressure (psi) or the airflow that causes the turbo to fail? i think im pushing a decent amount of air due to having 2.5" mandrel bent IC pipes (which have a 4" opening at the tb). Its just that i read in a recent zoom article that a guy was running like 16 - 17 psi with the stock turbos. Also, what kind of replacement turbos are out there that are direct fits to the stock flange? i would like something a similar size but more efficent etc.. thanks