i know all the popular turbos but i was wondering what are the max psi for all the popular turbos such as the t series or the garrett thanks if anyone know off the top of there head

 

Your best bet would be to speak to a Garret Rep., or authorized dealer for the specs. Turbo's can vary so much. Generally though:

T25 good to 17psi, max. efficiency.
T28 18psi or a little higher
T3 20psi or a little higher
T3/T4 22psi-25psi, or a little higher
T4 25psi-30psi
Anything larger, and you get the picture.

I'm just taking a stab at this, like I said they can vary greatly depending on A/R ratio, impeller design and size, etc. etc.

 

It also depends on the turbo itself... what brand is it, if its been rebuilt, if it has diferent bearings, turbine, compressor... ect.

 

i know it depends i just wanted to see if people have a general idea off the top of there head