Can someone explain what the difference is between a stg1/2/3 hybrid turbo and a t34 please.

 

easiest way to tell the difference is that all T3s, no matter what "stage" hybrid they are are still the pissy small T3 compressor housing, a T34 has a far bigger one.

A T34 should have the cossie 3stud exhaust housing outlet too with either .48 or .63 a/r stamped on it rahter than the RST style outlet that needs that stoopid elbow

 

Std - 270 bearing 55 trim compressor std ex housing
St1 - as above plus 360
st2 - as above but using 60 trim compressor
st3 as above (60 trim,360) plus .48 housing

Thats commonly the stages for rst but each supplier differs on specs for each stage

 

or use steves simple explanation

 

Ave a look at Fast Ford this month. Turbo Technics has got a Q&A Section.

 

Cheers

I bought a stage2 hybrid from turbo technics but want something more meaty now as i'm doing a 2.1l 16v turbo conversion on my S2, can i upgrade it easily or should i just sell it and get something else