hi ,
iv got a genuine garret t4 with a real big exhaust housing on with external wastgate, im thinking of useing this turbo soon for about 450bhp, and i want to put the ex housing back to a 0.63, with internal waste gate.
my question is will my 0.63 housing from my t34 fit,or dous the t4 have its own unique housing?

thank you....mart

 

99% sure it will fit, the core of the T3/T34/T4 is the same.
tabetha

 

i hope so, cheers tabs

 

i think the turbine wheel on a T4 is bigger though, like the t2 is to a t3.
i remember a turbo centre telling me one cosworth turbo had a different core/exhaust turbine size that wouldn't work with a t3 housing, i assume it'd be the T4.

 

No it's the small turbo escos that is a different core, the actual core(bearing housing) is 100% the same on T3 T34 T4.
tabetha

 

ok then, the small turbo core will be smaller as it's a T25, so that makes sense.
the bearing housings are the same, but i'm fairly convinced the turbine wheel is bigger on a T4, cause a T34 is basiclaly a T3 turbine wheel and a T4 compressor wheel IIRC

 

The T4 will NOT fit in a T34 rear housing, the cores are all the same on T3, T34 and T4's but as stated above the T4 has a larger turbine wheel so wont fit into the smaller T34 housing, front ends are all different even down to 3 sizes of T3 (escort turbo, 2wd cos and 4x4 cos) T34 is larger and T4 is larger again even though all the cores are the same,

 

nackers!!! cheers mate
anyone got a 0.63 exhaust housing for a garrett t4 for sale then??