I've been asking some of the local turbo workshops if they'd rebiuld my S5 turbo with a garrett TO4 S front cover and new compressor wheel, and from the few I've spoken with, they are not that keen on doing it, they all seem to want to sell me their new turbo's!

Is this option worth while, what are the reasons for not Hybriding S4/5 turbos? Or, should I take the other approach and ask, 'what are the advantages of a S5 Hybrid turbo'?

If anyone has used these Hybrids, could you give me some feed back on the size of compressor wheel I should be using or A/R ratio?

 

i think its a great choice!
had this done with my car. s5 with stock turbine and garrett to4b cover and 54trim to4b compressor wheel, wheel was rated at 44lbs/min. went very well it even felt like it has better boost responce, which suprised me as i thouht this would be a trade off for more power. only running .7bar but very happy.
Now i am installing masterpower to4e. since i am a dealer in nz for these i can get them gd price so not worth giong further with s5 turbo.