Can anyone tell me the Difference between a t3 and a t4,
diff in flow, wich ine is better, which one would spool a turbo faster.
thanx

 

Just size of the turbo in general. T4's are bigger than T3s.

Lots of turbos are "hybrids" with a T4 compressor and a T3's hotside for faster spool, but once you start making \lots of power (over 400 or so to the wheels) you need a T4's hotside becuase a T3 hotside will choke it out.

 

thanx

 

anyone else have an opinion