Im using Nissan turbo. Using a 1.7" diameter pipe I've connect my turbo to intercooler.
from Intercooler to TB ill be using a 2.25" diameter pipe.

Is this a proper setup i've already completed my turbo to intercooler piping but if u guys think that 1.75" is not a proper size for it then i can change it too. Though piping frrom intercooler to TB is still pending. That will be done after ur suggestions

please suggest

 

Im assuming the outlet on the turbo is 1.7?Odd size.Usually a 2.25 or 2.5 is used.The 2.25 to the throttle body sounds good.What engine.car is this?What are the inlets on the intercooler?

 

1.75" is rite from turbo
intercooler pipes are 2.5"