what's a suitable ID for a turbo feed line?? currently i'm running a 1/4" ID feed line and i believe that might be too large since every now and then i'm experiencing blue smoke when letting off the throttle or driving at low rpms.. what's the typical size that would suffice a t3t4 turbo, 1/8"??

 

if you're having blow by in the seals then wouldn't you want a larger hose, since the same amount of fluid passing in a larger cross-section will have lower pressure?

 

but the larger size would yield a larger flow rate, which i believe might also be a culprit

 

up.