hi all,is it possible that if the bore on the up pipe that was bought already large bore staight through is bigger bore than on the turbo(not ported) and headers(that are ported by myself)will it cause any harm or affect turbo spool up?

would it be better to port my original up pipe to same as ive done headers and put that back on.

cheers eddy

 

it depends on what turbo you have, you can go to big with the up pipe and it will effect the spool up making the car more laggy

 

i have a tdo5h,and when it spools up it sounds i lot louder than before and it seems take off quick but feels like its holding back is this the lag?

eddy

 

bttt