what injectors i should use 2.0 or 1.8

hi ive not long done a 2.0agg convertion to my mk2 with ported cammed and 421 mani.
i used the 2.0 injectors from the dona car i still have the 1.8 didgi ones but thought the 2.0 ones would work fine.

just wanted to know if there is any diffrence bettween the 2.

also i get a flate spot then the power kicks in :s any idears.

 

Which head are you using?

 

use a ported 1.8 gti head

 

???

 

I have a 2.0 agg bottom end with PB head. I am using the original 1.8 fuel rail and injectors and it works fine.

 

aww klkl yh im usein the 1.8 fuel rail with the 2.0 injectors just wanted to know if it would run better with the 1.8 ones.. but thanks mate