You'd better check the pressure-flowrate profile. . S. |: R$ N1 F+ S# u/ c
Moreover, you didn't say what kind of pump you used1 }) l* n h' o' Z) l# d- W
4 I) D, J8 m' _3 dif for variable displacement pump or others! y$ x5 w7 O+ P0 y8 o! Z; n. w
Once you change your device to 45cc then the deadhead pressure changes( ~: P+ d$ ?- m/ @9 H4 Z! C
i7 H: {7 l& V% X P* F9 _
cause more problem.