You'd better check the pressure-flowrate profile. 5 n& S% G' ]9 J+ w% I& g
Moreover, you didn't say what kind of pump you used $ p4 S2 U. [% D+ E: K 6 L" q. d2 K+ xif for variable displacement pump or others * n7 ]% o+ A I% XOnce you change your device to 45cc then the deadhead pressure changes " n+ N) d3 n3 _) f% I( C 4 z. Y5 J M" {9 @cause more problem.