Why does pump cfm matter so much for short path?

[SidViscous]

You mean this one?:

Vacuum pump matching test

To close the topic and to educate everyone on the actual method of mating pumps up I will explain. A 20cfm pump can perform better than a cheap garbo 40cfm pump. Pump quality matters. What you are looking at is the performance curve. Now another thing to remember is most pumps are supplied with a pump curve chart. Half of them are fake. The reason is becusee the Garbo pump manufacturers don’t actually know anything about testing. They throw shit parts together and don’t own a digital pu…