So Ive been trying my hand at vacuum infusion for a couple attempts now. I had issues with vacuum but figured what I was doing wrong with the molding process. That being said I have a 3cfm dual stage pump and it will only pull -29.5 to -29.75 psi (thats only connected to the catch pot) as well I dont think thats an issue my other problem is that I cant seem to get the resin to pull through the part before it fully cures. I know the resin is a 'low viscosity' but it will get about halfway through the part and then the resin will just crawl through with me ending up wasting quite a few ounces of resin because it will harden in the container. This part is an interior a-pillar part for an Acura so its a small part but it takes at least an hour to pull the resin through. Am I using too much hardener or should I go with a slow cure time? My concern is that ive pulled what resin I could get into the part through and so its thinner than it should be. To add, what is the resin to Carbon fiber ratio in ounces for vacuum infusion? 

You certainly do need to step the grits, as Hanaldo says 400-1000 is too big a jump.