A couple of thinks come to mind. The brake pipes should be 3/16". If 1/4" pipe is used you will get a pressure drop in the system. Make sure the brake pipe flares are a double flair. Single flares will crack and leak or suck air into the system. You don't mention what type of hose your running to the wheels. If it's an automotive hose from a production vehicle, check that theres nothing inside the hose blocking the fluid flow. If it's -AN hose, it should be -03 w/ teflon liner, and the proper fittings. Also check your banjo bolt/ hose/ sealing washer/calipier for fluid flow thru the fitting. Sometimes there isn't enough clearence between the bolt and hose, or between the end of the bolt and the inside of the calipier [the bolt bottoms out]. Hope this helps.