So I was all set to order some pumps for my RCR40 project. My plan is for -an8 to manual tank selector valve, to 100micron filter, to low pressure pump, to swirl pot, to high pressure pump, to 10micron filter, to fuel rails for the Classic Injection System. Return fuel to the tanks via -an6 lines. In reading posts on here and other sites, a geroter low pressure pump was in order since fuel had to be lifted out of the tanks. I liked the specs of the Holley billet pumps(12-600) and called their tech line to confirm my choices for filter and pump.
Tech dude put me on hold for a couple of minutes to consult someone who knew the answer. He came back to say all those pumps need to be gravity fed. My reiterating the positive displacement of the geroter design did not cause him to budge from his position. I concluded that, in order to get a reasonable life from their pumps, they want it insured to be constantly bathed in fuel for lubrication.
So to stick with Holley products I would have to proceed against tech dude's advise and hope the pump will hold up to the possibility of some air passing through such as during the initial prime. If someone has some long term experience with a particular pump holding up pulling fuel I'd appreciate the info.
In the same conversation I asked about T'ing their hydramats together inside our long narrow fuel tanks, one in the back of the tank and one in the front. He was all over that idea. Unfortunately that is the better part of a $600 decision. FYI
Tech dude put me on hold for a couple of minutes to consult someone who knew the answer. He came back to say all those pumps need to be gravity fed. My reiterating the positive displacement of the geroter design did not cause him to budge from his position. I concluded that, in order to get a reasonable life from their pumps, they want it insured to be constantly bathed in fuel for lubrication.
So to stick with Holley products I would have to proceed against tech dude's advise and hope the pump will hold up to the possibility of some air passing through such as during the initial prime. If someone has some long term experience with a particular pump holding up pulling fuel I'd appreciate the info.
In the same conversation I asked about T'ing their hydramats together inside our long narrow fuel tanks, one in the back of the tank and one in the front. He was all over that idea. Unfortunately that is the better part of a $600 decision. FYI
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