I know that gerotor and vane pumps don't like to be dry. I think gerotor even more so. I'm sure the large tube will help with priming,. That's a large volume of air its got to get through first.Thanks Duvall!
I usetacould be able to lay TIG welds on thicker carbon steel that I wasn’t ashamed of, with practice I should be able to get there again and on a wider range of materials. This thinnish stainless in an awkward layout has proven to be quite a challenge for my rusty skills.
The lift pump is a gerotor. I would hope it would be easier for it to prime with the larger tube since the purpose of it is to make it easier for the pump to run, but I guess I’ll be finding out soon.
My return line for the pressure regulator return is -8 Russell Pro Classic II AN hose. My return mine for the IP and injectors is 5/16” 30r9 fuel injection hose.
The return-style regulator is probably overkill, but I’ve been wanting to try it for a while so I decided to give it a go while I had the opportunity.
Ah yes, more air to deal with pre-fuel, good call. I don’t know how much it will help, but I think I’ll pull the pre-filter off and fill it with fuel to help reduce the volume of air pre-pump. In fact I can probably shoot some fuel into the 45 degree hose between the filter and pump which should quickly prime the pump and then it should be able to work through the slug of air in between the tank and filter.I know that gerotor and vane pumps don't like to be dry. I think gerotor even more so. I'm sure the large tube will help with priming,. That's a large volume of air its got to get through first.
Did you decide to run hose rather than hard line for the ease of mounting?
I wouldn't say your return regulator is overkill. I know you are looking for 25psi at the IP. Your lift pump pressure must be well above that. Return style regulator will give you more consistent pressure at your injection pump. Its going to be a slick setup.
On gear driven pump, thats a sign of air leak. Usually, Gear pumps are self priming, and can draw into vacuum easily.I used my shop vac to blow into the tank to lightly pressurize it until the pump was primed. IIRC mine wouldn't prime on it's own
The carbon drawn to the surface creates hardening of the steel on the surface and vibrations and rattlings will help to promote cracks and cracking.Thanks for mentioning this. I don't know about cracking, but I totally flaked out on the carbon promoting corrosion. I have some stainless wire wheels on order and I'll be cleaning it up after I receive those.