I've been hearing talk about dual feeding a VE pump through the stock inlet and then running another fuel line to the Fuel Shutoff Solenoid hole...I've heard it may help keep a 14mm VE alive by keeping the head/rotor well lubricated and cooled. So has anyone tried this or is this a false theory? I'm willing to try it with my 14mm VE I will hopefully be putting on in the next few weeks, I just want some ideas/opinions before I screw something up. I've got a spare FSS I could drill out and make into a fuel fitting, then just "T" off another feed hose from my airdog hose going to my stock inlet.

My main question/concern is how much pressure would be pushing back if I put a fuel line to the FSS hole? In other words why does the FSS rubber plunger blow to pieces when we turn up the pressure via full power screw? how much pressure are we talkin here and would it overcome say 25-30psi of incoming fuel pressure? I would have to go back to the ol tractor manual kill cable with no more cooldown timer, but I could maybe rig up a solenoid to the manual kill someday if needed be and this theory worked. So is it worth trying or is it a bad idea?

 

I don't know about using the FSS hole, but I would use a fitting to extend the fuel outlet fitting so you can feed through there or modify the pump lid to take a 1/8" pipe fitting.

What I was planning on doing, but never got the chance was feeding the whole mess with one pump with a boost referenced regulator 15 psi base pressure (psi will raise with boost pressure). Feed the normal inlet and then feed the pump case with a check valve in the line so pump case pressure (normally over 100 psi) won't feed into the inlet line. The intention was that when under full power the fuel pressure would be around 60 psi and if the pump case dropped below that it would flow 60 psi fuel into it.

 

BAD IDEA

Do not use the FSS hole as a feed with only 20-30 psi. The pressure there is case pressure and would be a waste of time unless you have a supply pump of at least 150-200psi.

I dual fed mine for a while through the return port with a check valve in place. IMO its more of a precautionary measure for those who have issues with low case pressure at WOT.