This has been gone over ad nauseum ,,. but to refresh, you only need more pressure fed into the blamed thing if it's a MODERN HIGH PRESSURE computer controlled diesel. For our old relics, the only thing that the lift pump is there for is to aid in bringing fuel up TO the injection pump when the vehicle is operating in conditions where the injection pump is much higher than the fuel tank ( i.e. climbing hills ) In reality, with a healthy injection pump, you can drive on flat ground indefinitely WITHOUT ANY LIFT PUMP! But the injection pump is already better than a foot above the fuel tank when the truck is level and you add grade to the equation and it starts getting steep quick, so the injection pump just needs a little bit of assistance in having fuel DELIVERED to it ( which is why they call it a fuel delivery pump and not a fuel shove it down the blamed things throat pump
I have personally got up and forgot to switch my pump on and driven all the way to the city around an hour with NO ELECTRIC PUMP running on more than one occasion and didn't notice till I got to the big hill across the river and it started stumbling.
I was the first one to use a Facet Dura Lift. I went looking for a commercial duty DIESEL rated pump after the HOLLEY blue that was on my truck laid down like a cheap ***** and I called Holley and found they wouldne sell me what I needed to rebuild the POS, ( but for for about the same price as a new one , they would be MORE than happy to LET me send it in to THEM and THEY could rebuild the thing
No thanks Speed shop parts really have no business on something that you need to have reliable. THats when I went hunting for a reliable, commercial grade diesel pump and found the Facet. Initially it was the factory stock lift pump on the carrier transicold refrigeration trailers and since then it has now been adopted by their bompetition and is now also the factory lift pump on the Thermoking refrigerated trailers ( both of which, by the way, used to use Carter pumps in most of their units, but the reliability of the duralift was just to much to ignore) These pumps are designed to run 24 hours a day, 7 days a week. Speed shop pumps are designed to make 3 or 4 passes on a weekend REALLY fast once in a while, then go back in the trailer till next time where they get towed around by the reliable vehicle.
When I bought the very first one, it was rather amusing, The parts man at the Carrier dealer got lost in the parts room for a half hour trying to find the thing. He finally found it and came back apologizing, and explained, that they had a case or the things, but had NEVER had to replace one! Not bad considering they are at the crossroads of I-40 and I-30 and the center of where most of teh chickens and a good percent of the catfish in the country get shipped out from not to mention a large number of the nations truck companies being based in the area... and not one failure ( and they get a LOT of busted ****** units in that shop every day ) Thats a very good sign
Ive had my pump on since just after I got my truck and thats been about 6 years now and well over 100k miles ( now I have 2 of teh things and run a split system , one for my bed tank and one for my factory rear tank... always good to have a little overkill backup, we like to travel a lot , but so far, it hasnt been an issue,
The built in filter screen in that thing saves a minor fortune in spin on filters. You can visually see when it needs cleaning so there is no guess work, it will ALWAYS clog before the spin on. You just whip it off shoot some carb cleaner or brake parts cleaner through the screen, fill with atf or fuel additive, and fire back up and on your way. First few times you do that instead of having to change a spin of from a bad batch of fuel, the thing has paid for itself
If you start getting into one of those big jumbo high pressure high volume pumps, a bypass regulator is not enough. THe return lines on your truck are only 5/16 and the id of teh steel line is only roughly 1/4" and in no way can it handle the volume, even with a bypass regulator bypassing the injection pump it will still backup in the return lines and and cause a pressure buildup at the injection pump causing timing and pressure problems You would have to remove your fuel selector valve and replace with manual valves and rum much larger return lines all the way to the fuel tanks directly from the bypass regulator to avoid pressure buildup. You are talking about a massive undertaking., and if you dont balance it just right, you risk air intrusions
